{"product_id":"aluminium-single-slot-belt-pulleys-od-40-100mm-a-type-triangle-belt","title":"Aluminium Single-slot Belt Pulleys OD 40\/50\/60\/80\/100mm for A-type Triangle Belt","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eAluminium Single-slot Belt Pulleys — Reliable A-type Drive for Motors \u0026amp; Machinery\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or mismatched pulley stalls your conveyor, motor test rig, or DIY power-transmission project, you need a dimensionally accurate drop-in replacement you can trust. These aluminium single-slot belt pulleys are engineered for hobbyists, makers, and small-machine builders who demand consistent torque transfer without the weight penalty of cast iron.\u003c\/p\u003e\n\u003cp\u003eEach pulley is machined from aluminium alloy, delivering a lightweight yet rigid body with a natural resistance to oxidation. Outer diameters span 40 mm (≈1.57 in) to 100 mm (≈3.94 in), and bore diameters range from 8 mm (≈0.31 in) to 30 mm (≈1.18 in), covering the most common shaft sizes used in compact drive systems. The single groove is profiled to the A-type (13 mm top-width) V-belt standard.\u003c\/p\u003e\n\u003cp\u003eTypical applications include small electric motor drives for bench-top lathes and drill presses, conveyor belt tensioning systems in light automation rigs, and custom speed-reduction assemblies in robotics or CNC router builds — all scenarios where an aluminium single-slot A-type belt pulley keeps the build compact and the drive efficient.\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 \u003cstrong\u003eA-type (A-section) V-belts\u003c\/strong\u003e with 13 mm top width. Verify your shaft diameter against the bore options (8 \/ 10 \/ 12 \/ 13 \/ 14 \/ 15 \/ 16 \/ 18 \/ 20 \/ 22 \/ 24 \/ 25 \/ 30 mm) before ordering. Set-screw or keyway machining may be required for your shaft — see variant options.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Aluminium Single-slot A-type Belt Pulleys\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eAluminium Alloy Construction\u003c\/strong\u003e — Significantly lighter than cast-iron equivalents, reducing bearing load and enabling higher-speed operation in compact drive trains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eWide Size Matrix\u003c\/strong\u003e — Five outer diameters (40 \/ 50 \/ 60 \/ 80 \/ 100 mm) paired with up to thirteen bore sizes per OD, giving you precise shaft-fit options without custom machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eA-type V-belt Groove Profile\u003c\/strong\u003e — Single groove machined to A-section geometry for secure belt seating, minimal slip, and efficient power transfer across the full speed range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-resistant Surface\u003c\/strong\u003e — Aluminium's natural oxide layer resists rust in workshop and light-industrial environments, extending service life without additional coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eBalanced for Smooth Running\u003c\/strong\u003e — Machined concentrically to minimise vibration at operating RPM, protecting motor bearings and prolonging belt life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eVersatile Bore Range\u003c\/strong\u003e — Bore diameters from 8 mm to 30 mm accommodate standard motor shafts, gearbox output shafts, and custom drive axles across a broad range of DIY and light-industrial builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Aluminium Single-slot Belt Pulleys\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminium alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBelt Type\u003c\/th\u003e\n\u003ctd\u003eA-type (A-section) V-belt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Grooves\u003c\/th\u003e\n\u003ctd\u003e1 (single-slot)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e40 mm \/ 50 mm \/ 60 mm \/ 80 mm \/ 100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e8 \/ 10 \/ 12 \/ 13 \/ 14 \/ 15 \/ 16 \/ 18 \/ 20 \/ 22 \/ 24 \/ 25 \/ 30 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGroove Profile\u003c\/th\u003e\n\u003ctd\u003eA-section (13 mm top width, 40° included angle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eNatural aluminium (machined)\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\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 outer diameter for my drive system?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe OD determines your speed ratio. Divide the motor pulley OD by the driven pulley OD to get the reduction ratio. For example, a 40 mm drive pulley paired with an 80 mm driven pulley gives a 2:1 reduction. Select the OD combination that achieves your target output RPM based on your motor speed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I order for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your shaft diameter with a vernier caliper. Choose the bore that matches exactly — a bore that is too large will cause runout and vibration. If your shaft uses a keyway, you will need to have the bore keyway-machined after purchase, as these pulleys are supplied with a plain bore.