Germanium Lens Blank Cutting Machine: Round, Square & Prism Blanks<\/title>\n<meta name=\"description\" content=\"The SGR40 germanium lens blank cutting machine slices and prism-cuts Ge ingots into round, square and polygonal blanks at ~0.5 mm kerf. 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.play{transform:scale(1.06);background:var(--blue-dark)}\n .video-ph .play svg{width:24px;height:24px;fill:#fff;margin-left:3px}\n .video-ph .t{position:absolute;bottom:14px;left:0;right:0;text-align:center;font-family:var(--mono);font-size:11px;color:var(--blue-deep);font-weight:600;padding:0 12px}\n .rise{opacity:0;transform:translateY(14px);animation:rise .7s cubic-bezier(.2,.7,.2,1) forwards}\n .d1{animation-delay:.04s}.d2{animation-delay:.12s}.d3{animation-delay:.2s}.d4{animation-delay:.28s}.d5{animation-delay:.36s}\n @keyframes rise{to{opacity:1;transform:none}}\n @media(prefers-reduced-motion:reduce){.rise{animation:none;opacity:1;transform:none}}\n .geo *{vector-effect:non-scaling-stroke}\n<\/style>\n<\/head>\n<body>\n\n<section class=\"hero\">\n <div class=\"wrap\">\n <div>\n <div class=\"model-line rise d1\">SGR40 \u00b7 Endless Diamond Wire Saw<\/div>\n <h1 class=\"rise d2\">Germanium Lens Blank Cutting Machine<\/h1>\n <p class=\"lede rise d2\">One machine that <strong>slices round blanks<\/strong> and <strong>prism-cuts polygons<\/strong> from germanium ingots \u2014 at a closed-loop wire kerf near 0.5 mm, so you keep the expensive material instead of grinding it into slurry.<\/p>\n <div class=\"chips rise d3\">\n <div class=\"chip\"><div class=\"v\">~0.5<small> mm<\/small><\/div><div class=\"l\">Wire kerf<\/div><\/div>\n <div class=\"chip\"><div class=\"v\">\u00b10.01<small> mm<\/small><\/div><div class=\"l\">Repeatability<\/div><\/div>\n <div class=\"chip\"><div class=\"v\">\u00d8380<small> mm<\/small><\/div><div class=\"l\">Worktable<\/div><\/div>\n <div class=\"chip\"><div class=\"v\">59<small> m\/s<\/small><\/div><div class=\"l\">Max wire speed<\/div><\/div>\n <\/div>\n <div class=\"hero-actions rise d4\">\n <a class=\"btn\" href=\"#quote\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\"><path d=\"M5 12h14M13 6l6 6-6 6\"\/><\/svg>Get a sample cut<\/a>\n <a class=\"btn btn-ghost\" href=\"#video\">Watch it cut<\/a>\n <\/div>\n <\/div>\n <div class=\"hero-visual rise d3\">\n <div class=\"vhead\"><span>FIG.01 \u2014 ROTARY-AXIS PRISM CUT<\/span><b>SGR40<\/b><\/div>\n <div class=\"vbody\">\n <svg class=\"geo\" viewBox=\"0 0 460 290\" width=\"100%\" role=\"img\" aria-label=\"SGR40 rotary worktable indexing a germanium cylinder into an octagonal blank with a 0.5 mm wire kerf callout\">\n <defs><marker id=\"ar\" markerWidth=\"9\" markerHeight=\"9\" refX=\"6\" refY=\"4.2\" orient=\"auto\"><path d=\"M0 0 L9 4.2 L0 8.4 z\" fill=\"#0274BE\"\/><\/marker><\/defs>\n <circle cx=\"150\" cy=\"150\" r=\"92\" fill=\"none\" stroke=\"#B8DBEF\" stroke-width=\"1.4\" stroke-dasharray=\"3 5\"\/>\n <circle cx=\"150\" cy=\"150\" r=\"6\" fill=\"#14202C\"\/>\n <circle cx=\"150\" cy=\"150\" r=\"72\" fill=\"#D5E8F6\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <polygon points=\"150,82 197,101 216,150 197,199 150,218 103,199 84,150 103,101\" fill=\"rgba(2,116,190,.16)\" stroke=\"#0274BE\" stroke-width=\"2.2\"\/>\n <path d=\"M150 60 A90 90 0 0 1 236 120\" fill=\"none\" stroke=\"#0274BE\" stroke-width=\"1.7\" marker-end=\"url(#ar)\"\/>\n <text x=\"246\" y=\"84\" font-family=\"IBM Plex Mono\" font-size=\"12\" fill=\"#015A93\">index \u03b8<\/text>\n <line x1=\"300\" y1=\"34\" x2=\"300\" y2=\"266\" stroke=\"#14202C\" stroke-width=\"2\"\/>\n <text x=\"308\" y=\"44\" font-family=\"IBM Plex Mono\" font-size=\"11\" fill=\"#4E5C72\">\u00d80.4 mm wire<\/text>\n <line x1=\"216\" y1=\"150\" x2=\"296\" y2=\"150\" stroke=\"#0274BE\" stroke-width=\"1\" stroke-dasharray=\"2 3\"\/>\n <line x1=\"296\" y1=\"138\" x2=\"304\" y2=\"138\" stroke=\"#0274BE\" stroke-width=\"1.4\"\/>\n <line x1=\"296\" y1=\"162\" x2=\"304\" y2=\"162\" stroke=\"#0274BE\" stroke-width=\"1.4\"\/>\n <text x=\"316\" y=\"156\" font-family=\"IBM Plex Mono\" font-size=\"12\" fill=\"#015A93\">kerf \u2248 0.5<\/text>\n <text x=\"352\" y=\"210\" font-family=\"IBM Plex Mono\" font-size=\"11\" fill=\"#4E5C72\">3\u00b74\u00b75\u00b78\u00b79-gon<\/text>\n <text x=\"352\" y=\"226\" font-family=\"IBM Plex Mono\" font-size=\"11\" fill=\"#4E5C72\">one setup<\/text>\n <\/svg>\n <\/div>\n <div class=\"vcap\">Rotary table indexes the workpiece between cuts \u2014 round stock to triangle, square, pentagon, octagon or nonagon without re-clamping.<\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">The Machine<\/div>\n <h2>A fully enclosed upright wire saw<\/h2>\n <p>Steel frame, observation window, side touchscreen \u2014 built to keep coolant mist and swarf contained on a working shop floor.<\/p>\n <\/div>\n <div class=\"video-wrap\">\n <figure class=\"shot\">\n <img fetchpriority=\"high\" decoding=\"async\" src=\"images\/sgr40-germanium-lens-blank-cutting-machine.jpg\" alt=\"SGR40 germanium lens blank cutting machine front view\" width=\"1100\" height=\"770\" onerror=\"this.style.display='none';this.nextElementSibling.classList.add('show')\" title=\"Vimfun glass cutting equipment is a perfect machine tool for precision cutting\">\n <div class=\"ph\">\n <svg viewBox=\"0 0 460 320\" role=\"img\" aria-label=\"SGR40 germanium lens blank cutting machine \u2014 enclosed upright frame with observation window and touchscreen\">\n <rect x=\"0\" y=\"0\" width=\"460\" height=\"320\" fill=\"none\"\/>\n \n <rect x=\"118\" y=\"252\" width=\"232\" height=\"44\" rx=\"6\" fill=\"#015A93\"\/>\n <rect x=\"136\" y=\"296\" width=\"26\" height=\"16\" fill=\"#14202C\"\/>\n <rect x=\"306\" y=\"296\" width=\"26\" height=\"16\" fill=\"#14202C\"\/>\n \n <rect x=\"110\" y=\"42\" width=\"248\" height=\"214\" rx=\"12\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"2.2\"\/>\n \n <rect x=\"134\" y=\"70\" width=\"150\" height=\"150\" rx=\"8\" fill=\"#D5E8F6\" stroke=\"#0274BE\" stroke-width=\"1.6\"\/>\n \n <circle cx=\"170\" cy=\"104\" r=\"16\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <circle cx=\"248\" cy=\"104\" r=\"16\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <circle cx=\"209\" cy=\"190\" r=\"13\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <path d=\"M170 120 L209 177 M248 120 L209 177 M170 88 Q209 70 248 88\" fill=\"none\" stroke=\"#0274BE\" stroke-width=\"1.8\"\/>\n \n <circle cx=\"209\" cy=\"150\" r=\"15\" fill=\"rgba(2,116,190,.18)\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n \n <rect x=\"300\" y=\"92\" width=\"44\" height=\"64\" rx=\"5\" fill=\"#14202C\"\/>\n <rect x=\"306\" y=\"100\" width=\"32\" height=\"34\" rx=\"2\" fill=\"#0274BE\"\/>\n <line x1=\"306\" y1=\"142\" x2=\"338\" y2=\"142\" stroke=\"#2685C8\" stroke-width=\"2\"\/>\n <line x1=\"306\" y1=\"148\" x2=\"326\" y2=\"148\" stroke=\"#2685C8\" stroke-width=\"2\"\/>\n \n <text x=\"134\" y=\"244\" font-family=\"Sora,sans-serif\" font-weight=\"800\" font-size=\"15\" fill=\"#015A93\">SGR40<\/text>\n <text x=\"250\" y=\"244\" font-family=\"IBM Plex Mono\" font-size=\"10\" fill=\"#4E5C72\">ENDLESS WIRE<\/text>\n <\/svg>\n <div style=\"font-family:var(--mono);font-size:10.5px;color:var(--ink-soft);padding:9px 14px;background:var(--white);border-top:1px solid var(--line)\">[ Illustration placeholder \u2014 upload images\/sgr40-germanium-lens-blank-cutting-machine.jpg on deploy ]<\/div>\n <\/div>\n <figcaption>SGR40 \u2014 enclosed upright frame, observation window, side-mounted touchscreen.<\/figcaption>\n <\/figure>\n <div>\n <p>The SGR40 germanium lens blank cutting machine ships as a fully enclosed upright unit. The cabinet keeps coolant mist and swarf contained, and the observation window lets the operator watch the diamond wire and rotary fixture during a cut \u2014 useful when you're proving out a new prism angle.<\/p>\n <ul class=\"build-list\">\n <li><b>Footprint<\/b> ~1044 \u00d7 943 mm \u00b7 height ~1970 mm<\/li>\n <li><b>Weight<\/b> ~680 kg \u2014 rigid frame for low vibration<\/li>\n <li><b>Interface<\/b> side touchscreen + handheld controller<\/li>\n <li><b>Cooling<\/b> recirculating coolant with mist recovery<\/li>\n <li><b>Power<\/b> 220 V three-phase \u00b7 1.5 kW<\/li>\n <\/ul>\n <a class=\"btn btn-ghost\" href=\"#quote\">Request the full spec sheet<\/a>\n <\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">Key Features<\/div>\n <h2>What the SGR40 germanium lens blank cutting machine does<\/h2>\n <p>Two motions \u2014 a servo YZ slicing stage and a programmable rotary table \u2014 give you round blanks and multi-faceted prism blanks from a single setup.<\/p>\n <\/div>\n <div class=\"feat-grid\">\n <div class=\"feat\"><div class=\"num\">1<\/div><h3>Multi-angle prism & polygon cutting<\/h3><p>The rotary worktable indexes to any angle and produces triangles, squares, pentagons, octagons or nonagons \u2014 multi-faceted germanium blanks without re-clamping.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">2<\/div><h3>Automatic round-blank slicing<\/h3><p>Set thickness and quantity on the touchscreen; the machine slices a Ge cylinder into discs unattended, and supports different thicknesses inside one job.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">3<\/div><h3>~0.5 mm closed-loop kerf<\/h3><p>The endless diamond wire keeps the kerf near wire diameter \u2014 roughly $200\u2013$600 of germanium saved per ingot versus a core drill.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">4<\/div><h3>Servo YZ motion, \u00b10.01 mm<\/h3><p>Linear guides and ball screws on both axes give 0.01 mm feed resolution and \u00b10.01 mm repeatability for consistent blank thickness.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">5<\/div><h3>Enclosed frame + PLC touchscreen<\/h3><p>Steel frame with an observation window, English-language PLC, and a handheld controller for manual alignment and override.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">6<\/div><h3>Water cooling + auto lubrication<\/h3><p>Recirculating coolant with mist recovery and an automatic oiling system keep the cut clean and maintenance low.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section id=\"video\">\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">Videos<\/div>\n <h2>See the SGR40 rotary wire saw in action<\/h2>\n <p>This walkthrough shows how the germanium lens blank cutting machine pairs an endless diamond wire with the programmable rotary worktable. Watch the servo-driven YZ axes, automatic tension control, and the rotating fixture index a workpiece between cuts to build a clean polygon in one program.<\/p>\n <\/div>\n <div class=\"vid-2\">\n <div class=\"vid-item\">\n <div class=\"video-frame\">\n <iframe src=\"https:\/\/www.youtube.com\/embed\/6DD97_LPO3c\" title=\"SGR40 germanium lens blank cutting machine \u2014 working principle\"\n loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n <\/div>\n <p class=\"cap\">\u25b8 Working principle \u2014 rotary prism & polygon cutting<\/p>\n <\/div>\n <div class=\"vid-item\">\n <a class=\"video-ph\" href=\"https:\/\/www.youtube.com\/@endlessdiamondwireloop\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Slicing function demo video\">\n <span class=\"play\"><svg viewBox=\"0 0 24 24\"><path d=\"M8 5v14l11-7z\"\/><\/svg><\/span>\n <span class=\"t\">Slicing function demo \u2014 paste your YouTube embed ID here on deploy<\/span>\n <\/a>\n <p class=\"cap\">\u25b8 Slicing function \u2014 automatic round Ge blanks<\/p>\n <\/div>\n <\/div>\n <p style=\"color:var(--ink-soft);font-size:15px;margin-top:18px\">Material in the working-principle clip is optical glass; germanium runs at a lower wire speed (30\u201345 m\/s), but the motion sequence is identical. <a href=\"#quote\">Request a germanium sample cut \u2192<\/a><\/p>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">The Cost Driver<\/div><h2>Why germanium kerf loss is the real number<\/h2><\/div>\n <div>\n <p>A 200 mm germanium ingot is worth $6,000 to $10,000 at today's $1,800\u2013$2,400\/kg spot price. Run that ingot through a core drill and you lose 30\u201340% of it to kerf and edge chipping before a single surface is ground. The SGR40 germanium lens blank cutting machine goes straight at that loss with a closed-loop kerf near 0.5 mm.