{"product_id":"spur-gear-module-2-stainless-steel-hub-12-30-tooth-motor-pinion","title":"Spur Gear Module 2 Stainless Steel with Hub 12 - 30 Tooth Motor Pinion Precision","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eModule 2 Stainless Steel Spur Gear with Hub — Precision Motor Pinion for Demanding Drive Systems\u003c\/h2\u003e\n    \u003cp\u003eWhen a loose or undersized pinion causes backlash, slippage, or premature wear in your drive train, the root cause is almost always a gear that wasn't machined to the tolerances your application demands. Engineers, robotics builders, and small-batch manufacturers who need a reliable, drop-in module 2 spur gear with an integrated hub will find this stainless steel motor pinion gear engineered to hold position under load.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from stainless steel and features an integrated hub for secure shaft mounting. The module 2 tooth profile covers 12 through 30 teeth, with bore sizes ranging from 8 mm (0.31 in) up to 25 mm (0.98 in). Keyway options — 4 mm, 5 mm, 6 mm, and 8 mm — are available on larger bore variants to prevent rotational slip under torque. Overall gear width and hub length vary by tooth count; see variant options for exact dimensions.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include DC motor pinion drives in robotics and automation platforms, CNC axis drive trains requiring repeatable positioning, and small-batch industrial machinery where a stainless steel spur gear with keyway bore resists corrosion in wash-down or humid environments.\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 Module 2 tooth profile. Meshes with any standard Module 2 spur or rack gear. Verify bore diameter 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-list\"\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eIntegrated Hub Design\u003c\/strong\u003e\n        \u003cp\u003eThe extended hub provides a longer contact surface for set screws or keyway engagement, reducing shaft wobble and improving torque transfer compared to hubless gears.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🦾\u003c\/span\u003e\n        \u003cstrong\u003eStainless Steel Construction\u003c\/strong\u003e\n        \u003cp\u003eMachined from stainless steel for corrosion resistance in humid, wash-down, or outdoor environments — a practical choice over carbon steel where surface rust is a concern.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eModule 2 Tooth Profile\u003c\/strong\u003e\n        \u003cp\u003eStandard Module 2 involute tooth form ensures smooth meshing with any compatible M2 gear or rack, with predictable load distribution across the full tooth face.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n        \u003cstrong\u003eWide Tooth Count Range (12–30T)\u003c\/strong\u003e\n        \u003cp\u003eFifteen tooth-count options from 12 to 30 teeth let you dial in the exact gear ratio needed for your motor pinion or intermediate drive stage without custom machining.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔑\u003c\/span\u003e\n        \u003cstrong\u003eKeyway Bore Options\u003c\/strong\u003e\n        \u003cp\u003eLarger bore variants include precision-cut keyways (4 mm, 5 mm, 6 mm, 8 mm) that lock the gear to the shaft under reversing or high-torque loads where a set screw alone is insufficient.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eMultiple Bore Sizes (8–25 mm)\u003c\/strong\u003e\n        \u003cp\u003eBore options from 8 mm to 25 mm cover the most common motor and gearbox output shaft diameters, minimizing the need for adapter bushings or custom boring.\u003c\/p\u003e\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 2 Stainless Steel Spur Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e12 \/ 13 \/ 14 \/ 15 \/ 16 \/ 17 \/ 18 \/ 20 \/ 21 \/ 22 \/ 23 \/ 24 \/ 25 \/ 28 \/ 30\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e8 mm \/ 10 mm \/ 12 mm \/ 14 mm \/ 15 mm \/ 16 mm \/ 17 mm \/ 18 mm \/ 19 mm \/ 20 mm \/ 22 mm \/ 24 mm \/ 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eKeyway Width\u003c\/th\u003e\n\u003ctd\u003e4 mm \/ 5 mm \/ 6 mm \/ 8 mm (bore-dependent; see variant options)\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\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eInvolute, Module 2\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\u003eHub\u003c\/th\u003e\n\u003ctd\u003eIntegrated\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\u003eHub Length\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\u003ePackage Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pc\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\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 the pitch circle diameter (PCD = Module × Teeth, so a 20-tooth M2 gear has a 40 mm PCD) and your gear ratio when paired with a mating gear. Choose a smaller tooth count (12–15T) for a compact motor pinion driving a larger driven gear, or a larger tooth count (20–30T) when you need a higher-speed output or a more balanced ratio. Always verify center distance with your mating gear before finalizing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo I need a keyway bore, or will a plain bore with a set screw work?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor light-duty or unidirectional loads, a plain bore (8 mm or 10 mm) with a set screw is often sufficient. For reversing loads, high torque, or applications where shaft slip would cause damage, select a keyway bore variant. The keyway mechanically locks the gear to the shaft and distributes torque across a larger contact area than a set screw alone.