{"product_id":"gt2-timing-pulley-16-20-30-36-40-teeth","title":"GT2 Timing Pulleys for 3D Printers, 16 \/ 20 \/ 30 \/ 36 \/ 40 Teeth, 5 mm or 8 mm Bore, 6 mm Belt, Aluminium (Multi-Packs)","description":"\u003cp\u003e\u003cstrong\u003eGT2 timing pulleys are toothed aluminium wheels with a 2 mm pitch that transfer motion from a stepper motor shaft to a 6 mm GT2 belt, used on the X, Y and Z axes of 3D printers, CoreXY machines, laser engravers, plotters and small CNC routers.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePrecision-machined aluminium GT2 timing pulleys for the X, Y and Z axes of 3D printers, CoreXY and CNC builds. 16 and 20-tooth pulleys with a 5 mm bore fit NEMA 17 motor shafts directly; 8 mm bore versions suit lead screws and idler shafts; 30, 36 and 40-tooth pulleys are used for reduction drives and belt-driven Z axes. Each pulley has two flanges to keep the belt on and two M3 grub screws.\u003c\/p\u003e\u003ch2\u003eWhat can you use it for?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing worn or stripped motor pulleys on Ender 3, Prusa, Voron, Bambu-style and RepRap printers\u003c\/li\u003e\n\u003cli\u003eBuilding CoreXY, H-bot and belt-driven Z-axis motion systems\u003c\/li\u003e\n\u003cli\u003eReduction drives: pair a 16T or 20T motor pulley with a 30T, 36T or 40T driven pulley\u003c\/li\u003e\n\u003cli\u003eLaser engravers, pen plotters, camera sliders and belt-driven linear actuators\u003c\/li\u003e\n\u003cli\u003e8 mm bore versions for lead screws, idler shafts and larger motors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho is it for?\u003c\/h2\u003e\u003cp\u003e3D-printer owners doing repairs or upgrades, CoreXY and CNC builders, and makers who want spare pulleys on hand in the sizes that actually get used.\u003c\/p\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBelts: GT2 \/ 2GT 6 mm wide, open-end or closed loop, 2 mm pitch (not GT3 or MXL)\u003c\/li\u003e\n\u003cli\u003eShafts: 5 mm bore fits NEMA 17 stepper motors; 8 mm bore fits 8 mm lead screws and shafts\u003c\/li\u003e\n\u003cli\u003eFixing: two M3 grub screws per pulley, 1.5 mm hex key\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProfile\u003c\/th\u003e\n\u003ctd\u003eGT2 \/ 2GT, 2 mm pitch, for 6 mm wide belts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTeeth options\u003c\/th\u003e\n\u003ctd\u003e16, 20, 30, 36, 40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore options\u003c\/th\u003e\n\u003ctd\u003e5 mm (NEMA 17 shaft) or 8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminium alloy, anodised silver or black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFixing\u003c\/th\u003e\n\u003ctd\u003eTwo M3 grub screws (hex key supplied by user)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e16T dimensions\u003c\/th\u003e\n\u003ctd\u003eØ13 mm flange, 10 mm pitch diameter, 14 mm total height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e20T dimensions\u003c\/th\u003e\n\u003ctd\u003eØ16 mm flange, 12 mm pitch diameter, 16 mm total height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible belts\u003c\/th\u003e\n\u003ctd\u003eGT2 6 mm open-end and closed-loop belts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003ctd\u003e5 pieces (16T \/ 20T) or 2 pieces (30T \/ 36T \/ 40T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16T, 5 mm bore, silver (5-pack):\u003c\/strong\u003e 5 × GT2 16-tooth pulleys, 5 mm bore, silver, grub screws fitted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16T, 5 mm bore, black (5-pack):\u003c\/strong\u003e 5 × GT2 16-tooth pulleys, 5 mm bore, black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20T, 5 mm bore, silver (5-pack):\u003c\/strong\u003e 5 × GT2 20-tooth pulleys, 5 mm bore, silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20T, 5 mm bore, black (5-pack):\u003c\/strong\u003e 5 × GT2 20-tooth pulleys, 5 mm bore, black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20T, 8 mm bore, silver (5-pack):\u003c\/strong\u003e 5 × GT2 20-tooth pulleys, 8 mm bore, silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20T, 8 mm bore, black (5-pack):\u003c\/strong\u003e 5 × GT2 20-tooth pulleys, 8 mm bore, black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30T, 