<\/p>\n <p>The math we run for customers is simple. A core drill removes an entire cylindrical shell on every cut \u2014 typical bit kerf is 5 to 10 mm. Push that through a $2,200\/kg ingot and you waste $11\u2013$15 of germanium per cut. An ID saw does better on kerf (0.3\u20130.5 mm) but leaves a 30\u201380 \u00b5m subsurface damage layer the polisher grinds away later, plus concentric blade marks as the blade wears.<\/p>\n <p>A closed-loop diamond wire runs unidirectionally, so there's no reversing pattern, the abrasive face refreshes as the loop circulates, and the kerf stays near the wire diameter. For germanium we run 0.35\u20130.5 mm wire, landing the kerf around 0.5 mm \u2014 <span class=\"hl\">$200\u2013$600 of germanium kept per ingot<\/span>. The process detail is on our <a href=\"https:\/\/www.opticalcutting.com\/germanium-lens-blank-cutting\/\">germanium lens blank cutting<\/a> page.<\/p>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Two jobs, one setup<\/div><h2>Round blanks and prism blanks<\/h2><\/div>\n <div>\n <h3>Round lens blanks (puck slicing)<\/h3>\n <p>Program slice thickness and quantity, and the machine slices a germanium cylinder into discs automatically \u2014 mixing, say, 8 mm lens blanks and 3 mm window blanks in one run off the same rod. Cut surfaces come off the wire at Ra 0.6\u20131.2 \u00b5m with TTV around 8\u201315 \u00b5m over a 50 mm disc, flat enough that the grinder can usually skip a rough pass.<\/p>\n <h3 style=\"margin-top:22px\">Square, polygonal and prism blanks<\/h3>\n <p>Enter a prism angle and the rotary table indexes the workpiece between cuts \u2014 triangle, square, pentagon, octagon or nonagon, in one setup. For beam-folding prisms, square window blanks, or polygonal blanks ground into non-circular optics, this avoids the wasteful \"cut an oversized square, then grind it round\" route that throws away germanium and chips at the corners.<\/p>\n <div class=\"note warn\"><div class=\"t\">\u26a0 Setup gotcha<\/div><p>Center the rotary table on the workpiece OD with a dial indicator before the first cut, or the polygon comes out asymmetric. Basic \u2014 but skip it and you'll scrap the first blank.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Comparison<\/div><h2>How does the 0.5 mm kerf compare to core drilling and ID saws?<\/h2><\/div>\n <div>\n <p>Short version: the wire wins on material yield and surface quality; it loses on raw parts-per-hour against a multi-wire saw. Here's the honest comparison for germanium.<\/p>\n <table class=\"tbl\">\n <thead><tr><th>Method<\/th><th>Kerf<\/th><th>Edge chipping<\/th><th>Subsurface<\/th><th>Pcs\/cut<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Core drill<\/td><td>5\u201310 mm<\/td><td>0.3\u20130.8 mm<\/td><td>high<\/td><td>1<\/td><\/tr>\n <tr><td>ID saw<\/td><td>0.3\u20130.5 mm<\/td><td>moderate<\/td><td>30\u201380 \u00b5m<\/td><td>1<\/td><\/tr>\n <tr><td class=\"hl\">SGR40 closed-loop wire<\/td><td class=\"hl\">~0.5 mm<\/td><td class=\"hl\">< 0.1 mm<\/td><td class=\"hl\">low<\/td><td>1<\/td><\/tr>\n <\/tbody>\n <\/table>\n <p>A 0.1 mm edge chip on the cut blank means the centering machine takes a 0.1 mm stock allowance instead of 0.5 mm \u2014 less germanium ground off, fewer passes. In our experience that downstream effect is bigger than the cutting-stage saving people focus on first.<\/p>\n <div class=\"note\"><div class=\"t\">Fair warning on speed<\/div><p>The spec lists max wire speed at 59 m\/s, but we run germanium at 30\u201345 m\/s, feed 10\u201320 mm\/min for slicing (4\u20138 mm\/min on prism paths). Germanium cleaves on the {111} plane \u2014 it punishes aggressive feeds. Full material data is in <a href=\"https:\/\/www.crystran.co.uk\/optical-materials\/germanium-ge\" target=\"_blank\" rel=\"noopener noreferrer\">Crystran's germanium datasheet<\/a>.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">Engineering Highlights<\/div>\n <h2>Built for high-value brittle optics<\/h2>\n <p>The features that matter when the material on the table costs more than the cut.<\/p>\n <\/div>\n <div class=\"hl-grid\">\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M12 3v18M5 8l7-5 7 5\"\/><\/svg><\/div><div><div class=\"v\">Up to 59 m\/s wire<\/div><div class=\"d\">High closed-loop linear speed for clean, fast cuts.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"8\"\/><path d=\"M12 8v4l3 2\"\/><\/svg><\/div><div><div class=\"v\">\u00b10.01 mm repeatability<\/div><div class=\"d\">Servo YZ on linear guides and ball screws.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M4 18 L9 7 l3 6 3-9 5 14\"\/><\/svg><\/div><div><div class=\"v\">< 0.1 mm chipping<\/div><div class=\"d\">Low-stress wire cut on germanium edges.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M3 7h18M3 12h18M3 17h18\"\/><\/svg><\/div><div><div class=\"v\">Multi-material<\/div><div class=\"d\">Ge, ZnSe, ZnS, silicon, sapphire, optical glass.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M5 12l5 5 9-11\"\/><\/svg><\/div><div><div class=\"v\">Free sample cut<\/div><div class=\"d\">Send your material and drawing; we cut a proof.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M12 3l8 4v6c0 4-3 7-8 8-5-1-8-4-8-8V7z\"\/><\/svg><\/div><div><div class=\"v\">1-year warranty<\/div><div class=\"d\">Plus remote support and user-replaceable wire.<\/div><\/div><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Datasheet<\/div><h2>SGR40 technical specifications<\/h2><\/div>\n <div>\n <p>Standard-configuration numbers for the SGR40 germanium lens blank cutting machine. Worktable and travel can be customized for larger ingots.