{"product_id":"v-belt-pulley-motor-pulleys-hollow-6-8mm-discs-dia-o120-250mm-for-2a-type-belts","title":"V-Belt Pulley Motor Pulleys Hollow 6-8mm Discs Dia Ø120-250mm For 2A Type Belts","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003ch2\u003eV-Belt Pulley with Hollow Bore — Reliable 2A-Type Belt Drive for Motors \u0026amp; Machinery\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003cp\u003eWhen your motor drive keeps slipping, misaligning, or wearing out belts prematurely, the root cause is often an undersized or poorly matched pulley. Engineers, machine builders, and serious DIYers who need a dependable 2A-type V-belt drive solution will find these hollow-bore disc pulleys a straightforward, drop-in upgrade for both new builds and retrofit applications.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from cast iron or steel alloy (typically grey cast iron HT200 or equivalent), featuring a hollow bore of 6 mm or 8 mm to suit common motor shaft diameters. Disc outer diameters span Ø120 mm to Ø250 mm (approximately 4.7\" to 9.8\"), with face widths ranging from 18 mm to 30 mm (0.71\" to 1.18\") depending on the selected variant. The single-groove profile is precision-cut to the 2A (A-section) V-belt standard.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include small electric motor drives on bench-top lathes and drill presses, conveyor belt tensioning systems in light industrial automation, and custom CNC or robotics power-transmission builds where a compact, low-cost pulley is needed to step up or step down shaft speed.\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 2A \/ A-section V-belts. Bore sizes: 6 mm or 8 mm. Verify your motor shaft diameter and belt section before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These V-Belt 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 Size Range\u003c\/strong\u003e\n\u003cp\u003eOuter diameters from Ø120 mm to Ø250 mm (4.7\"–9.8\") with face widths of 18–30 mm, covering a broad range of speed-ratio and torque requirements in a single product family.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🕳️\u003c\/div\u003e\n\u003cstrong\u003eHollow Bore Design\u003c\/strong\u003e\n\u003cp\u003e6 mm and 8 mm through-bore options fit the most common small motor shaft sizes directly, eliminating the need for custom boring or adapters in most standard applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cstrong\u003e2A-Section Groove Profile\u003c\/strong\u003e\n\u003cp\u003eSingle groove precision-machined to the 2A (A-section) V-belt standard, ensuring correct belt seating, even load distribution, and reduced belt wear over extended operation cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🏗️\u003c\/div\u003e\n\u003cstrong\u003eRigid Cast Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from cast iron or steel alloy for dimensional stability under dynamic loads, resisting deformation and maintaining concentricity even at elevated RPM typical of small motor drives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cstrong\u003eBalanced Disc Profile\u003c\/strong\u003e\n\u003cp\u003eThe disc-style body keeps rotating mass low and evenly distributed, reducing vibration and bearing load on both the motor and the driven shaft — important for smooth, quiet operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🛠️\u003c\/div\u003e\n\u003cstrong\u003eDrop-In Retrofit Compatibility\u003c\/strong\u003e\n\u003cp\u003eStandard bore and groove dimensions mean these pulleys can replace worn or undersized pulleys on lathes, drill presses, conveyors, and DIY CNC builds without custom machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — V-Belt Pulley\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Type\u003c\/th\u003e\n\u003ctd\u003e2A \/ A-Section V-Belt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGroove Quantity\u003c\/th\u003e\n\u003ctd\u003eSingle groove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003eØ120 mm – Ø250 mm (4.72\" – 9.84\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFace Width\u003c\/th\u003e\n\u003ctd\u003e18 mm – 30 mm (0.71\" – 1.18\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e6 mm or 8 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCast iron \/ steel alloy (typically HT200 or equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway\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\u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 piece per order (default)\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 outer diameter for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe speed ratio between your motor and driven shaft determines the pulley diameter ratio. Divide the motor pulley OD by the driven pulley OD to get the speed reduction (or multiply for speed increase). For example, a 120 mm drive pulley paired with a 240 mm driven pulley gives a 2:1 speed reduction. Select the OD that achieves your target RPM at the driven shaft.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I choose — 6 mm or 8 mm?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your motor shaft diameter with a caliper before ordering. The bore must match the shaft diameter exactly for a secure fit. A 6 mm bore suits smaller fractional-horsepower motors, while 8 mm is common on slightly larger motors. If your shaft is larger, contact us to confirm availability of other bore sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys compatible with standard A-section V-belts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The groove is machined to the 2A (A-section) V-belt profile, which is the most widely available V-belt standard. Standard A-section belts (e.g., A30, A40, A50, etc.) will seat correctly in the groove. Do not use B-section or other profile belts, as they will not seat properly and will wear prematurely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these pulleys under continuous load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCast iron (HT200 or equivalent) has a tensile strength of approximately 200 MPa and excellent vibration-damping properties, making it well-suited for continuous-duty belt drive applications at moderate speeds. For high-speed or high-torque applications, verify that the pulley OD and bore are appropriately sized for your power requirements and consult a mechanical engineer if needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these pulleys resist corrosion?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCast iron has moderate corrosion resistance in dry indoor environments. For humid or outdoor environments, applying a light coat of machine oil or rust-inhibiting paint to non-groove surfaces is recommended. The V-belt groove itself should remain clean and dry for proper belt traction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys on a lathe, drill press, or conveyor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — these are among the most common retrofit applications. They are suitable for bench-top lathes, drill presses, band saws, and light conveyor drives where A-section V-belts are already in use. Confirm that the bore matches your existing shaft and that the OD gives you the correct speed ratio before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs a keyway included, and how is the pulley secured to the shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eKeyway availability depends on the specific variant. Please check the variant details or contact us to confirm. In the absence of a keyway, a set screw (grub screw) through the hub is the typical securing method for hollow-bore pulleys of this type. Ensure the set screw bears on a flat or dimple on the shaft for a secure connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your size (OD × face width × bore) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"120mm x 18mm x 6mm \/ 1","offer_id":52445633249554,"sku":"XYHGY-PUL2602-18-001x1","price":261.65,"currency_code":"USD","in_stock":true},{"title":"120mm x 19mm x 6mm \/ 1","offer_id":52445633282322,"sku":"XYHGY-PUL2602-18-002x1","price":260.97,"currency_code":"USD","in_stock":true},{"title":"120mm x 20mm x 6mm \/ 1","offer_id":52445633315090,"sku":"XYHGY-PUL2602-18-003x1","price":260.29,"currency_code":"USD","in_stock":true},{"title":"120mm x 22mm x 6mm \/ 1","offer_id":52445633347858,"sku":"XYHGY-PUL2602-18-004x1","price":258.79,"currency_code":"USD","in_stock":true},{"title":"120mm x 24mm x 8mm \/ 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