{"product_id":"module-2-spur-gear-stainless-steel-motor-pinion-flat-gear-precision","title":"Module 2 Spur Gear 15-30 Tooth Stainless Steel Motor Pinion Flat Gear Precision","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 2 Stainless Steel Spur Gear — Precision Pinion Flat Gear for Motors \u0026amp; Drives\u003c\/h2\u003e\n\u003cp\u003eWhen a stripped or undersized gear brings your motor drive, conveyor, or robotics project to a halt, you need a replacement that fits exactly right the first time. These Module 2 stainless steel spur gears are engineered for makers, mechanical engineers, and DIY builders who demand dimensional accuracy and corrosion resistance in a single, ready-to-install component.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from stainless steel to Module 2 (2mm\/tooth pitch) specification, with tooth counts ranging from 15 to 30 teeth and bore sizes from 8mm (0.31 in) to 25mm (0.98 in), all supplied with a precision-cut keyway for positive shaft engagement. Outer diameters scale from approximately 34mm (1.34 in) for the 15-tooth variant up to approximately 64mm (2.52 in) for the 30-tooth variant.\u003c\/p\u003e\n\u003cp\u003eTypical applications include DC motor pinion drives in robotics and automation, CNC axis drive trains requiring a module 2 stainless steel pinion gear, and general-purpose power transmission in food-processing or wet environments where a corrosion-resistant spur gear is essential.\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 2 gear systems. Mates with any Module 2 rack, pinion, or mating spur gear. Verify bore size and keyway dimensions against your shaft before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Module 2 Stainless Steel Spur Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩 \u003cstrong\u003eStainless Steel Construction\u003c\/strong\u003e\u003cp\u003eMachined from stainless steel for reliable corrosion resistance in humid, wet, or chemically exposed environments — no additional coating required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐 \u003cstrong\u003eModule 2 Precision Tooth Profile\u003c\/strong\u003e\u003cp\u003eManufactured to Module 2 (m=2) standard with accurate involute tooth geometry, ensuring smooth meshing and minimal backlash with any compatible Module 2 gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯 \u003cstrong\u003eWide Tooth Count Range (15–30 Teeth)\u003c\/strong\u003e\u003cp\u003eNine tooth-count options from 15T to 30T let you dial in the exact gear ratio your drive system requires without custom machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔑 \u003cstrong\u003eKeyway Bore for Positive Shaft Lock\u003c\/strong\u003e\u003cp\u003eEvery bore option includes a precision-cut keyway (3mm–8mm depending on bore size) to eliminate shaft slippage under load — critical for motor pinion applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚖️ \u003cstrong\u003eMultiple Bore Sizes (8mm–25mm)\u003c\/strong\u003e\u003cp\u003eBore options from 8mm to 25mm cover the most common motor and gearbox shaft diameters, reducing the need for custom boring or adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🏭 \u003cstrong\u003eBroad Application Compatibility\u003c\/strong\u003e\u003cp\u003eSuitable for DC motor drives, stepper motor pinions, CNC machines, conveyor systems, and robotics — anywhere a reliable Module 2 flat spur gear is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Module 2 Spur Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e2 (m = 2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e15 \/ 16 \/ 18 \/ 20 \/ 22 \/ 24 \/ 25 \/ 28 \/ 30 Teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Size\u003c\/th\u003e\n\u003ctd\u003e8mm – 25mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Width\u003c\/th\u003e\n\u003ctd\u003e3mm – 8mm (matched to bore; see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003e~34mm – ~64mm (scales with tooth count)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eInvolute, 20° Pressure Angle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Face Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural stainless (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pcs (single gear)\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 tooth count determines your gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For example, pairing a 15-tooth pinion with a 30-tooth gear gives a 2:1 reduction. Choose a tooth count that achieves your target speed or torque ratio while keeping the outer diameter within your housing clearance.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I select for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or gearbox output shaft diameter with a caliper. Select the bore size that matches your shaft exactly — for example, a 12mm shaft requires the \"12mm + 4mm Keyway\" option. The keyway width is pre-matched to each bore size, so no additional machining is needed if your shaft has a standard keyway.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears strong enough for high-torque motor drives?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStainless steel offers good tensile strength suitable for moderate-to-high torque applications in Module 2 drives. For very high shock-load or heavy industrial duty cycles, verify the calculated tangential load against the gear's face width and material yield strength. These gears are well-suited for robotics, CNC, and light-to-medium industrial drives.