<\/p>\n <table class=\"tbl datasheet\"><tbody>\n <tr><td>Worktable size<\/td><td>\u00d8 380 mm<\/td><\/tr>\n <tr><td>Max workpiece height<\/td><td>280 mm<\/td><\/tr>\n <tr><td>Y \/ Z axis travel<\/td><td>380 mm \/ 380 mm<\/td><\/tr>\n <tr><td>Diamond wire diameter<\/td><td>0.35\u20131.0 mm<\/td><\/tr>\n <tr><td>Max wire linear speed<\/td><td>59 m\/s<\/td><\/tr>\n <tr><td>Y \/ Z minimum feed<\/td><td>0.01 mm<\/td><\/tr>\n <tr><td>Y \/ Z repeatability<\/td><td>\u00b10.01 mm<\/td><\/tr>\n <tr><td>Cutting \/ manual speed<\/td><td>0\u20131000 mm\/min (adjustable)<\/td><\/tr>\n <tr><td>Rotary table<\/td><td>Yes \u2014 prism \/ polygon, any angle<\/td><\/tr>\n <tr><td>Drive motor power<\/td><td>1.5 kW<\/td><\/tr>\n <tr><td>Power supply<\/td><td>220 V, three-phase<\/td><\/tr>\n <tr><td>Dimensions (L\u00d7W\u00d7H)<\/td><td>~1044 \u00d7 943 \u00d7 1970 mm<\/td><\/tr>\n <tr><td>Weight<\/td><td>~680 kg<\/td><\/tr>\n <tr><td>Cooling<\/td><td>Tank + recirculation + mist recovery<\/td><\/tr>\n <\/tbody><\/table>\n <p>Read cut-blank tolerances against your finished-lens drawing per <a href=\"https:\/\/www.iso.org\/standard\/79655.html\" target=\"_blank\" rel=\"noopener noreferrer\">ISO 10110<\/a> \u2014 the centering and grinding stages inherit whatever the cut leaves them.<\/p>\n <figure class=\"photo\">\n <img decoding=\"async\" src=\"images\/germanium-lens-blank-cutting-machine-sgr40.jpg\" alt=\"germanium lens blank cutting machine SGR40 with rotary worktable\" width=\"1200\" height=\"600\" onerror=\"this.style.display='none';this.parentNode.querySelector('figcaption').textContent='[ Product photo placeholder \u2014 upload images\/germanium-lens-blank-cutting-machine-sgr40.jpg on deploy; alt text already set. ]';\" title=\"Vimfun glass cutting equipment is a perfect machine tool for precision cutting\">\n <figcaption>SGR40 germanium lens blank cutting machine \u2014 rotary worktable configuration.<\/figcaption>\n <\/figure>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Materials<\/div><h2>Which brittle IR materials can it cut?<\/h2><\/div>\n <div>\n <p>The wire cuts anything softer than diamond, so the SGR40 isn't germanium-only. We've run the following on the same platform, each with its own parameter set:<\/p>\n <ul class=\"clean\">\n <li><strong>Germanium (Ge)<\/strong> \u2014 0.35\u20130.5 mm wire, 100\u2013140 N tension, white mineral oil<\/li>\n <li><strong>Silicon (Si)<\/strong> \u2014 mature, 0.42\u20130.5 mm wire<\/li>\n <li><strong>Zinc selenide (ZnSe)<\/strong> & <strong>zinc sulfide (ZnS)<\/strong> \u2014 CO\u2082 laser and multispectral optics<\/li>\n <li><strong>Sapphire<\/strong> \u2014 0.5\u20130.65 mm wire<\/li>\n <li><strong>Optical glass (BK7 \/ K9)<\/strong> & <strong>fused quartz<\/strong><\/li>\n <\/ul>\n <p>Cutting something not on the list \u2014 chalcogenide glass, a specialty ceramic? Send a sample and we'll test-cut it before quoting parameters. We don't guess on materials we haven't run.<\/p>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Production line<\/div><h2>Where it fits in a germanium lens line<\/h2><\/div>\n <div>\n <p>The SGR40 germanium lens blank cutting machine is the front end. It turns ingots into blanks; everything after \u2014 edge centering, spherical grinding, polishing, AR coating \u2014 works from the blank it produces. Because the wire leaves a consistent TTV and a low-damage surface, the downstream fixtures set up against known inputs instead of re-tuning every batch.<\/p>\n <p>Building the whole chain rather than just the cutting station? The <a href=\"https:\/\/www.opticalcutting.com\/germanium-lens-manufacturing\/\">germanium lens manufacturing<\/a> solution page lays out the five-stage workflow and how the tolerance budget flows station to station. For the full equipment range, start at the <a href=\"https:\/\/www.opticalcutting.com\/\">infrared optics manufacturing equipment<\/a> hub.<\/p>\n <div class=\"note\"><div class=\"t\">When to pick a different machine<\/div><p>The SGR40 does straight slices and rotary-indexed prisms \u2014 not free-form CAD contours (crescents, arbitrary curves); that's the SGI contour series. And if you only ever need round slices, the slicing-only <a href=\"https:\/\/www.opticalcutting.com\/germanium-wafer-slicing-machine\/\">germanium wafer slicing machine<\/a> (SG40) is the cheaper choice. The rotary axis earns its keep only if you cut prisms or polygons.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"cta\" id=\"quote\">\n <div class=\"wrap cta-inner\">\n <div>\n <div class=\"eyebrow\">Next step<\/div>\n <h2>Get a sample cut on your own germanium<\/h2>\n <p>Pick the SGR40 germanium lens blank cutting machine if your work mixes round blanks with prism or polygonal blanks and you want to stop losing material to wide kerf. Send your ingot diameter and length, target geometry, and monthly volume \u2014 we'll run a free test cut before you commit.<\/p>\n <\/div>\n <div>\n <a class=\"btn\" href=\"mailto:daria@endlesswiresaw.com?subject=SGR40%20germanium%20lens%20blank%20cutting%20machine%20\u2014%20sample%20cut%20request\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\"><path d=\"M5 12h14M13 6l6 6-6 6\"\/><\/svg>Request a sample cut & quote<\/a>\n <p class=\"trust\"><b>Vimfun<\/b> \u00b7 ISO 9001 \u00b7 CE compliant \u00b7 shipped to 20+ countries<br>\n Optics customers include Edmund Optics and Coherent.<br>\n Tel +1 (408) 571-8651 \u00b7 <a href=\"mailto:daria@endlesswiresaw.com\">daria@endlesswiresaw.com<\/a><\/p>\n <\/div>\n <\/div>\n<\/section>\n\n\n<\/body>\n<\/html>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Germanium Lens Blank Cutting Machine: Round, Square & Prism Blanks SGR40 \u00b7 Endless Diamond Wire Saw Germanium Lens Blank Cutting Machine One machine that slices round blanks and prism-cuts polygons from germanium ingots \u2014 at a closed-loop wire kerf near 0.5 mm, so you keep the expensive material instead of grinding it into slurry. ~0.5 mmWire kerf 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\n\t\t\t\t\t\n\n\n\n\nGermanium Lens Blank Cutting Machine: Round, Square & Prism Blanks<\/title>\n<meta name=\"description\" content=\"The SGR40 germanium lens blank cutting machine slices and prism-cuts Ge ingots into round, square and polygonal blanks at ~0.5 mm kerf. 