{"product_id":"module-1-5-steel-worm-shaft-brass-worm-gear-wheel-20-25-30-40-tooth-precision","title":"Module 1.5 Steel Worm Shaft, Brass Worm Gear Wheel 20\/25\/30\/40 Tooth, Precision","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 1.5 Steel Worm Shaft \u0026amp; Brass Worm Gear Wheel — Precision-Matched Drive Components\u003c\/h2\u003e\n\u003cp\u003eWhen your motion-control build demands repeatable torque transfer and zero-backlash engagement, mismatched or undersized worm drive components become the weakest link. Engineers, robotics builders, and industrial maintenance teams who need a reliable, drop-in worm gear set will find this module 1.5 pairing engineered to perform across continuous-duty cycles.\u003c\/p\u003e\n\u003cp\u003eThis listing covers two component families sold individually: C45 carbon steel worm shafts available in Type B, Type C, and Type L configurations, and brass worm gear wheels in 20, 25, 30, and 40 tooth counts. Bore diameters range from 8 mm (0.31 in) to 20 mm (0.79 in), with keyed options from 12 mm upward to suit standard shaft-key fits. All components are machined to Module 1.5 (m = 1.5) geometry for direct interchangeability within the same module family.\u003c\/p\u003e\n\u003cp\u003eTypical applications include low-speed, high-torque conveyor drives, rotary indexing tables, CNC router axis drives, robotic joint actuators, and DIY automation rigs where a compact right-angle drive with inherent self-locking characteristics is required.\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 Module 1.5 (m = 1.5) worm gear systems. Worm shafts and worm gear wheels in this listing are matched to the same module and pressure angle — confirm your existing gearbox module before ordering. Bore size and keyway must match your shaft diameter.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Module 1.5 Worm Shaft \u0026amp; Worm Gear Wheel Components\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eC45 Carbon Steel Worm Shafts\u003c\/strong\u003e\u003cbr\u003e\nThree shaft types (B, C, L) cover different length-to-diameter ratios and mounting configurations, giving you flexibility for compact or extended drive layouts.\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🟡\u003c\/span\u003e\n\u003cstrong\u003eBrass Worm Gear Wheels\u003c\/strong\u003e\u003cbr\u003e\nBrass construction provides natural lubricity against the steel worm, reducing wear and operating noise — a proven material pairing for worm drive longevity.\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n\u003cstrong\u003eModule 1.5 Precision Geometry\u003c\/strong\u003e\u003cbr\u003e\nMachined to m = 1.5 module specification, ensuring correct tooth engagement, consistent pitch diameter (≈ 0.666 in \/ 16.9 mm reference), and interchangeability with other m1.5 components.\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔑\u003c\/span\u003e\n\u003cstrong\u003eKeyed Bore Options\u003c\/strong\u003e\u003cbr\u003e\nBore sizes from 12 mm upward include standard keyway cuts (4 mm or 5 mm \/ 6 mm depending on bore), enabling positive torque transmission without set-screw slippage.\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦷\u003c\/span\u003e\n\u003cstrong\u003eFour Tooth Count Options (20 \/ 25 \/ 30 \/ 40T)\u003c\/strong\u003e\u003cbr\u003e\nSelect the gear ratio that fits your application — higher tooth counts yield greater reduction ratios when paired with a single-start worm shaft.\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n\u003cstrong\u003eSelf-Locking Drive Characteristic\u003c\/strong\u003e\u003cbr\u003e\nThe worm-and-wheel geometry provides inherent back-drive resistance at typical lead angles, useful for holding loads without a separate brake in vertical or positioning applications.\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 — Module 1.5 Worm Shaft \u0026amp; Worm Gear Wheel\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1.5 (m = 1.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorm Shaft Material\u003c\/th\u003e\n\u003ctd\u003eC45 Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorm Shaft Types\u003c\/th\u003e\n\u003ctd\u003eType B, Type C, Type L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorm Gear Wheel Material\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\u003c\/th\u003e\n\u003ctd\u003e4 mm (12 mm bore) \/ 5 mm (14–16 mm bore) \/ 6 mm (18–20 mm bore)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (reference)\u003c\/th\u003e\n\u003ctd\u003e≈ 0.666 in (16.9 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLead Angle\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc (sold individually)\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 for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe gear ratio of a worm drive equals the number of teeth on the worm gear wheel divided by the number of starts on the worm shaft. For a single-start worm shaft, a 20-tooth wheel gives a 20:1 ratio, a 25-tooth gives 25:1, a 30-tooth gives 30:1, and a 40-tooth gives 40:1. Choose a higher tooth count when you need greater torque multiplication and lower output speed. For lighter loads or faster output, a lower tooth count is appropriate.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the worm shaft and worm gear wheel sold as a matched pair?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNo — each component is sold individually (1 pc per order). You will need to add both a worm shaft and a worm gear wheel to your cart separately. All items in this listing share the same Module 1.5 specification, so any shaft type (B, C, or L) is geometrically compatible with any of the brass worm gear wheels listed here.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size and keyway should I select?