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these gears resist rust in wet or outdoor environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Stainless steel provides inherent corrosion resistance without additional coatings, making these gears suitable for food-processing equipment, marine-adjacent environments, and outdoor machinery where moisture exposure is a concern. For highly aggressive chemical environments, confirm compatibility with your specific media.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears with a Module 2 rack or worm gear?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears will mesh correctly with any Module 2 spur rack or mating spur gear. They are not designed to mesh with worm gears, bevel gears, or gears of a different module. Always confirm the mating component is also Module 2 before ordering.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the tooth count options — how does it affect size?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a Module 2 gear, the pitch diameter equals 2 × tooth count (in mm). A 15-tooth gear has a ~30mm pitch diameter; a 30-tooth gear has a ~60mm pitch diameter. The outer (tip) diameter adds approximately 4mm (one module on each side), so the 15T gear is roughly 34mm OD and the 30T gear is roughly 64mm OD. Choose based on your housing space and the gear ratio you need.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to purchase a key separately?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe gear is supplied with a precision-machined keyway bore, but the key (the small rectangular metal piece that fits the keyway) is not included. Standard metric keys matching each keyway width are widely available at hardware and engineering suppliers. Refer to the bore option name for the keyway width (e.g., \"12mm + 4mm Keyway\" uses a 4mm-wide key).\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your tooth count, 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 tooth count determines your gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For example, pairing a 15-tooth pinion with a 30-tooth gear gives a 2:1 reduction. Choose a tooth count that achieves your target speed or torque ratio while keeping the outer diameter within your housing clearance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which bore size should I select for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor or gearbox output shaft diameter with a caliper. Select the bore size that matches your shaft exactly. The keyway width is pre-matched to each bore size, so no additional machining is needed if your shaft has a standard keyway.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears strong enough for high-torque motor drives?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Stainless steel offers good tensile strength suitable for moderate-to-high torque applications in Module 2 drives. These gears are well-suited for robotics, CNC, and light-to-medium industrial drives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will these gears resist rust in wet or outdoor environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Stainless steel provides inherent corrosion resistance without additional coatings, making these gears suitable for food-processing equipment, marine-adjacent environments, and outdoor machinery where moisture exposure is a concern.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears with a Module 2 rack or worm gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears will mesh correctly with any Module 2 spur rack or mating spur gear. They are not designed to mesh with worm gears, bevel gears, or gears of a different module.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the tooth count options — how does it affect size?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For a Module 2 gear, the pitch diameter equals 2 × tooth count (in mm). A 15-tooth gear has a ~30mm pitch diameter; a 30-tooth gear has a ~60mm pitch diameter. The outer diameter adds approximately 4mm, so the 15T gear is roughly 34mm OD and the 30T gear is roughly 64mm OD.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need to purchase a key separately?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The gear is supplied with a precision-machined keyway bore, but the key itself is not included. Standard metric keys matching each keyway width are widely available at hardware and engineering suppliers.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Module 2【15 Tooth】 \/ 8mm + 3mm Keyway \/ 1 pcs","offer_id":52442019954962,"sku":"PENGJGJXCD3740x1","price":34.14,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 10mm + 4mm Keyway \/ 1 pcs","offer_id":52442019987730,"sku":"PENGJGJXCD3741x1","price":33.7,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 12mm + 4mm Keyway \/ 1 pcs","offer_id":52442020020498,"sku":"PENGJGJXCD3742x1","price":33.32,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 14mm + 5mm Keyway \/ 1 pcs","offer_id":52442020053266,"sku":"PENGJGJXCD3743x1","price":32.78,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 15mm + 5mm Keyway \/ 1 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