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.play{transform:scale(1.06);background:var(--blue-dark)}\n .video-ph .play svg{width:24px;height:24px;fill:#fff;margin-left:3px}\n .video-ph .t{position:absolute;bottom:14px;left:0;right:0;text-align:center;font-family:var(--mono);font-size:11px;color:var(--blue-deep);font-weight:600;padding:0 12px}\n .rise{opacity:0;transform:translateY(14px);animation:rise .7s cubic-bezier(.2,.7,.2,1) forwards}\n .d1{animation-delay:.04s}.d2{animation-delay:.12s}.d3{animation-delay:.2s}.d4{animation-delay:.28s}.d5{animation-delay:.36s}\n @keyframes rise{to{opacity:1;transform:none}}\n @media(prefers-reduced-motion:reduce){.rise{animation:none;opacity:1;transform:none}}\n .geo *{vector-effect:non-scaling-stroke}\n<\/style>\n<\/head>\n<body>\n\n<section class=\"hero\">\n <div class=\"wrap\">\n <div>\n <div class=\"model-line rise d1\">SGR40 \u00b7 Endless Diamond Wire Saw<\/div>\n <h1 class=\"rise d2\">Germanium Lens Blank Cutting Machine<\/h1>\n <p class=\"lede rise d2\">One machine that <strong>slices round blanks<\/strong> and <strong>prism-cuts polygons<\/strong> from germanium ingots \u2014 at a closed-loop wire kerf near 0.5 mm, so you keep the expensive material instead of grinding it into slurry.<\/p>\n <div class=\"chips rise d3\">\n <div class=\"chip\"><div class=\"v\">~0.5<small> mm<\/small><\/div><div class=\"l\">Wire kerf<\/div><\/div>\n <div class=\"chip\"><div class=\"v\">\u00b10.01<small> mm<\/small><\/div><div class=\"l\">Repeatability<\/div><\/div>\n <div class=\"chip\"><div class=\"v\">\u00d8380<small> mm<\/small><\/div><div class=\"l\">Worktable<\/div><\/div>\n <div class=\"chip\"><div class=\"v\">59<small> m\/s<\/small><\/div><div class=\"l\">Max wire speed<\/div><\/div>\n <\/div>\n <div class=\"hero-actions rise d4\">\n <a class=\"btn\" href=\"#quote\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\"><path d=\"M5 12h14M13 6l6 6-6 6\"\/><\/svg>Get a sample cut<\/a>\n <a class=\"btn btn-ghost\" href=\"#video\">Watch it cut<\/a>\n <\/div>\n <\/div>\n <div class=\"hero-visual rise d3\">\n <div class=\"vhead\"><span>FIG.01 \u2014 ROTARY-AXIS PRISM CUT<\/span><b>SGR40<\/b><\/div>\n <div class=\"vbody\">\n <svg class=\"geo\" viewBox=\"0 0 460 290\" width=\"100%\" role=\"img\" aria-label=\"SGR40 rotary worktable indexing a germanium cylinder into an octagonal blank with a 0.5 mm wire kerf callout\">\n <defs><marker id=\"ar\" markerWidth=\"9\" markerHeight=\"9\" refX=\"6\" refY=\"4.2\" orient=\"auto\"><path d=\"M0 0 L9 4.2 L0 8.4 z\" fill=\"#0274BE\"\/><\/marker><\/defs>\n <circle cx=\"150\" cy=\"150\" r=\"92\" fill=\"none\" stroke=\"#B8DBEF\" stroke-width=\"1.4\" stroke-dasharray=\"3 5\"\/>\n <circle cx=\"150\" cy=\"150\" r=\"6\" fill=\"#14202C\"\/>\n <circle cx=\"150\" cy=\"150\" r=\"72\" fill=\"#D5E8F6\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <polygon points=\"150,82 197,101 216,150 197,199 150,218 103,199 84,150 103,101\" fill=\"rgba(2,116,190,.16)\" stroke=\"#0274BE\" stroke-width=\"2.2\"\/>\n <path d=\"M150 60 A90 90 0 0 1 236 120\" fill=\"none\" stroke=\"#0274BE\" stroke-width=\"1.7\" marker-end=\"url(#ar)\"\/>\n <text x=\"246\" y=\"84\" font-family=\"IBM Plex Mono\" font-size=\"12\" fill=\"#015A93\">index \u03b8<\/text>\n <line x1=\"300\" y1=\"34\" x2=\"300\" y2=\"266\" stroke=\"#14202C\" stroke-width=\"2\"\/>\n <text x=\"308\" y=\"44\" font-family=\"IBM Plex Mono\" font-size=\"11\" fill=\"#4E5C72\">\u00d80.4 mm wire<\/text>\n <line x1=\"216\" y1=\"150\" x2=\"296\" y2=\"150\" stroke=\"#0274BE\" stroke-width=\"1\" stroke-dasharray=\"2 3\"\/>\n <line x1=\"296\" y1=\"138\" x2=\"304\" y2=\"138\" stroke=\"#0274BE\" stroke-width=\"1.4\"\/>\n <line x1=\"296\" y1=\"162\" x2=\"304\" y2=\"162\" stroke=\"#0274BE\" stroke-width=\"1.4\"\/>\n <text x=\"316\" y=\"156\" font-family=\"IBM Plex Mono\" font-size=\"12\" fill=\"#015A93\">kerf \u2248 0.5<\/text>\n <text x=\"352\" y=\"210\" font-family=\"IBM Plex Mono\" font-size=\"11\" fill=\"#4E5C72\">3\u00b74\u00b75\u00b78\u00b79-gon<\/text>\n <text x=\"352\" y=\"226\" font-family=\"IBM Plex Mono\" font-size=\"11\" fill=\"#4E5C72\">one setup<\/text>\n <\/svg>\n <\/div>\n <div class=\"vcap\">Rotary table indexes the workpiece between cuts \u2014 round stock to triangle, square, pentagon, octagon or nonagon without re-clamping.<\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">The Machine<\/div>\n <h2>A fully enclosed upright wire saw<\/h2>\n <p>Steel frame, observation window, side touchscreen \u2014 built to keep coolant mist and swarf contained on a working shop floor.<\/p>\n <\/div>\n <div class=\"video-wrap\">\n <figure class=\"shot\">\n <img fetchpriority=\"high\" decoding=\"async\" src=\"images\/sgr40-germanium-lens-blank-cutting-machine.jpg\" alt=\"SGR40 germanium lens blank cutting machine front view\" width=\"1100\" height=\"770\" onerror=\"this.style.display='none';this.nextElementSibling.classList.add('show')\" title=\"Vimfun glass cutting equipment is a perfect machine tool for precision cutting\">\n <div class=\"ph\">\n <svg viewBox=\"0 0 460 320\" role=\"img\" aria-label=\"SGR40 germanium lens blank cutting machine \u2014 enclosed upright frame with observation window and touchscreen\">\n <rect x=\"0\" y=\"0\" width=\"460\" height=\"320\" fill=\"none\"\/>\n \n <rect x=\"118\" y=\"252\" width=\"232\" height=\"44\" rx=\"6\" fill=\"#015A93\"\/>\n <rect x=\"136\" y=\"296\" width=\"26\" height=\"16\" fill=\"#14202C\"\/>\n <rect x=\"306\" y=\"296\" width=\"26\" height=\"16\" fill=\"#14202C\"\/>\n \n <rect x=\"110\" y=\"42\" width=\"248\" height=\"214\" rx=\"12\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"2.2\"\/>\n \n <rect x=\"134\" y=\"70\" width=\"150\" height=\"150\" rx=\"8\" fill=\"#D5E8F6\" stroke=\"#0274BE\" stroke-width=\"1.6\"\/>\n \n <circle cx=\"170\" cy=\"104\" r=\"16\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <circle cx=\"248\" cy=\"104\" r=\"16\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <circle