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these pulleys strong enough for continuous-duty applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminium alloy pulleys are well-suited for light-to-medium duty continuous operation — typical for bench-top machinery, small conveyors, and DIY CNC builds. For heavy shock loads or very high torque (e.g., large industrial compressors), cast-iron or steel pulleys are generally recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these pulleys corrode in a damp workshop environment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminium forms a stable oxide layer that resists rust in typical workshop conditions. For environments with exposure to saltwater, acids, or strong alkalis, consider applying a light coat of protective spray or anodising the pulley surface for extended service life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat A-type V-belt should I pair with these pulleys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAny standard A-section V-belt (13 mm top width, 8 mm height, 40° angle) will seat correctly in the groove. Measure the centre distance between your two pulleys and calculate the required belt length using the standard formula: L ≈ 2C + 1.57(D + d) + (D − d)² \/ 4C, where C is centre distance and D\/d are the two pulley ODs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these pulleys on both the drive (motor) side and the driven side?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These pulleys are interchangeable between drive and driven positions. Simply select the appropriate OD for each position to achieve your desired speed ratio. Ensure both pulleys are aligned on the same plane to prevent belt tracking issues and premature wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I secure the pulley to the shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese pulleys are supplied with a plain bore. Securing methods include: (1) drilling and tapping a set-screw hole through the hub, (2) having a keyway machined to match your shaft, or (3) using a locking collar alongside the pulley. Choose the method appropriate for your torque level and shaft configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003eSize (Outer Diameter × Bore)\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":"40mm x 8mm \/ 1 Pcs","offer_id":52445262119186,"sku":"LRPPIDAILUN905x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 10mm \/ 1 Pcs","offer_id":52445262151954,"sku":"LRPPIDAILUN906x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 12mm \/ 1 Pcs","offer_id":52445262184722,"sku":"LRPPIDAILUN907x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 13mm \/ 1 Pcs","offer_id":52445262217490,"sku":"LRPPIDAILUN908x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 14mm \/ 1 Pcs","offer_id":52445262250258,"sku":"LRPPIDAILUN909x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 15mm \/ 1 Pcs","offer_id":52445262283026,"sku":"LRPPIDAILUN910x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 16mm \/ 1 Pcs","offer_id":52445262315794,"sku":"LRPPIDAILUN911x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 18mm \/ 1 Pcs","offer_id":52445262348562,"sku":"LRPPIDAILUN912x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"40mm x 20mm \/ 1 Pcs","offer_id":52445262381330,"sku":"LRPPIDAILUN913x1","price":23.38,"currency_code":"USD","in_stock":true},{"title":"50mm x 8mm \/ 1 Pcs","offer_id":52445262414098,"sku":"LRPPIDAILUN914x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 10mm \/ 1 Pcs","offer_id":52445262446866,"sku":"LRPPIDAILUN915x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 12mm \/ 1 Pcs","offer_id":52445262479634,"sku":"LRPPIDAILUN916x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 13mm \/ 1 Pcs","offer_id":52445262512402,"sku":"LRPPIDAILUN917x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 14mm \/ 1 Pcs","offer_id":52445262545170,"sku":"LRPPIDAILUN918x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 15mm \/ 1 Pcs","offer_id":52445262577938,"sku":"LRPPIDAILUN919x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 16mm \/ 1 Pcs","offer_id":52445262610706,"sku":"LRPPIDAILUN920x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 18mm \/ 1 Pcs","offer_id":52445262643474,"sku":"LRPPIDAILUN921x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"50mm x 20mm \/ 1 Pcs","offer_id":52445262676242,"sku":"LRPPIDAILUN922x1","price":33.58,"currency_code":"USD","in_stock":true},{"title":"60mm x 8mm \/ 1 