{"product_id":"module-1-5m-brass-worm-gear-wheel-20-25-30-40t-bore-8-20mm","title":"Module 1.5M Brass Worm Gear Wheel 20\/25\/30\/40T Teeth  Worm Gears Bore 8-20mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 1.5M Brass Worm Gear Wheel — Smooth, Low-Backlash Power Transmission for DIY and Industrial Builds\u003c\/h2\u003e\n\u003cp\u003eWhen a motion-control project demands a reliable right-angle speed reduction with minimal backlash, the wrong gear material can mean stripped teeth, excessive noise, and premature failure. Mechanical engineers, robotics builders, and workshop DIYers who need a dependable worm gear wheel that pairs cleanly with a 1.5-module worm shaft will find this brass wheel a practical, long-lasting solution.\u003c\/p\u003e\n\u003cp\u003eThis worm gear wheel is machined from brass, a material valued for its self-lubricating properties, corrosion resistance, and compatibility with steel worm shafts. Available in four tooth counts — 20T, 25T, 30T, and 40T — with an outer diameter ranging from approximately 33 mm (1.30 in) for the 20T up to approximately 63 mm (2.48 in) for the 40T. Bore options span 8 mm to 20 mm, with keyway configurations (4 mm or 5 mm\/6 mm keyway) available on larger bore sizes for positive shaft engagement.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY rotary table drives and indexing fixtures, compact conveyor and actuator assemblies requiring high reduction ratios, and robotics joint mechanisms where a 1.5M worm gear set provides the torque multiplication needed for servo-driven axes.\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 to mesh with Module 1.5 (1.5M) worm shafts. Verify your worm shaft module before ordering. Bore and keyway dimensions must match your shaft diameter — select the correct variant above.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Module 1.5M Brass Worm Gear Wheels\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eBrass Construction\u003c\/strong\u003e — Naturally self-lubricating brass reduces friction against steel worm shafts, extending service life and lowering operating noise compared to cast iron alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eFour Tooth Count Options\u003c\/strong\u003e — Choose 20T, 25T, 30T, or 40T to dial in your reduction ratio. Higher tooth counts deliver greater torque multiplication for heavier loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003ePrecision Bore Range 8–20 mm\u003c\/strong\u003e — Eight bore variants cover shafts from 8 mm to 20 mm. Keyway slots (4 mm, 5 mm, or 6 mm) on applicable variants prevent rotational slip under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eRight-Angle Power Transmission\u003c\/strong\u003e — Worm gear geometry provides inherent self-locking characteristics at high reduction ratios, useful for positioning and holding applications without a brake.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Material\u003c\/strong\u003e — Brass resists oxidation in moderately humid workshop and light industrial environments, reducing maintenance intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eDirect Drop-In Sizing\u003c\/strong\u003e — Standard Module 1.5 tooth profile ensures interchangeability with commercially available 1.5M worm shafts, simplifying sourcing for replacement or new builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Module 1.5M Worm Gear Wheel\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1.5M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e20T \/ 25T \/ 30T \/ 40T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e8 mm – 20 mm (0.31 in – 0.79 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Options\u003c\/th\u003e\n\u003ctd\u003e4 mm (12 mm bore) \/ 5 mm (14–16 mm bore) \/ 6 mm (18–20 mm bore) \/ None (8–10 mm bore)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFace Width (approx.)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eWorm Gear Wheel (Spur-cut worm wheel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural brass (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Worm Shaft Module\u003c\/th\u003e\n\u003ctd\u003e1.5M\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 (20T, 25T, 30T, or 40T)?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe tooth count determines your reduction ratio when paired with a single-start worm shaft: a 20T wheel gives 20:1 reduction, a 40T wheel gives 40:1. Choose a higher tooth count when you need more torque multiplication or slower output speed. For lighter loads or faster output, a 20T or 25T wheel is typically sufficient.