cx=\"209\" cy=\"190\" r=\"13\" fill=\"#fff\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n <path d=\"M170 120 L209 177 M248 120 L209 177 M170 88 Q209 70 248 88\" fill=\"none\" stroke=\"#0274BE\" stroke-width=\"1.8\"\/>\n \n <circle cx=\"209\" cy=\"150\" r=\"15\" fill=\"rgba(2,116,190,.18)\" stroke=\"#015A93\" stroke-width=\"1.6\"\/>\n \n <rect x=\"300\" y=\"92\" width=\"44\" height=\"64\" rx=\"5\" fill=\"#14202C\"\/>\n <rect x=\"306\" y=\"100\" width=\"32\" height=\"34\" rx=\"2\" fill=\"#0274BE\"\/>\n <line x1=\"306\" y1=\"142\" x2=\"338\" y2=\"142\" stroke=\"#2685C8\" stroke-width=\"2\"\/>\n <line x1=\"306\" y1=\"148\" x2=\"326\" y2=\"148\" stroke=\"#2685C8\" stroke-width=\"2\"\/>\n \n <text x=\"134\" y=\"244\" font-family=\"Sora,sans-serif\" font-weight=\"800\" font-size=\"15\" fill=\"#015A93\">SGR40<\/text>\n <text x=\"250\" y=\"244\" font-family=\"IBM Plex Mono\" font-size=\"10\" fill=\"#4E5C72\">ENDLESS WIRE<\/text>\n <\/svg>\n <div style=\"font-family:var(--mono);font-size:10.5px;color:var(--ink-soft);padding:9px 14px;background:var(--white);border-top:1px solid var(--line)\">[ Illustration placeholder \u2014 upload images\/sgr40-germanium-lens-blank-cutting-machine.jpg on deploy ]<\/div>\n <\/div>\n <figcaption>SGR40 \u2014 enclosed upright frame, observation window, side-mounted touchscreen.<\/figcaption>\n <\/figure>\n <div>\n <p>The SGR40 germanium lens blank cutting machine ships as a fully enclosed upright unit. The cabinet keeps coolant mist and swarf contained, and the observation window lets the operator watch the diamond wire and rotary fixture during a cut \u2014 useful when you're proving out a new prism angle.<\/p>\n <ul class=\"build-list\">\n <li><b>Footprint<\/b> ~1044 \u00d7 943 mm \u00b7 height ~1970 mm<\/li>\n <li><b>Weight<\/b> ~680 kg \u2014 rigid frame for low vibration<\/li>\n <li><b>Interface<\/b> side touchscreen + handheld controller<\/li>\n <li><b>Cooling<\/b> recirculating coolant with mist recovery<\/li>\n <li><b>Power<\/b> 220 V three-phase \u00b7 1.5 kW<\/li>\n <\/ul>\n <a class=\"btn btn-ghost\" href=\"#quote\">Request the full spec sheet<\/a>\n <\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">Key Features<\/div>\n <h2>What the SGR40 germanium lens blank cutting machine does<\/h2>\n <p>Two motions \u2014 a servo YZ slicing stage and a programmable rotary table \u2014 give you round blanks and multi-faceted prism blanks from a single setup.<\/p>\n <\/div>\n <div class=\"feat-grid\">\n <div class=\"feat\"><div class=\"num\">1<\/div><h3>Multi-angle prism & polygon cutting<\/h3><p>The rotary worktable indexes to any angle and produces triangles, squares, pentagons, octagons or nonagons \u2014 multi-faceted germanium blanks without re-clamping.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">2<\/div><h3>Automatic round-blank slicing<\/h3><p>Set thickness and quantity on the touchscreen; the machine slices a Ge cylinder into discs unattended, and supports different thicknesses inside one job.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">3<\/div><h3>~0.5 mm closed-loop kerf<\/h3><p>The endless diamond wire keeps the kerf near wire diameter \u2014 roughly $200\u2013$600 of germanium saved per ingot versus a core drill.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">4<\/div><h3>Servo YZ motion, \u00b10.01 mm<\/h3><p>Linear guides and ball screws on both axes give 0.01 mm feed resolution and \u00b10.01 mm repeatability for consistent blank thickness.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">5<\/div><h3>Enclosed frame + PLC touchscreen<\/h3><p>Steel frame with an observation window, English-language PLC, and a handheld controller for manual alignment and override.<\/p><\/div>\n <div class=\"feat\"><div class=\"num\">6<\/div><h3>Water cooling + auto lubrication<\/h3><p>Recirculating coolant with mist recovery and an automatic oiling system keep the cut clean and maintenance low.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section id=\"video\">\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">Videos<\/div>\n <h2>See the SGR40 rotary wire saw in action<\/h2>\n <p>This walkthrough shows how the germanium lens blank cutting machine pairs an endless diamond wire with the programmable rotary worktable. Watch the servo-driven YZ axes, automatic tension control, and the rotating fixture index a workpiece between cuts to build a clean polygon in one program.<\/p>\n <\/div>\n <div class=\"vid-2\">\n <div class=\"vid-item\">\n <div class=\"video-frame\">\n <iframe src=\"https:\/\/www.youtube.com\/embed\/6DD97_LPO3c\" title=\"SGR40 germanium lens blank cutting machine \u2014 working principle\"\n loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n <\/div>\n <p class=\"cap\">\u25b8 Working principle \u2014 rotary prism & polygon cutting<\/p>\n <\/div>\n <div class=\"vid-item\">\n <a class=\"video-ph\" href=\"https:\/\/www.youtube.com\/@endlessdiamondwireloop\" target=\"_blank\" rel=\"noopener noreferrer\" aria-label=\"Slicing function demo video\">\n <span class=\"play\"><svg viewBox=\"0 0 24 24\"><path d=\"M8 5v14l11-7z\"\/><\/svg><\/span>\n <span class=\"t\">Slicing function demo \u2014 paste your YouTube embed ID here on deploy<\/span>\n <\/a>\n <p class=\"cap\">\u25b8 Slicing function \u2014 automatic round Ge blanks<\/p>\n <\/div>\n <\/div>\n <p style=\"color:var(--ink-soft);font-size:15px;margin-top:18px\">Material in the working-principle clip is optical glass; germanium runs at a lower wire speed (30\u201345 m\/s), but the motion sequence is identical. <a href=\"#quote\">Request a germanium sample cut \u2192<\/a><\/p>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">The Cost Driver<\/div><h2>Why germanium kerf loss is the real number<\/h2><\/div>\n <div>\n <p>A 200 mm germanium ingot is worth $6,000 to $10,000 at today's $1,800\u2013$2,400\/kg spot price. Run that ingot through a core drill and you lose 30\u201340% of it to kerf and edge chipping before a single surface is ground. The SGR40 germanium lens blank cutting machine goes straight at that loss with a closed-loop kerf near 0.5 mm.