{"product_id":"8m-timing-belt-pulley-synchronous-wheel-30mm-belt","title":"8M 28T-60T Timing Belt Pulley Synchronous Wheel Select Bore For 30mm Width Belt","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e8M Timing Belt Pulley Synchronous Wheel — Precision Drive for 30mm Belt Width\u003c\/h2\u003e\n\u003cp\u003eWhen your automation project demands reliable, slip-free power transmission, a mismatched or undersized pulley becomes the weakest link in the entire drivetrain. Whether you are a CNC builder, robotics engineer, or workshop maker, these 8M pitch timing belt pulleys give you the dimensional accuracy and bore flexibility needed to get your build running right the first time.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminum alloy and features a standard 8M tooth profile (8mm pitch) designed for 30mm wide synchronous belts. The tooth count ranges from 28T to 60T, with outer diameters scaling accordingly — from approximately 71mm (2.80 in) for the 28-tooth version up to approximately 152mm (5.98 in) for the 60-tooth version. Bore options span 8mm through 30mm, with plain bore and keyway variants available to suit both set-screw and keyed shaft configurations.\u003c\/p\u003e\n\u003cp\u003eThese pulleys are well suited for CNC router X\/Y axis drives, 3D printer extruder and gantry systems, conveyor indexing mechanisms, and light industrial automation where consistent tooth engagement and low backlash are critical. The 8M profile is a popular choice for medium-to-high torque synchronous drive applications requiring long belt spans.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for 8M pitch (8mm tooth pitch) synchronous timing belts with 30mm belt width. Verify your belt pitch, width, and shaft diameter before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 8M Timing Belt Pulleys\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eWide Tooth Count Range\u003c\/strong\u003e\n\u003cp\u003eAvailable from 28T to 60T, allowing you to dial in your drive ratio precisely for CNC, robotics, or conveyor applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n\u003cstrong\u003eMultiple Bore Options\u003c\/strong\u003e\n\u003cp\u003ePlain bore sizes from 8mm to 30mm, plus keyway variants (3mm, 4mm, 5mm, 6mm, 8mm, 10mm keyways) for secure shaft coupling without slippage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\n\u003cstrong\u003eAluminum Alloy Construction\u003c\/strong\u003e\n\u003cp\u003eLightweight yet rigid aluminum body keeps rotational inertia low while maintaining dimensional stability under continuous cyclic loading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n\u003cstrong\u003eStandard 8M Tooth Profile\u003c\/strong\u003e\n\u003cp\u003eConforms to the 8M synchronous belt standard (8mm pitch), ensuring full compatibility with off-the-shelf 8M timing belts from major suppliers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n\u003cstrong\u003e30mm Belt Width Optimized\u003c\/strong\u003e\n\u003cp\u003eTooth width and flange geometry are matched to 30mm wide belts, providing even load distribution and preventing belt tracking issues.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\n\u003cstrong\u003eReady for Direct Shaft Mounting\u003c\/strong\u003e\n\u003cp\u003eEach bore is finished to close tolerance for a clean shaft fit. Keyway variants include a machined keyway slot for use with standard parallel keys.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 8M Timing Belt Pulley\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Pitch\u003c\/th\u003e\n\u003ctd\u003e8M (8mm tooth pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Width Compatibility\u003c\/th\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e28T, 30T, 40T, 44T, 50T, 60T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter Range\u003c\/th\u003e\n\u003ctd\u003eApprox. 71mm – 152mm (2.80 in – 5.98 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Range\u003c\/th\u003e\n\u003ctd\u003e8mm – 30mm (plain bore); keyway variants available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Options\u003c\/th\u003e\n\u003ctd\u003e3mm, 4mm, 5mm, 6mm, 8mm, 10mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Width (Tooth Width)\u003c\/th\u003e\n\u003ctd\u003e32mm (fits 30mm wide belt with flange clearance)\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\u003eNatural \/ anodized (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003e8M synchronous (trapezoidal)\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\u003eWeight\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\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 (28T vs 30T vs 40T, etc.)?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe tooth count determines your pulley's pitch diameter and, when paired with a driven pulley, sets your drive ratio. A smaller tooth count (e.g., 28T) gives a smaller diameter and higher speed on the driven shaft when paired with a larger pulley. A larger tooth count (e.g., 60T) gives a larger diameter and more torque multiplication. Calculate your required ratio first, then select the tooth count combination that achieves it within your center-distance constraints.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size should I order for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eOrder the bore size that matches your shaft diameter exactly. For example, if your motor shaft is 20mm, select the 20mm bore variant. If your shaft uses a key for torque transfer, select the corresponding keyway variant (e.g., \"20mm Bore 6mm Keyway\"). Do not order a bore larger than your shaft diameter — the pulley cannot be re-bored after purchase without machining equipment.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between a plain bore and a keyway bore?