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size should I select for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSelect the bore that matches your shaft diameter exactly. For shafts 8 mm or 10 mm, plain bore variants are available. For shafts 12 mm and above, keyway variants are offered — the keyway prevents the gear from rotating on the shaft under load. Measure your shaft with calipers before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this gear compatible with any 1.5M worm shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — this wheel is machined to the standard Module 1.5 tooth profile and will mesh correctly with any commercially available 1.5M single-start or multi-start worm shaft. Confirm the module (1.5M) and the lead angle of your worm shaft are compatible with your intended reduction ratio before assembly.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is brass compared to steel for worm gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass is softer than steel, which is intentional in worm gear design. The brass wheel acts as the sacrificial element, wearing gradually while protecting the harder steel worm shaft. This pairing reduces galling and noise. For light-to-medium duty applications — robotics, indexing tables, small actuators — brass worm wheels are the industry-standard choice.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes brass resist corrosion in workshop environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass offers good resistance to oxidation and mild moisture exposure, making it suitable for indoor workshop and light industrial use. It is not recommended for continuous immersion or highly corrosive chemical environments. For outdoor or wet applications, consider applying a light machine oil to the gear teeth periodically.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this worm gear self-lock when the motor is off?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eWorm gear sets with high reduction ratios (typically above 20:1 with a single-start worm) exhibit self-locking behavior, meaning the output shaft cannot back-drive the worm. This is useful for positioning applications where you want the load to hold position without a separate brake. However, self-locking is not guaranteed under vibration or shock loads — always verify with your specific worm shaft lead angle.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to lubricate this gear before use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass has inherent self-lubricating properties, but applying a light gear grease or machine oil to the tooth contact surfaces before first use will extend service life and reduce break-in wear. Re-lubricate periodically based on your duty cycle and operating environment.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Model (tooth count) and Bore size 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 (20T, 25T, 30T, or 40T)?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The tooth count determines your reduction ratio when paired with a single-start worm shaft: a 20T wheel gives 20:1 reduction, a 40T wheel gives 40:1. Choose a higher tooth count when you need more torque multiplication or slower output speed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore size should I select for my shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Select the bore that matches your shaft diameter exactly. For shafts 12 mm and above, keyway variants are offered to prevent rotation under load. Measure your shaft with calipers before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this gear compatible with any 1.5M worm shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — this wheel is machined to the standard Module 1.5 tooth profile and will mesh correctly with any commercially available 1.5M worm shaft.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is brass compared to steel for worm gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass is softer than steel by design — it acts as the sacrificial element, wearing gradually while protecting the harder steel worm shaft. This pairing reduces galling and noise, and is the industry-standard choice for light-to-medium duty worm gear applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does brass resist corrosion in workshop environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass offers good resistance to oxidation and mild moisture exposure, suitable for indoor workshop and light industrial use. Apply a light machine oil periodically for wet or outdoor environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this worm gear self-lock when the motor is off?