<\/p>\n <p>The math we run for customers is simple. A core drill removes an entire cylindrical shell on every cut \u2014 typical bit kerf is 5 to 10 mm. Push that through a $2,200\/kg ingot and you waste $11\u2013$15 of germanium per cut. An ID saw does better on kerf (0.3\u20130.5 mm) but leaves a 30\u201380 \u00b5m subsurface damage layer the polisher grinds away later, plus concentric blade marks as the blade wears.<\/p>\n <p>A closed-loop diamond wire runs unidirectionally, so there's no reversing pattern, the abrasive face refreshes as the loop circulates, and the kerf stays near the wire diameter. For germanium we run 0.35\u20130.5 mm wire, landing the kerf around 0.5 mm \u2014 <span class=\"hl\">$200\u2013$600 of germanium kept per ingot<\/span>. The process detail is on our <a href=\"https:\/\/www.opticalcutting.com\/germanium-lens-blank-cutting\/\">germanium lens blank cutting<\/a> page.<\/p>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Two jobs, one setup<\/div><h2>Round blanks and prism blanks<\/h2><\/div>\n <div>\n <h3>Round lens blanks (puck slicing)<\/h3>\n <p>Program slice thickness and quantity, and the machine slices a germanium cylinder into discs automatically \u2014 mixing, say, 8 mm lens blanks and 3 mm window blanks in one run off the same rod. Cut surfaces come off the wire at Ra 0.6\u20131.2 \u00b5m with TTV around 8\u201315 \u00b5m over a 50 mm disc, flat enough that the grinder can usually skip a rough pass.<\/p>\n <h3 style=\"margin-top:22px\">Square, polygonal and prism blanks<\/h3>\n <p>Enter a prism angle and the rotary table indexes the workpiece between cuts \u2014 triangle, square, pentagon, octagon or nonagon, in one setup. For beam-folding prisms, square window blanks, or polygonal blanks ground into non-circular optics, this avoids the wasteful \"cut an oversized square, then grind it round\" route that throws away germanium and chips at the corners.<\/p>\n <div class=\"note warn\"><div class=\"t\">\u26a0 Setup gotcha<\/div><p>Center the rotary table on the workpiece OD with a dial indicator before the first cut, or the polygon comes out asymmetric. Basic \u2014 but skip it and you'll scrap the first blank.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Comparison<\/div><h2>How does the 0.5 mm kerf compare to core drilling and ID saws?<\/h2><\/div>\n <div>\n <p>Short version: the wire wins on material yield and surface quality; it loses on raw parts-per-hour against a multi-wire saw. Here's the honest comparison for germanium.<\/p>\n <table class=\"tbl\">\n <thead><tr><th>Method<\/th><th>Kerf<\/th><th>Edge chipping<\/th><th>Subsurface<\/th><th>Pcs\/cut<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Core drill<\/td><td>5\u201310 mm<\/td><td>0.3\u20130.8 mm<\/td><td>high<\/td><td>1<\/td><\/tr>\n <tr><td>ID saw<\/td><td>0.3\u20130.5 mm<\/td><td>moderate<\/td><td>30\u201380 \u00b5m<\/td><td>1<\/td><\/tr>\n <tr><td class=\"hl\">SGR40 closed-loop wire<\/td><td class=\"hl\">~0.5 mm<\/td><td class=\"hl\">< 0.1 mm<\/td><td class=\"hl\">low<\/td><td>1<\/td><\/tr>\n <\/tbody>\n <\/table>\n <p>A 0.1 mm edge chip on the cut blank means the centering machine takes a 0.1 mm stock allowance instead of 0.5 mm \u2014 less germanium ground off, fewer passes. In our experience that downstream effect is bigger than the cutting-stage saving people focus on first.<\/p>\n <div class=\"note\"><div class=\"t\">Fair warning on speed<\/div><p>The spec lists max wire speed at 59 m\/s, but we run germanium at 30\u201345 m\/s, feed 10\u201320 mm\/min for slicing (4\u20138 mm\/min on prism paths). Germanium cleaves on the {111} plane \u2014 it punishes aggressive feeds. Full material data is in <a href=\"https:\/\/www.crystran.co.uk\/optical-materials\/germanium-ge\" target=\"_blank\" rel=\"noopener noreferrer\">Crystran's germanium datasheet<\/a>.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap\">\n <div class=\"sec-head\">\n <div class=\"eyebrow\">Engineering Highlights<\/div>\n <h2>Built for high-value brittle optics<\/h2>\n <p>The features that matter when the material on the table costs more than the cut.<\/p>\n <\/div>\n <div class=\"hl-grid\">\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M12 3v18M5 8l7-5 7 5\"\/><\/svg><\/div><div><div class=\"v\">Up to 59 m\/s wire<\/div><div class=\"d\">High closed-loop linear speed for clean, fast cuts.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><circle cx=\"12\" cy=\"12\" r=\"8\"\/><path d=\"M12 8v4l3 2\"\/><\/svg><\/div><div><div class=\"v\">\u00b10.01 mm repeatability<\/div><div class=\"d\">Servo YZ on linear guides and ball screws.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M4 18 L9 7 l3 6 3-9 5 14\"\/><\/svg><\/div><div><div class=\"v\">< 0.1 mm chipping<\/div><div class=\"d\">Low-stress wire cut on germanium edges.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M3 7h18M3 12h18M3 17h18\"\/><\/svg><\/div><div><div class=\"v\">Multi-material<\/div><div class=\"d\">Ge, ZnSe, ZnS, silicon, sapphire, optical glass.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M5 12l5 5 9-11\"\/><\/svg><\/div><div><div class=\"v\">Free sample cut<\/div><div class=\"d\">Send your material and drawing; we cut a proof.<\/div><\/div><\/div>\n <div class=\"hl-card\"><div class=\"ic\"><svg viewBox=\"0 0 24 24\"><path d=\"M12 3l8 4v6c0 4-3 7-8 8-5-1-8-4-8-8V7z\"\/><\/svg><\/div><div><div class=\"v\">1-year warranty<\/div><div class=\"d\">Plus remote support and user-replaceable wire.<\/div><\/div><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Datasheet<\/div><h2>SGR40 technical specifications<\/h2><\/div>\n <div>\n <p>Standard-configuration numbers for the SGR40 germanium lens blank cutting machine. Worktable and travel can be customized for larger ingots.