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the bore diameter to your motor or drive shaft outer diameter. For shafts 12 mm and above, keyed bore options are available — the keyway width is 4 mm for 12 mm bores, 5 mm for 14–16 mm bores, and 6 mm for 18–20 mm bores. If your shaft is 8 mm or 10 mm, select the plain bore option. Always verify your shaft diameter with calipers before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy use brass for the worm gear wheel instead of steel?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePairing a harder steel worm with a softer brass wheel is a deliberate engineering choice. Brass has natural lubricity that reduces friction and heat generation during meshing. It also allows the softer wheel to wear preferentially, protecting the more expensive or harder-to-replace worm shaft. This material combination is standard practice in worm drive design for moderate-load, continuous-duty applications.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this worm drive self-lock under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eModule 1.5 single-start worm drives typically exhibit self-locking behavior due to the low lead angle, meaning the output shaft cannot back-drive the input under static load. This is useful for holding a position without a separate brake. However, self-locking is not guaranteed under all dynamic or vibration conditions — for safety-critical holding applications, always use a dedicated mechanical brake in addition to the worm drive.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat lubrication is recommended for these worm drive components?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor steel-on-brass worm drives, a gear oil with EP (extreme pressure) additives or a dedicated worm gear oil (ISO VG 220 or 320 grade) is recommended. Avoid greases with incompatible additives that can attack brass. Ensure the gear housing retains adequate lubricant at the mesh point, especially for vertical-shaft orientations where oil may drain away from the contact zone.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these components in a custom gearbox housing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. These are bare components intended for integration into your own housing or gearbox design. You will need to design or source appropriate bearing supports for both the worm shaft and the wheel shaft, maintain correct center distance based on the module 1.5 geometry, and provide adequate lubrication. Contact us to confirm exact dimensional drawings if you need them for housing design.\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, Bore Size, and Amount 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 for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The gear ratio equals the number of teeth on the worm gear wheel divided by the number of starts on the worm shaft. A single-start worm with a 20-tooth wheel gives 20:1, 25-tooth gives 25:1, 30-tooth gives 30:1, and 40-tooth gives 40:1. Choose higher tooth counts for greater torque multiplication and lower output speed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are the worm shaft and worm gear wheel sold as a matched pair?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No — each component is sold individually (1 pc per order). All items share Module 1.5 specification, so any shaft type is compatible with any brass worm gear wheel in this listing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore size and keyway should I select?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the bore diameter to your shaft OD. Keyway widths: 4 mm for 12 mm bore, 5 mm for 14–16 mm bore, 6 mm for 18–20 mm bore. Plain bore available for 8 mm and 10 mm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why use brass for the worm gear wheel instead of steel?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass provides natural lubricity against the steel worm, reducing friction and heat. The softer brass wheel wears preferentially, protecting the worm shaft — a standard engineering practice for moderate-load worm drives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this worm drive self-lock under load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Module 1.5 single-start worm drives typically self-lock due to the low lead angle. For safety-critical holding applications, always use a dedicated mechanical brake in addition to the worm drive.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What lubrication is recommended?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use a gear oil with EP additives or a dedicated worm gear oil (ISO VG 220 or 320 grade). Avoid greases with additives that can attack brass.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these components in a custom gearbox housing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. These are bare components for integration into your own housing. You will need bearing supports, correct center distance based on Module 1.5 geometry, and adequate lubrication. Contact us for dimensional drawings.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Worm Shaft | Type L | C45 Carbon Steel \/ Unavailable \/ 1 pcs","offer_id":52443549040914,"sku":"PENGJGJXCD4198x1","price":121.03,"currency_code":"USD","in_stock":true},{"title":"Worm Shaft | Type B | C45 Carbon Steel \/ 8mm \/ 1 pcs","offer_id":52443549073682,"sku":"PENGJGJXCD4199x1","price":40.73,"currency_code":"USD","in_stock":true},{"title":"Worm Shaft | Type B | C45 Carbon Steel \/ 10mm \/ 1 pcs","offer_id":52443549106450,"sku":"PENGJGJXCD4200x1","price":39.7,"currency_code":"USD","in_stock":true},{"title":"Worm Shaft | Type B | C45 Carbon Steel \/ 12mm + 4mm Keyway \/ 1 pcs","offer_id":52443549139218,"sku":"PENGJGJXCD4201x1","price":38.47,"currency_code":"USD","in_stock":true},{"title":"Worm Shaft | Type C | C45 Carbon Steel \/ 8mm \/ 1 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