Pcs","offer_id":52445262709010,"sku":"LRPPIDAILUN923x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 10mm \/ 1 Pcs","offer_id":52445262741778,"sku":"LRPPIDAILUN924x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 12mm \/ 1 Pcs","offer_id":52445262774546,"sku":"LRPPIDAILUN925x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 13mm \/ 1 Pcs","offer_id":52445262807314,"sku":"LRPPIDAILUN926x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 14mm \/ 1 Pcs","offer_id":52445262840082,"sku":"LRPPIDAILUN927x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 15mm \/ 1 Pcs","offer_id":52445262872850,"sku":"LRPPIDAILUN928x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 16mm \/ 1 Pcs","offer_id":52445262905618,"sku":"LRPPIDAILUN929x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 18mm \/ 1 Pcs","offer_id":52445262938386,"sku":"LRPPIDAILUN930x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 20mm \/ 1 Pcs","offer_id":52445262971154,"sku":"LRPPIDAILUN931x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 22mm \/ 1 Pcs","offer_id":52445263003922,"sku":"LRPPIDAILUN932x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 24mm \/ 1 Pcs","offer_id":52445263036690,"sku":"LRPPIDAILUN933x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 25mm \/ 1 Pcs","offer_id":52445263069458,"sku":"LRPPIDAILUN934x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"60mm x 30mm \/ 1 Pcs","offer_id":52445263102226,"sku":"LRPPIDAILUN935x1","price":39.44,"currency_code":"USD","in_stock":true},{"title":"80mm x 8mm \/ 1 Pcs","offer_id":52445263134994,"sku":"LRPPIDAILUN936x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 10mm \/ 1 Pcs","offer_id":52445263167762,"sku":"LRPPIDAILUN937x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 12mm \/ 1 Pcs","offer_id":52445263200530,"sku":"LRPPIDAILUN938x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 13mm \/ 1 Pcs","offer_id":52445263233298,"sku":"LRPPIDAILUN939x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 14mm \/ 1 Pcs","offer_id":52445263266066,"sku":"LRPPIDAILUN940x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 15mm \/ 1 Pcs","offer_id":52445263298834,"sku":"LRPPIDAILUN941x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 16mm \/ 1 Pcs","offer_id":52445263331602,"sku":"LRPPIDAILUN942x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 18mm \/ 1 Pcs","offer_id":52445263364370,"sku":"LRPPIDAILUN943x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 20mm \/ 1 Pcs","offer_id":52445263397138,"sku":"LRPPIDAILUN944x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 22mm \/ 1 Pcs","offer_id":52445263429906,"sku":"LRPPIDAILUN945x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 24mm \/ 1 Pcs","offer_id":52445263462674,"sku":"LRPPIDAILUN946x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 25mm \/ 1 Pcs","offer_id":52445263495442,"sku":"LRPPIDAILUN947x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"80mm x 30mm \/ 1 Pcs","offer_id":52445263528210,"sku":"LRPPIDAILUN948x1","price":56.0,"currency_code":"USD","in_stock":true},{"title":"100mm x 8mm \/ 1 Pcs","offer_id":52445263560978,"sku":"LRPPIDAILUN949x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 10mm \/ 1 Pcs","offer_id":52445263593746,"sku":"LRPPIDAILUN950x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 12mm \/ 1 Pcs","offer_id":52445263626514,"sku":"LRPPIDAILUN951x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 13mm \/ 1 Pcs","offer_id":52445263659282,"sku":"LRPPIDAILUN952x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 14mm \/ 1 Pcs","offer_id":52445263692050,"sku":"LRPPIDAILUN953x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 15mm \/ 1 Pcs","offer_id":52445263724818,"sku":"LRPPIDAILUN954x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 16mm \/ 1 Pcs","offer_id":52445263757586,"sku":"LRPPIDAILUN955x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 18mm \/ 1 Pcs","offer_id":52445263790354,"sku":"LRPPIDAILUN956x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 20mm \/ 1 Pcs","offer_id":52445263823122,"sku":"LRPPIDAILUN957x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 22mm \/ 1 Pcs","offer_id":52445263855890,"sku":"LRPPIDAILUN958x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 24mm \/ 1 Pcs","offer_id":52445263888658,"sku":"LRPPIDAILUN959x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 25mm \/ 1 Pcs","offer_id":52445263921426,"sku":"LRPPIDAILUN960x1","price":65.18,"currency_code":"USD","in_stock":true},{"title":"100mm x 30mm \/ 1 Pcs","offer_id":52445263954194,"sku":"LRPPIDAILUN961x1","price":65.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture8of67_cc5e58c3-b80d-46bc-a920-2625f1c281ea.jpg?v=1783598268","url":"https:\/\/homediyer.com\/products\/aluminium-single-slot-belt-pulleys-od-40-100mm-a-type-triangle-belt","provider":"HomeDIYer","version":"1.0","type":"link"}