{"product_id":"5m-timing-pulley-30-75t-20mm-belt-synchronous-wheel-gear","title":"5M 30-75T Timing Pulley 20mm Belt Synchronous Wheel Gear 3D Printer Bore 5-22mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e5M Timing Pulley — Precision Synchronous Drive for CNC, 3D Printers \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eWhen your motion-control build demands zero-slip power transfer, a mismatched or worn pulley becomes the weakest link in the entire drivetrain. Engineers, makers, and machine builders who rely on repeatable positioning need a 5M timing pulley that holds tolerance run after run — whether they are tuning a CoreXY 3D printer, commissioning a CNC router axis, or assembling a conveyor module.\u003c\/p\u003e\n\u003cp\u003eThis 5M timing pulley is machined to accept a 20mm-wide 5M synchronous belt (5 mm pitch). The toothed hub is available in 30 to 75 teeth configurations, with a tooth width of 21 mm (approximately 0.83 in) and bore options ranging from 5 mm to 28 mm (approximately 0.20 in to 1.10 in). Each pulley ships as a single unit with a set-screw bore for shaft retention.\u003c\/p\u003e\n\u003cp\u003eTypical applications include 5M timing pulley for CNC router X\/Y axis drives, 3D printer extruder and motion systems requiring a 20mm 5M synchronous wheel, and light industrial conveyor or indexing table builds where a synchronous gear pulley ensures accurate step-to-distance ratios.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for \u003cstrong\u003e5M pitch (5 mm) synchronous belts, 20 mm wide\u003c\/strong\u003e. Verify your shaft diameter matches the selected bore before ordering. Set-screw retention included.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 5M Timing Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cstrong\u003eWide Tooth Count Range\u003c\/strong\u003e\n\u003cp\u003eAvailable from 30 T to 75 T, letting you dial in the exact gear ratio your drive system requires without custom machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cstrong\u003eMulti-Bore Options\u003c\/strong\u003e\n\u003cp\u003eBore sizes from 5 mm to 28 mm (including 6.35 mm \/ ¼ in) cover stepper motor shafts, servo shafts, and standard metric rod stock used in CNC and robotics builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📏\u003c\/div\u003e\n\u003cstrong\u003e21 mm Tooth Width\u003c\/strong\u003e\n\u003cp\u003eMatched to 20 mm wide 5M belts with a 0.5 mm flange overhang on each side to keep the belt tracking straight under load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚡\u003c\/div\u003e\n\u003cstrong\u003e5M Pitch Synchronous Profile\u003c\/strong\u003e\n\u003cp\u003eThe 5 mm pitch tooth profile delivers positive engagement with no belt slip, maintaining accurate step-to-distance ratios in open-loop stepper and closed-loop servo systems alike.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🛡️\u003c\/div\u003e\n\u003cstrong\u003eSet-Screw Bore Retention\u003c\/strong\u003e\n\u003cp\u003eEach pulley includes a radial set screw for secure shaft clamping, simplifying installation on smooth or flat-keyed shafts without additional hardware.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cstrong\u003eBroad Application Fit\u003c\/strong\u003e\n\u003cp\u003eSuitable for 3D printer motion systems, CNC router axis drives, laser cutter gantries, conveyor indexing tables, and general automation where a reliable synchronous wheel gear is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — 5M Timing Pulley\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Pitch\u003c\/th\u003e\n\u003ctd\u003e5M (5 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width Compatibility\u003c\/th\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Width\u003c\/th\u003e\n\u003ctd\u003e21 mm (approx. 0.83 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e30 \/ 32 \/ 34 \/ 36 \/ 38 \/ 40 \/ 42 \/ 44 \/ 45 \/ 46 \/ 48 \/ 50 \/ 60 \/ 72 \/ 75 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e5 \/ 6 \/ 6.35 \/ 8 \/ 10 \/ 12 \/ 12.7 \/ 14 \/ 15 \/ 16 \/ 17 \/ 18 \/ 19 \/ 20 \/ 22 \/ 24 \/ 25 \/ 28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Retention\u003c\/th\u003e\n\u003ctd\u003eSet screw (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Material\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right number of teeth for my drive?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth count determines your drive ratio. Divide the driven pulley teeth by the driving pulley teeth to get the ratio. For example, a 30 T drive pulley paired with a 60 T driven pulley gives a 2:1 reduction. Choose a tooth count that achieves your target speed or torque ratio while keeping belt span within your frame constraints.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I select for a NEMA 17 stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStandard NEMA 17 stepper motors have a 5 mm output shaft. Select the 5 mm bore option. If your motor has a flat-keyed or D-cut shaft, the set screw will engage the flat for a more secure grip. For NEMA 23 motors with an 8 mm shaft, choose the 8 mm bore.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this pulley compatible with HTD 5M belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. This pulley uses the HTD 5M tooth profile (5 mm pitch, rounded tooth form), which is the standard for most 5M synchronous belts. Confirm your belt is labeled 5M or HTD-5M and is 20 mm wide to ensure proper meshing and tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the set-screw connection — will it slip under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe set screw provides adequate retention for typical CNC, 3D printer, and light automation torque loads. For higher-torque applications, ensure the screw is tightened against a flat on the shaft (D-cut or keyway) rather than a smooth round surface. Apply thread-locking compound if vibration is a concern.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this pulley on a stainless steel or hardened shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe set screw can clamp onto stainless steel shafts. For hardened shafts, ensure the set screw tip is harder than the shaft surface, or use a shaft with a machined flat to prevent the screw from slipping. Contact us to confirm material compatibility for your specific application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the outer diameter for a given tooth count?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe pitch diameter of a 5M pulley is calculated as: PD = (Teeth × Pitch) ÷ π. For example, a 30 T pulley has a pitch diameter of approximately 47.7 mm, and a 60 T pulley approximately 95.5 mm. The outer diameter is slightly smaller than the pitch diameter due to the tooth profile. Refer to the variant listing or contact us for exact OD values per tooth count.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this suitable for a laser cutter gantry or conveyor indexing table?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 5M pitch profile is widely used in laser cutter X\/Y gantries and conveyor indexing systems where accurate positioning and moderate belt tension are required. Select a tooth count that matches your existing drive ratio, and verify the bore fits your motor or drive shaft diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003etooth count and bore diameter\u003c\/strong\u003e above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"30Teeth \/ 5mm \/ 21mm \u0026 1","offer_id":52444924018962,"sku":"GLFBLFF5M30TC21D5BFx1","price":24.09,"currency_code":"USD","in_stock":true},{"title":"30Teeth \/ 6mm \/ 21mm \u0026 1","offer_id":52444924051730,"sku":"GLFBLFF5M30TC21D6BFx1","price":24.02,"currency_code":"USD","in_stock":true},{"title":"30Teeth \/ 6.35mm \/ 21mm \u0026 1","offer_id":52444924084498,"sku":"GLFBLFF5M30TC21D6.35BFx1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"30Teeth \/ 8mm \/ 21mm \u0026 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