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA plain bore pulley relies on set screws (grub screws) tightened against the shaft to prevent rotation. A keyway bore has a machined slot that accepts a standard parallel key, which provides a positive mechanical lock between the shaft and pulley. Keyway variants are recommended for higher torque applications or where the shaft direction reverses frequently, as set screws alone can loosen under shock loads.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys compatible with any 8M timing belt?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — these pulleys conform to the standard 8M tooth profile (8mm pitch, trapezoidal tooth form) and are compatible with any standard 8M synchronous timing belt from major belt manufacturers. However, they are specifically dimensioned for 30mm wide belts. Using a narrower belt (e.g., 20mm) is possible but will reduce load capacity; using a wider belt is not recommended as the belt may contact the flanges.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are aluminum timing belt pulleys for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAluminum alloy pulleys offer an excellent strength-to-weight ratio and are suitable for the majority of CNC, 3D printing, robotics, and light industrial automation applications. For very high torque or heavy shock-load environments (e.g., large industrial conveyors), consider whether a steel pulley would be more appropriate. For typical maker and automation builds, aluminum 8M pulleys handle the loads well within the belt's rated tension limits.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to purchase a timing belt separately?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. This listing is for the pulley only. You will need to purchase an 8M pitch, 30mm wide timing belt separately. When sizing your belt, calculate the required belt length based on your center distance and the pitch diameters of both pulleys in your drive system. Standard 8M belt lengths are available in a wide range of closed-loop lengths.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys for a CNC router or laser cutter build?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The 8M pulley series is a common choice for CNC router axis drives, laser cutter gantry systems, and similar motion control applications where the 8mm pitch provides a good balance of positional resolution and torque capacity. Pair with an appropriately tensioned 8M belt and ensure your motor shaft bore matches the selected variant for a secure, backlash-free connection.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Size (tooth count) and Bore above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right tooth count (28T vs 30T vs 40T, etc.)?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The tooth count determines your pulley's pitch diameter and drive ratio. A smaller tooth count gives a smaller diameter and higher speed on the driven shaft. A larger tooth count gives more torque multiplication. Calculate your required ratio first, then select the tooth count combination that achieves it within your center-distance constraints.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore size should I order for my shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Order the bore size that matches your shaft diameter exactly. If your shaft uses a key for torque transfer, select the corresponding keyway variant. Do not order a bore larger than your shaft diameter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between a plain bore and a keyway bore?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A plain bore pulley relies on set screws to prevent rotation. A keyway bore has a machined slot for a parallel key, providing a positive mechanical lock. Keyway variants are recommended for higher torque or reversing applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these pulleys compatible with any 8M timing belt?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, these pulleys conform to the standard 8M tooth profile and are compatible with any standard 8M synchronous timing belt. They are specifically dimensioned for 30mm wide belts.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong are aluminum timing belt pulleys?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Aluminum alloy pulleys offer an excellent strength-to-weight ratio and are suitable for CNC, 3D printing, robotics, and light industrial automation. For very high torque or heavy shock-load environments, consider steel pulleys.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need to purchase a timing belt separately?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. This listing is for the pulley only. You will need to purchase an 8M pitch, 30mm wide timing belt separately.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these pulleys for a CNC router or laser cutter build?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The 8M pulley series is a common choice for CNC router axis drives and laser cutter gantry systems. Pair with an appropriately tensioned 8M belt and ensure your motor shaft bore matches the selected variant.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"8M-28Teeth \/ 8mm","offer_id":52446772822290,"sku":"GLFBLFF8M28TC32D8BFx1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"8M-28Teeth \/ 10mm","offer_id":52446772855058,"sku":"GLFBLFF8M28TC32D10BFx1","price":36.42,"currency_code":"USD","in_stock":true},{"title":"8M-28Teeth \/ 12mm","offer_id":52446772887826,"sku":"GLFBLFF8M28TC32D12BFx1","price":36.27,"currency_code":"USD","in_stock":true},{"title":"8M-28Teeth \/ 14mm","offer_id":52446772920594,"sku":"GLFBLFF8M28TC32D14BFx1","price":36.11,"currency_code":"USD","in_stock":true},{"title":"8M-28Teeth \/ 15mm","offer_id":52446772953362,"sku":"GLFBLFF8M28TC32D15BFx1","price":35.97,"currency_code":"USD","in_stock":true},{"title":"8M-28Teeth \/ 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