5 mm bore, silver (2-pack):\u003c\/strong\u003e 2 × GT2 30-tooth pulleys, 5 mm bore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30T, 8 mm bore, silver (2-pack):\u003c\/strong\u003e 2 × GT2 30-tooth pulleys, 8 mm bore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e36T, 5 mm bore, silver (2-pack):\u003c\/strong\u003e 2 × GT2 36-tooth pulleys, 5 mm bore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e36T, 8 mm bore, silver (2-pack):\u003c\/strong\u003e 2 × GT2 36-tooth pulleys, 8 mm bore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40T, 5 mm bore, silver (2-pack):\u003c\/strong\u003e 2 × GT2 40-tooth pulleys, 5 mm bore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40T, 8 mm bore, silver (2-pack):\u003c\/strong\u003e 2 × GT2 40-tooth pulleys, 8 mm bore\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eWhich pulley does my 3D printer use?\u003c\/h3\u003e\u003cp\u003eMost desktop printers (Ender 3, CR-10, Prusa i3 clones, many CoreXY kits) use a 20-tooth GT2 pulley with a 5 mm bore on the NEMA 17 motor. Voron and some compact builds use 16 teeth. Count the teeth on your old pulley or check your printer's firmware steps\/mm: 80 steps\/mm at 16 microsteps means 20T, 100 steps\/mm means 16T.\u003c\/p\u003e\u003ch3\u003eDo I need to change firmware after swapping pulleys?\u003c\/h3\u003e\u003cp\u003eOnly if you change the tooth count. Steps per mm = (motor steps × microsteps) ÷ (teeth × 2 mm). Swapping a 20T for another 20T needs no change.\u003c\/p\u003e\u003ch3\u003eWill these fit an 8 mm lead screw?\u003c\/h3\u003e\u003cp\u003eYes, choose the 8 mm bore version. It also fits 8 mm idler shafts and larger motor shafts.\u003c\/p\u003e\u003ch3\u003eAre they compatible with GT3 or 3 mm pitch belts?\u003c\/h3\u003e\u003cp\u003eNo. These are 2 mm pitch GT2 pulleys for 6 mm wide GT2 belts. GT3 and HTD 3M belts need different pulleys.\u003c\/p\u003e\u003ch3\u003eHow do I secure the pulley to the shaft?\u003c\/h3\u003e\u003cp\u003eSlide the pulley on, align one grub screw with the flat of the motor shaft if it has one, and tighten both M3 grub screws with a 1.5 mm hex key. A drop of threadlocker stops them loosening from vibration.\u003c\/p\u003e","brand":"Glunova Biotech","offers":[{"title":"16T, 5 mm bore, silver (5-pack)","offer_id":50753907327215,"sku":"GT2-16T-5-SLV-5","price":13.0,"currency_code":"SGD","in_stock":true},{"title":"16T, 5 mm bore, black (5-pack)","offer_id":50753907359983,"sku":"GT2-16T-5-BLK-5","price":14.0,"currency_code":"SGD","in_stock":true},{"title":"20T, 5 mm bore, silver (5-pack)","offer_id":50753907392751,"sku":"GT2-20T-5-SLV-5","price":13.0,"currency_code":"SGD","in_stock":true},{"title":"20T, 5 mm bore, black (5-pack)","offer_id":50753907425519,"sku":"GT2-20T-5-BLK-5","price":14.0,"currency_code":"SGD","in_stock":true},{"title":"20T, 8 mm bore, silver (5-pack)","offer_id":50753907458287,"sku":"GT2-20T-8-SLV-5","price":13.0,"currency_code":"SGD","in_stock":true},{"title":"20T, 8 mm bore, black (5-pack)","offer_id":50753907491055,"sku":"GT2-20T-8-BLK-5","price":14.0,"currency_code":"SGD","in_stock":true},{"title":"30T, 5 mm bore, silver (2-pack)","offer_id":50753907523823,"sku":"GT2-30T-5-SLV-2","price":12.0,"currency_code":"SGD","in_stock":true},{"title":"30T, 8 mm bore, silver (2-pack)","offer_id":50753907556591,"sku":"GT2-30T-8-SLV-2","price":12.0,"currency_code":"SGD","in_stock":true},{"title":"36T, 5 mm bore, silver (2-pack)","offer_id":50753907589359,"sku":"GT2-36T-5-SLV-2","price":13.0,"currency_code":"SGD","in_stock":true},{"title":"36T, 8 mm bore, silver (2-pack)","offer_id":50753907622127,"sku":"GT2-36T-8-SLV-2","price":13.0,"currency_code":"SGD","in_stock":true},{"title":"40T, 5 mm bore, silver (2-pack)","offer_id":50753907654895,"sku":"GT2-40T-5-SLV-2","price":14.0,"currency_code":"SGD","in_stock":true},{"title":"40T, 8 mm bore, silver (2-pack)","offer_id":50753907687663,"sku":"GT2-40T-8-SLV-2","price":14.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/5406\/2063\/files\/05_1c283f63-a9f8-4706-ae31-3203dbfc89c6.jpg?v=1789371706","url":"https:\/\/armdojo.com\/products\/gt2-timing-pulley-16-20-30-36-40-teeth","provider":"ArmDojo","version":"1.0","type":"link"}