{"product_id":"module-1m-ratio-1-2-white-pom-umbrella-bevel-gear-20-40-teeth-bore-5-6-8-10-12mm","title":"Module 1M Ratio 1:2 White POM Umbrella Bevel Gear 20\/40 Teeth Bore 5\/6\/8\/10\/12mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 1M POM Bevel Gear — Lightweight 1:2 Ratio Drive for Precision DIY Builds\u003c\/h2\u003e\n\u003cp\u003eWhen your project demands a reliable 90° power transmission without the weight or noise of metal gears, finding the right bevel gear can be frustrating. Hobbyists, robotics builders, and automation enthusiasts who need a compact, corrosion-resistant solution will find these Module 1M white POM umbrella bevel gears a practical fit for both prototyping and finished builds.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from white POM (polyoxymethylene) acetal, a self-lubricating engineering plastic known for its dimensional stability and low friction. Available in two tooth counts — 20 teeth and 40 teeth — paired in a 1:2 ratio, with bore sizes ranging from 5mm (~0.197\") to 12mm (~0.472\"). The module is 1M, making these gears compatible with standard metric gear systems.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include small CNC router axis drives, 3D printer extruder gearboxes, RC vehicle differentials, and light-duty conveyor direction-change assemblies — anywhere a quiet, low-inertia 90° bevel drive is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e Compatible with Module 1M metric gear systems. Pair the 20-tooth pinion with the 40-tooth gear for a 1:2 speed reduction ratio.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Module 1M POM Bevel Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003e1:2 Ratio Pairing\u003c\/strong\u003e\n\u003cp\u003e20-tooth pinion drives a 40-tooth gear for a clean 2:1 speed reduction at 90°, ideal for compact gearbox designs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e \u003cstrong\u003eWhite POM Acetal Construction\u003c\/strong\u003e\n\u003cp\u003eSelf-lubricating, dimensionally stable, and resistant to moisture and common chemicals — no additional lubrication required for light-duty use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔇\u003c\/span\u003e \u003cstrong\u003eLow-Noise Operation\u003c\/strong\u003e\n\u003cp\u003ePOM-on-POM or POM-on-metal meshing produces significantly less noise than all-metal gear pairs, keeping your build quiet under load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eMultiple Bore Options\u003c\/strong\u003e\n\u003cp\u003eChoose from 5mm, 6mm, 8mm, 10mm, or 12mm bore to match your shaft diameter directly — no bushing required in most cases.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🪶\u003c\/span\u003e \u003cstrong\u003eLightweight Design\u003c\/strong\u003e\n\u003cp\u003ePOM is significantly lighter than brass or steel, reducing rotational inertia and making these gears well-suited for battery-powered or weight-sensitive applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\n\u003cp\u003eOrder 1, 3, or 5 pieces per variant to match your project needs — whether you're prototyping a single axis or stocking spares for a production run.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Module 1M POM Bevel Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Ratio\u003c\/th\u003e\n\u003ctd\u003e1:2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count (Pinion \/ Gear)\u003c\/th\u003e\n\u003ctd\u003e20 Teeth \/ 40 Teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e5mm \/ 6mm \/ 8mm \/ 10mm \/ 12mm (see 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\u003eUmbrella Bevel Gear (straight bevel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eWhite POM (Polyoxymethylene \/ Acetal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft Angle\u003c\/th\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (20T)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (40T)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub \/ Boss Length\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSet Screw\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 3 \/ 5 pcs (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per piece)\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\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose between the 20-tooth and 40-tooth gear?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese two gears are designed to work together as a matched pair. The 20-tooth gear acts as the pinion (driver) and the 40-tooth gear acts as the driven gear, producing a 1:2 speed reduction ratio. If you need to reduce speed and increase torque, mount the 20T on your motor shaft and the 40T on your output shaft. You will need one of each to complete a functional bevel gear set.