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Worm gear sets with high reduction ratios (typically above 20:1 with a single-start worm) exhibit self-locking behavior. This is useful for positioning applications, but self-locking is not guaranteed under vibration or shock loads.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need to lubricate this gear before use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Applying a light gear grease or machine oil to the tooth contact surfaces before first use will extend service life and reduce break-in wear, even though brass has inherent self-lubricating properties.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"1.5M 20T \/ 8mm","offer_id":52443457061138,"sku":"GLFBQLPJGJXCD4205x1","price":16.31,"currency_code":"USD","in_stock":true},{"title":"1.5M 20T \/ 10mm","offer_id":52443457093906,"sku":"GLFBQLPJGJXCD4206x1","price":16.12,"currency_code":"USD","in_stock":true},{"title":"1.5M 20T \/ Bore 12mm + Keyway 4mm","offer_id":52443457126674,"sku":"GLFBQLPJGJXCD4207x1","price":15.9,"currency_code":"USD","in_stock":true},{"title":"1.5M 20T \/ Bore 14mm + Keyway 5mm","offer_id":52443457159442,"sku":"GLFBQLPJGJXCD4208x1","price":15.63,"currency_code":"USD","in_stock":true},{"title":"1.5M 20T \/ Bore 15mm + Keyway 5mm","offer_id":52443457192210,"sku":"GLFBQLPJGJXCD4209x1","price":15.49,"currency_code":"USD","in_stock":true},{"title":"1.5M 25T \/ 10mm","offer_id":52443457224978,"sku":"GLFBQLPJGJXCD4210x1","price":20.93,"currency_code":"USD","in_stock":true},{"title":"1.5M 25T \/ Bore 12mm + Keyway 4mm","offer_id":52443457257746,"sku":"GLFBQLPJGJXCD4211x1","price":20.66,"currency_code":"USD","in_stock":true},{"title":"1.5M 25T \/ Bore 14mm + Keyway 5mm","offer_id":52443457290514,"sku":"GLFBQLPJGJXCD4212x1","price":20.39,"currency_code":"USD","in_stock":true},{"title":"1.5M 25T \/ Bore 15mm + Keyway 5mm","offer_id":52443457323282,"sku":"GLFBQLPJGJXCD4213x1","price":20.25,"currency_code":"USD","in_stock":true},{"title":"1.5M 25T \/ Bore 16mm + Keyway 5mm","offer_id":52443457356050,"sku":"GLFBQLPJGJXCD4214x1","price":20.11,"currency_code":"USD","in_stock":true},{"title":"1.5M 30T \/ 10mm","offer_id":52443457388818,"sku":"GLFBQLPJGJXCD4215x1","price":28.95,"currency_code":"USD","in_stock":true},{"title":"1.5M 30T \/ Bore 12mm + Keyway 4mm","offer_id":52443457421586,"sku":"GLFBQLPJGJXCD4216x1","price":28.76,"currency_code":"USD","in_stock":true},{"title":"1.5M 30T \/ Bore 14mm + Keyway 5mm","offer_id":52443457454354,"sku":"GLFBQLPJGJXCD4217x1","price":28.49,"currency_code":"USD","in_stock":true},{"title":"1.5M 30T \/ Bore 15mm + Keyway 5mm","offer_id":52443457487122,"sku":"GLFBQLPJGJXCD4218x1","price":28.36,"currency_code":"USD","in_stock":true},{"title":"1.5M 30T \/ Bore 16mm + Keyway 5mm","offer_id":52443457519890,"sku":"GLFBQLPJGJXCD4219x1","price":28.14,"currency_code":"USD","in_stock":true},{"title":"1.5M 30T \/ Bore 18mm + Keyway 6mm","offer_id":52443457552658,"sku":"GLFBQLPJGJXCD4220x1","price":27.87,"currency_code":"USD","in_stock":true},{"title":"1.5M 40T \/ Bore 12mm + Keyway 4mm","offer_id":52443457585426,"sku":"GLFBQLPJGJXCD4221x1","price":47.31,"currency_code":"USD","in_stock":true},{"title":"1.5M 40T \/ Bore 14mm + Keyway 5mm","offer_id":52443457618194,"sku":"GLFBQLPJGJXCD4222x1","price":47.04,"currency_code":"USD","in_stock":true},{"title":"1.5M 40T \/ Bore 15mm + Keyway 5mm","offer_id":52443457650962,"sku":"GLFBQLPJGJXCD4223x1","price":46.91,"currency_code":"USD","in_stock":true},{"title":"1.5M 40T \/ Bore 16mm + Keyway 5mm","offer_id":52443457683730,"sku":"GLFBQLPJGJXCD4224x1","price":46.77,"currency_code":"USD","in_stock":true},{"title":"1.5M 40T \/ Bore 18mm + Keyway 6mm","offer_id":52443457716498,"sku":"GLFBQLPJGJXCD4225x1","price":46.44,"currency_code":"USD","in_stock":true},{"title":"1.5M 40T \/ Bore 20mm + Keyway 6mm","offer_id":52443457749266,"sku":"GLFBQLPJGJXCD4226x1","price":46.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture3of7_d7f7be34-3cab-45c4-b33c-0c9e094dfca8.jpg?v=1783348311","url":"https:\/\/homediyer.com\/products\/module-1-5m-brass-worm-gear-wheel-20-25-30-40t-bore-8-20mm","provider":"HomeDIYer","version":"1.0","type":"link"}