{"product_id":"htd8m-bf-timing-belt-pulley-12-72-tooth-25mm-30mm","title":"BF-type HTD8M 25mm-30mm Timing Belt Pulley 12 - 72 Tooth for CNC Step Motor","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eHTD8M BF-Type Timing Belt Pulley — Precision Drive for CNC \u0026amp; Stepper Motor Systems\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or mismatched pulley throws off your CNC router, 3D printer, or automation axis, the entire project stalls. Makers, workshop engineers, and motion-control builders who need a reliable HTD8M timing belt pulley with a wide tooth-count selection can stop searching — this BF-type HTD8M timing belt pulley series covers 12 through 72 teeth in a single listing, letting you match the exact gear ratio your drive system demands.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined to the HTD8M tooth profile (8 mm pitch) and is available in two belt widths: 25 mm (~0.98 in) and 30 mm (~1.18 in). The BF-type hub features a through-bore with a set-screw flat, making shaft mounting straightforward without special tooling. Tooth counts range from 12 T to 72 T, covering pitch diameters from approximately 30.6 mm (1.20 in) up to 183.3 mm (7.22 in).\u003c\/p\u003e\n\u003cp\u003eTypical applications include CNC router X\/Y\/Z axis drives, stepper-motor and servo-motor belt reduction stages, laser engraver gantry systems, and DIY automation conveyor builds where an HTD8M belt pulley with consistent tooth engagement is critical for positional accuracy.\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 HTD 8M open-end or closed-loop timing belts with 25 mm or 30 mm width. Verify your belt pitch (8 mm) and width before ordering. Bore diameter varies by tooth count — see variant options or contact us to confirm fit.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These HTD8M Timing Belt Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eBF-Type Hub with Set-Screw Flat\u003c\/strong\u003e\u003cbr\u003eThe BF hub style includes a through-bore and a machined flat for a set-screw, providing a secure, no-slip shaft connection without requiring a keyway cutter or press fit.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eHTD 8M Tooth Profile — 8 mm Pitch\u003c\/strong\u003e\u003cbr\u003eThe rounded HTD tooth form distributes belt load across a larger contact area than trapezoidal profiles, reducing tooth shear stress and extending belt life in high-torque CNC and servo applications.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eWide Tooth-Count Range: 12 T to 72 T\u003c\/strong\u003e\u003cbr\u003eWith 44 tooth-count options in a single listing, you can dial in the exact speed ratio for your stepper motor drive, servo reduction stage, or gantry axis without custom machining.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eTwo Belt Widths: 25 mm and 30 mm\u003c\/strong\u003e\u003cbr\u003eChoose 25 mm for lighter-duty or space-constrained builds, or step up to 30 mm for higher torque capacity and improved lateral belt stability on longer spans.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eConsistent Tooth Engagement for Positional Accuracy\u003c\/strong\u003e\u003cbr\u003eMachined tooth geometry maintains consistent pitch-line contact with the belt, which is essential for repeatable positioning in CNC routers, laser engravers, and pick-and-place systems.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e \u003cstrong\u003eReady for DIY and Workshop Integration\u003c\/strong\u003e\u003cbr\u003eCompact dimensions and standard HTD8M geometry mean these pulleys drop into existing belt-drive designs with minimal modification, saving setup time on both new builds and retrofit projects.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — HTD8M Timing Belt Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Type\u003c\/th\u003e\n\u003ctd\u003eHTD 8M (8 mm pitch, rounded tooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Style\u003c\/th\u003e\n\u003ctd\u003eBF-type (through-bore with set-screw flat)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e12 T – 72 T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width Compatibility\u003c\/th\u003e\n\u003ctd\u003e25 mm or 30 mm (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter Range\u003c\/th\u003e\n\u003ctd\u003eApprox. 30.6 mm – 183.3 mm (varies by tooth count)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\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\u003eMaterial\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\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pcs\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 drive system?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe tooth count determines the pitch diameter and, combined with your motor pulley tooth count, sets the speed\/torque ratio of your belt drive. Divide the driven pulley teeth by the drive pulley teeth to get the reduction ratio. For CNC routers and laser engravers, common pairings are 20 T drive \/ 40 T driven (2:1 reduction) or matched tooth counts for 1:1 direct drive. Select the tooth count that achieves your target ratio without exceeding your available center distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between 25 mm and 30 mm belt width variants?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe belt width affects torque capacity and lateral stability. A 30 mm wide pulley and belt can transmit more torque than a 25 mm set at the same speed, making it better suited for heavier gantry axes or high-acceleration servo systems. The 25 mm variant is a good fit for lighter loads, compact builds, or where frame clearance is limited. Both variants use the same HTD 8M tooth pitch — only the width differs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this pulley fit my stepper motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe BF-type hub uses a through-bore secured by a set screw against a machined flat. Bore diameter varies by tooth count. Please check the bore specification for your selected variant or contact us to confirm compatibility with your motor shaft diameter (common sizes include 6.35 mm, 8 mm, 10 mm, 12 mm, and 14 mm). If your shaft diameter is not listed, reach out before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this pulley compatible with standard HTD 8M timing belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These pulleys are machined to the HTD 8M tooth profile standard (8 mm pitch, rounded tooth form). They are compatible with any HTD 8M open-end or closed-loop timing belt of matching width (25 mm or 30 mm). They are not compatible with GT2, T5, T10, or other pitch belts — always verify the belt pitch before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is the set-screw connection on the BF hub?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe BF-type hub set screw bears against a flat ground onto the shaft, which prevents rotation and axial movement under normal operating loads. For high-shock or reversing-load applications, consider using a thread-locking compound on the set screw and verifying the screw torque specification. For very high torque applications, a keyed bore variant may be more appropriate — contact us if you need guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this pulley on a CNC router or laser engraver gantry?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — HTD 8M pulleys are widely used in CNC router X\/Y\/Z axes and laser engraver gantry systems where the 8 mm pitch provides a good balance of tooth strength and positional resolution. Pair with an HTD 8M belt of matching width and ensure your idler or tensioner is also rated for 8M pitch. The 25 mm width is common for lighter laser gantries; the 30 mm width suits heavier CNC router axes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I determine the correct center distance between two pulleys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCenter distance depends on the pitch diameters of both pulleys and the belt length. Use the formula: C ≈ (L − π × (D1 + D2) \/ 2) \/ 2, where L is the belt length and D1\/D2 are the pitch diameters of the two pulleys. Many free online belt-drive calculators accept tooth count and pitch as inputs and will output the required center distance for a given belt length. Always allow for a small amount of tensioner adjustment range in your design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Number of Tooth and Belt Width above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"12 Tooth \/ 25mm \/ 1 pcs","offer_id":52446642864402,"sku":"WSS071717x1","price":5.66,"currency_code":"USD","in_stock":true},{"title":"13 Tooth \/ 25mm \/ 1 pcs","offer_id":52446642897170,"sku":"WSS071718x1","price":5.96,"currency_code":"USD","in_stock":true},{"title":"14 Tooth \/ 25mm \/ 1 pcs","offer_id":52446642929938,"sku":"WSS071719x1","price":7.09,"currency_code":"USD","in_stock":true},{"title":"15 Tooth \/ 25mm \/ 1 pcs","offer_id":52446642962706,"sku":"WSS071720x1","price":6.83,"currency_code":"USD","in_stock":true},{"title":"16 Tooth \/ 25mm \/ 1 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