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I select for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect the bore that matches your shaft diameter exactly. Available bores are 5mm, 6mm, 8mm, 10mm, and 12mm. If your shaft is metric and falls within this range, choose the matching size. For imperial shafts, convert first — for example, a 1\/4\" shaft is approximately 6.35mm, so a 6mm bore would be too tight; contact us to confirm the best fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears strong enough for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eWhite POM bevel gears are well-suited for light-to-medium duty applications such as robotics, 3D printers, small CNC machines, and RC models. POM has a tensile strength of approximately 60–70 MPa and handles moderate torque reliably. For heavy industrial loads, high-impact environments, or continuous high-speed operation, a metal bevel gear would be more appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo POM gears resist corrosion and moisture?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. POM (acetal) has good resistance to moisture, fuels, solvents, and many common chemicals. It will not rust or corrode like metal gears, making it a practical choice for environments with occasional moisture exposure. However, POM is not recommended for prolonged immersion in strong acids or bases.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these gears require lubrication?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePOM is inherently self-lubricating, so no grease or oil is required for light-duty use. For higher loads or faster speeds, a small amount of dry PTFE lubricant or light machine oil can extend service life and reduce wear. Avoid petroleum-based greases that may degrade the plastic over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use just one gear, or do I need to buy both the 20T and 40T?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eEach variant listing sells one gear type (either 20T or 40T) in your chosen bore and quantity. To build a complete 1:2 bevel gear pair, you need one 20-tooth gear and one 40-tooth gear with matching or compatible bore sizes. If you are replacing a worn gear in an existing assembly, you can purchase just the tooth count you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these compatible with other Module 1M gears from different brands?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, Module 1M is a standardized metric gear specification. These gears will mesh correctly with any other Module 1M bevel gear of the same pressure angle (20°) and matching tooth geometry. Always verify the pressure angle and shaft angle (90°) when mixing gears from different sources.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Type, Bore, and Units above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"1M 20 Teeth \/ 5mm \/ 1","offer_id":52439381704978,"sku":"LXDJGJXCD2841x1","price":17.92,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 6mm \/ 1","offer_id":52439381737746,"sku":"LXDJGJXCD2842x1","price":17.92,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 8mm \/ 1","offer_id":52439381770514,"sku":"LXDJGJXCD2843x1","price":17.92,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 8mm \/ 1","offer_id":52439381803282,"sku":"LXDJGJXCD2844x1","price":23.64,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 10mm \/ 1","offer_id":52439381836050,"sku":"LXDJGJXCD2845x1","price":23.64,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 12mm \/ 1","offer_id":52439381868818,"sku":"LXDJGJXCD2846x1","price":23.64,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 5mm \/ 3","offer_id":52439381901586,"sku":"LXDJGJXCD2841x3","price":47.46,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 6mm \/ 3","offer_id":52439381934354,"sku":"LXDJGJXCD2842x3","price":47.46,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 8mm \/ 3","offer_id":52439381967122,"sku":"LXDJGJXCD2843x3","price":47.46,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 8mm \/ 3","offer_id":52439381999890,"sku":"LXDJGJXCD2844x3","price":67.16,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 10mm \/ 3","offer_id":52439382032658,"sku":"LXDJGJXCD2845x3","price":67.16,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 12mm \/ 3","offer_id":52439382065426,"sku":"LXDJGJXCD2846x3","price":67.16,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 5mm \/ 5","offer_id":52439382098194,"sku":"LXDJGJXCD2841x5","price":77.76,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 6mm \/ 5","offer_id":52439382130962,"sku":"LXDJGJXCD2842x5","price":77.76,"currency_code":"USD","in_stock":true},{"title":"1M 20 Teeth \/ 8mm \/ 5","offer_id":52439382163730,"sku":"LXDJGJXCD2843x5","price":77.76,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 8mm \/ 5","offer_id":52439382196498,"sku":"LXDJGJXCD2844x5","price":110.57,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 10mm \/ 5","offer_id":52439382229266,"sku":"LXDJGJXCD2845x5","price":110.57,"currency_code":"USD","in_stock":true},{"title":"1M 40 Teeth \/ 12mm \/ 5","offer_id":52439382262034,"sku":"LXDJGJXCD2846x5","price":110.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_6cf7fadb-c10b-4ed3-8c83-b94a2d0f6090.jpg?v=1783410626","url":"https:\/\/homediyer.com\/products\/module-1m-ratio-1-2-white-pom-umbrella-bevel-gear-20-40-teeth-bore-5-6-8-10-12mm","provider":"HomeDIYer","version":"1.0","type":"link"}