{"product_id":"htd-3m-timing-belt-pulley-synchronous-wheel","title":"HTD-3M 12T-150T Timing Belt Pulley Pitch 3mm Tooth Width 11mm Synchronous Wheel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eHTD-3M Timing Belt Pulley — Precise 3mm Pitch Synchronous Wheel for Motion Control\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or mismatched pulley causes your CNC router to lose steps, your 3D printer to skip layers, or your conveyor to drift out of sync, the root cause is almost always an incompatible pitch or bore. These HTD-3M timing belt pulleys are engineered for engineers, makers, and machine builders who need a reliable, drop-in synchronous drive component without guesswork.\u003c\/p\u003e\n\u003cp\u003eEach pulley features an HTD (High Torque Drive) 3mm pitch tooth profile with an 11mm tooth width, available in tooth counts from 12T to 150T and bore diameters from 4mm to 25mm (approximately 0.16\" to 0.98\"). The body is typically machined from aluminum alloy with a natural or anodized finish, keeping rotating mass low while maintaining dimensional accuracy.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CNC router X\/Y axis drives, desktop 3D printer extruder and motion systems, robotic arm joint actuators, and light-duty conveyor or indexing table drives — all applications where consistent tooth engagement and repeatable positioning are non-negotiable.\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 standard HTD-3M open-end or closed-loop timing belts with 3mm pitch and 9–15mm belt width. Verify your belt width and bore requirement before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These HTD-3M Timing Belt Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e3mm HTD Pitch Profile\u003c\/strong\u003e\u003cbr\u003eTooth geometry matches standard HTD-3M belts for positive engagement and minimal backlash across the full tooth-count range.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWide Tooth Count Selection (12T–150T)\u003c\/strong\u003e\u003cbr\u003eFrom compact 12-tooth drive pulleys to large 150-tooth driven wheels, covering a broad range of speed-reduction and torque-multiplication ratios.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMultiple Bore Diameters (4–25mm)\u003c\/strong\u003e\u003cbr\u003eBore options from 4mm to 25mm accommodate common motor shaft sizes including NEMA 17 (5mm), NEMA 23 (6.35mm), and servo shafts up to 20–25mm.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚖️\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum body reduces rotational inertia for faster acceleration and deceleration in dynamic positioning systems.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📏\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e11mm Tooth Width\u003c\/strong\u003e\u003cbr\u003eConsistent 11mm tooth width across all tooth counts ensures uniform belt contact and load distribution.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSet-Screw Bore Retention\u003c\/strong\u003e\u003cbr\u003eTypically includes one or two set-screw holes for secure shaft fixation without requiring keyways on smaller bore variants.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — HTD-3M Timing Belt Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Pitch\u003c\/th\u003e\n\u003ctd\u003e3mm (HTD-3M)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Width\u003c\/th\u003e\n\u003ctd\u003e11mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e12T – 150T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e4mm – 25mm (approx. 0.16\" – 0.98\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminum alloy\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\u003ctr\u003e\n\u003cth\u003eFlange\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSet Screw\u003c\/th\u003e\n\u003ctd\u003eTypically included (M3 or M4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Belt\u003c\/th\u003e\n\u003ctd\u003eHTD-3M timing belt, 9–15mm width\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\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 tooth count for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth count determines your drive ratio. Divide the driven pulley tooth count by the drive pulley tooth count to get the reduction ratio. For example, a 15T drive and 60T driven pulley gives a 4:1 reduction. For CNC and 3D printer motion axes, 20T is a common starting point for NEMA 17 motors with standard GT2\/HTD-3M belts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore diameter should I select for a NEMA 17 stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNEMA 17 stepper motors typically have a 5mm output shaft. Select the 5mm bore variant. If your motor has a D-cut shaft, ensure the set screw aligns with the flat. NEMA 23 motors commonly use a 6.35mm (1\/4\") shaft — select the 6.35mm bore option.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys compatible with GT2 belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. These pulleys use the HTD-3M tooth profile, which has a rounded tooth shape designed for higher torque loads. GT2 belts use a different tooth geometry and are not interchangeable with HTD-3M pulleys. Always match your belt profile (HTD-3M) and pitch (3mm) to the pulley specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between standard and \"-B\" type variants (e.g., 3M20T vs 3M20T-B)?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe \"-B\" suffix typically indicates a flanged variant, where one or both sides of the pulley have a raised flange to prevent the belt from walking off the pulley during operation. Flanged versions are recommended for applications with lateral belt forces or where belt tracking is critical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these pulleys — can they handle high-torque applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum HTD-3M pulleys are suitable for light-to-medium duty applications such as 3D printers, CNC routers, and small robotics. For heavy industrial loads or continuous high-torque environments, verify the torque rating against your system requirements. Larger tooth counts distribute load over more teeth, improving torque capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these pulleys require any machining before installation?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMost variants are ready to install as-received. The bore is pre-machined to the selected diameter and the set-screw hole is pre-tapped. No additional machining is required for standard round shafts. If your shaft has a keyway, confirm whether a keyway-compatible variant is needed for your specific tooth count and bore combination.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys for a 3D printer build or upgrade?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. HTD-3M pulleys are widely used in CoreXY, Cartesian, and delta 3D printer motion systems. Common configurations use 20T drive pulleys on stepper motors paired with idler pulleys. Select the bore that matches your motor shaft and confirm the tooth width (11mm) is compatible with your belt width.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Type (tooth count) and Bore Diameter above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"3M15T \/ 4mm \/ 1Pcs","offer_id":52444243689746,"sku":"FXLxin730-0","price":3.52,"currency_code":"USD","in_stock":true},{"title":"3M15T \/ 5mm \/ 1Pcs","offer_id":52444243722514,"sku":"FXLxin730-1","price":3.47,"currency_code":"USD","in_stock":true},{"title":"3M15T-B \/ 6mm \/ 1Pcs","offer_id":52444243755282,"sku":"FXLxin730-2","price":3.6,"currency_code":"USD","in_stock":true},{"title":"3M15T-B \/ 6.35mm \/ 1Pcs","offer_id":52444243788050,"sku":"FXLxin730-3","price":3.6,"currency_code":"USD","in_stock":true},{"title":"3M15T-B \/ 8mm \/ 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