<\/p>\n <table class=\"tbl datasheet\"><tbody>\n <tr><td>Worktable size<\/td><td>\u00d8 380 mm<\/td><\/tr>\n <tr><td>Max workpiece height<\/td><td>280 mm<\/td><\/tr>\n <tr><td>Y \/ Z axis travel<\/td><td>380 mm \/ 380 mm<\/td><\/tr>\n <tr><td>Diamond wire diameter<\/td><td>0.35\u20131.0 mm<\/td><\/tr>\n <tr><td>Max wire linear speed<\/td><td>59 m\/s<\/td><\/tr>\n <tr><td>Y \/ Z minimum feed<\/td><td>0.01 mm<\/td><\/tr>\n <tr><td>Y \/ Z repeatability<\/td><td>\u00b10.01 mm<\/td><\/tr>\n <tr><td>Cutting \/ manual speed<\/td><td>0\u20131000 mm\/min (adjustable)<\/td><\/tr>\n <tr><td>Rotary table<\/td><td>Yes \u2014 prism \/ polygon, any angle<\/td><\/tr>\n <tr><td>Drive motor power<\/td><td>1.5 kW<\/td><\/tr>\n <tr><td>Power supply<\/td><td>220 V, three-phase<\/td><\/tr>\n <tr><td>Dimensions (L\u00d7W\u00d7H)<\/td><td>~1044 \u00d7 943 \u00d7 1970 mm<\/td><\/tr>\n <tr><td>Weight<\/td><td>~680 kg<\/td><\/tr>\n <tr><td>Cooling<\/td><td>Tank + recirculation + mist recovery<\/td><\/tr>\n <\/tbody><\/table>\n <p>Read cut-blank tolerances against your finished-lens drawing per <a href=\"https:\/\/www.iso.org\/standard\/79655.html\" target=\"_blank\" rel=\"noopener noreferrer\">ISO 10110<\/a> \u2014 the centering and grinding stages inherit whatever the cut leaves them.<\/p>\n <figure class=\"photo\">\n <img decoding=\"async\" src=\"images\/germanium-lens-blank-cutting-machine-sgr40.jpg\" alt=\"germanium lens blank cutting machine SGR40 with rotary worktable\" width=\"1200\" height=\"600\" onerror=\"this.style.display='none';this.parentNode.querySelector('figcaption').textContent='[ Product photo placeholder \u2014 upload images\/germanium-lens-blank-cutting-machine-sgr40.jpg on deploy; alt text already set. ]';\" title=\"Vimfun glass cutting equipment is a perfect machine tool for precision cutting\">\n <figcaption>SGR40 germanium lens blank cutting machine \u2014 rotary worktable configuration.<\/figcaption>\n <\/figure>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section>\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Materials<\/div><h2>Which brittle IR materials can it cut?<\/h2><\/div>\n <div>\n <p>The wire cuts anything softer than diamond, so the SGR40 isn't germanium-only. We've run the following on the same platform, each with its own parameter set:<\/p>\n <ul class=\"clean\">\n <li><strong>Germanium (Ge)<\/strong> \u2014 0.35\u20130.5 mm wire, 100\u2013140 N tension, white mineral oil<\/li>\n <li><strong>Silicon (Si)<\/strong> \u2014 mature, 0.42\u20130.5 mm wire<\/li>\n <li><strong>Zinc selenide (ZnSe)<\/strong> & <strong>zinc sulfide (ZnS)<\/strong> \u2014 CO\u2082 laser and multispectral optics<\/li>\n <li><strong>Sapphire<\/strong> \u2014 0.5\u20130.65 mm wire<\/li>\n <li><strong>Optical glass (BK7 \/ K9)<\/strong> & <strong>fused quartz<\/strong><\/li>\n <\/ul>\n <p>Cutting something not on the list \u2014 chalcogenide glass, a specialty ceramic? Send a sample and we'll test-cut it before quoting parameters. We don't guess on materials we haven't run.<\/p>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"band\">\n <div class=\"wrap twocol\">\n <div class=\"lab\"><div class=\"eyebrow\">Production line<\/div><h2>Where it fits in a germanium lens line<\/h2><\/div>\n <div>\n <p>The SGR40 germanium lens blank cutting machine is the front end. It turns ingots into blanks; everything after \u2014 edge centering, spherical grinding, polishing, AR coating \u2014 works from the blank it produces. Because the wire leaves a consistent TTV and a low-damage surface, the downstream fixtures set up against known inputs instead of re-tuning every batch.<\/p>\n <p>Building the whole chain rather than just the cutting station? The <a href=\"https:\/\/www.opticalcutting.com\/germanium-lens-manufacturing\/\">germanium lens manufacturing<\/a> solution page lays out the five-stage workflow and how the tolerance budget flows station to station. For the full equipment range, start at the <a href=\"https:\/\/www.opticalcutting.com\/\">infrared optics manufacturing equipment<\/a> hub.<\/p>\n <div class=\"note\"><div class=\"t\">When to pick a different machine<\/div><p>The SGR40 does straight slices and rotary-indexed prisms \u2014 not free-form CAD contours (crescents, arbitrary curves); that's the SGI contour series. And if you only ever need round slices, the slicing-only <a href=\"https:\/\/www.opticalcutting.com\/germanium-wafer-slicing-machine\/\">germanium wafer slicing machine<\/a> (SG40) is the cheaper choice. The rotary axis earns its keep only if you cut prisms or polygons.<\/p><\/div>\n <\/div>\n <\/div>\n<\/section>\n\n\n<section class=\"cta\" id=\"quote\">\n <div class=\"wrap cta-inner\">\n <div>\n <div class=\"eyebrow\">Next step<\/div>\n <h2>Get a sample cut on your own germanium<\/h2>\n <p>Pick the SGR40 germanium lens blank cutting machine if your work mixes round blanks with prism or polygonal blanks and you want to stop losing material to wide kerf. Send your ingot diameter and length, target geometry, and monthly volume \u2014 we'll run a free test cut before you commit.<\/p>\n <\/div>\n <div>\n <a class=\"btn\" href=\"mailto:daria@endlesswiresaw.com?subject=SGR40%20germanium%20lens%20blank%20cutting%20machine%20\u2014%20sample%20cut%20request\"><svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\"><path d=\"M5 12h14M13 6l6 6-6 6\"\/><\/svg>Request a sample cut & quote<\/a>\n <p class=\"trust\"><b>Vimfun<\/b> \u00b7 ISO 9001 \u00b7 CE compliant \u00b7 shipped to 20+ countries<br>\n Optics customers include Edmund Optics and Coherent.<br>\n Tel +1 (408) 571-8651 \u00b7 <a href=\"mailto:daria@endlesswiresaw.com\">daria@endlesswiresaw.com<\/a><\/p>\n <\/div>\n <\/div>\n<\/section>\n\n\n<\/body>\n<\/html>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Germanium Lens Blank Cutting Machine: Round, Square & Prism Blanks SGR40 \u00b7 Endless Diamond Wire Saw Germanium Lens Blank Cutting Machine One machine that slices round blanks and prism-cuts polygons from germanium ingots \u2014 at a closed-loop wire kerf near 0.5 mm, so you keep the expensive material instead of grinding it into slurry. ~0.5 mmWire kerf 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