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs stainless steel strong enough for my drive application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStainless steel offers good tensile strength (typically 515–620 MPa for 304-grade) and excellent corrosion resistance. It is well-suited for moderate-load robotics, automation, and light industrial drives. For very high-torque or impact-load applications, consider whether a hardened alloy steel gear would be more appropriate. Contact us to confirm if you have specific load requirements.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this gear mesh with my existing Module 2 rack or spur gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — any standard Module 2 involute gear or rack with a 20° pressure angle will mesh correctly with these gears. Module (not pitch) is the governing parameter for metric gears. Do not attempt to mesh with Module 1.5, Module 2.5, or diametral-pitch gears, as the tooth profiles are incompatible.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I measure my shaft to select the correct bore size?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eUse a digital caliper to measure the shaft outer diameter at the mounting point. Select the bore size that matches your shaft diameter exactly — these gears are machined to close tolerances and are not intended to be bored out further. If your shaft has a keyway, measure the key width and select the matching keyway bore option (e.g., a 5 mm key requires a 5 mm keyway bore variant).\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat corrosion resistance can I expect from the stainless steel material?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStainless steel provides good resistance to atmospheric corrosion, light moisture, and many mild chemicals. It is suitable for humid environments, light wash-down conditions, and outdoor enclosures. For aggressive chemical environments or salt-spray exposure, consider whether additional surface treatment or a higher-grade stainless alloy is required for your specific conditions.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these gears in a robotics or 3D printer drive system?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The Module 2 stainless steel spur gear with hub is commonly used as a motor pinion in robotics drive trains, CNC axis drives, and extruder or filament-feed mechanisms where a compact, corrosion-resistant gear is needed. Verify that your motor shaft diameter matches the available bore options and that the gear ratio suits your speed and torque requirements.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Models 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 for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The tooth count determines the pitch circle diameter (PCD = Module × Teeth). Choose a smaller tooth count (12–15T) for a compact motor pinion driving a larger driven gear, or a larger tooth count (20–30T) for a higher-speed output or balanced ratio. Always verify center distance with your mating gear before finalizing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need a keyway bore, or will a plain bore with a set screw work?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For light-duty or unidirectional loads, a plain bore with a set screw is often sufficient. For reversing loads or high torque, select a keyway bore variant to mechanically lock the gear to the shaft.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is stainless steel strong enough for my drive application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Stainless steel offers good tensile strength and excellent corrosion resistance, suitable for moderate-load robotics, automation, and light industrial drives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing Module 2 rack or spur gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — any standard Module 2 involute gear or rack with a 20° pressure angle will mesh correctly. Do not attempt to mesh with Module 1.5, Module 2.5, or diametral-pitch gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I measure my shaft to select the correct bore size?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use a digital caliper to measure the shaft outer diameter at the mounting point. Select the bore size that matches your shaft diameter exactly. If your shaft has a keyway, measure the key width and select the matching keyway bore option.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What corrosion resistance can I expect from the stainless steel material?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Stainless steel provides good resistance to atmospheric corrosion, light moisture, and many mild chemicals, suitable for humid environments and light wash-down conditions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears in a robotics or 3D printer drive system?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The Module 2 stainless steel spur gear with hub is commonly used as a motor pinion in robotics drive trains, CNC axis drives, and extruder or filament-feed mechanisms.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Module 2【12 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442965639442,"sku":"PENGJGJXCD3878x1","price":23.92,"currency_code":"USD","in_stock":true},{"title":"Module 2【12 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442965672210,"sku":"PENGJGJXCD3879x1","price":23.73,"currency_code":"USD","in_stock":true},{"title":"Module 2【13 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442965704978,"sku":"PENGJGJXCD3880x1","price":25.42,"currency_code":"USD","in_stock":true},{"title":"Module 2【13 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442965737746,"sku":"PENGJGJXCD3881x1","price":25.28,"currency_code":"USD","in_stock":true},{"title":"Module 2【14 Tooth】 \/ 8mm \/ 1 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