{"product_id":"spur-gear-module-1-stainless-steel-12-120-tooth-motor-pinion-flat-gear-precision","title":"Spur Gear Module 1 Stainless Steel 12-120 Tooth Motor Pinion Flat Gear Precision","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eModule 1 Stainless Steel Spur Gear — Precision Pinion for CNC, Robotics \u0026amp; Automation\u003c\/h2\u003e\n    \u003cp\u003eWhen a stripped or undersized gear brings your build to a halt, every minute of downtime costs you. Whether you are a robotics engineer, a CNC hobbyist, or a small-batch automation builder, finding a dimensionally accurate, corrosion-resistant spur gear in the exact tooth count you need should not be a project in itself. These Module 1 stainless steel spur gears are stocked across a wide range of tooth counts and bore sizes so you can source the right pinion without compromise.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from stainless steel to Module 1 (1 mm\/tooth pitch) specification. The tooth range spans 12 to 120 teeth, covering pitch diameters from approximately 12 mm (0.47 in) up to 120 mm (4.72 in). Bore options run from 6 mm plain bore through to 18 mm with a 6 mm keyway, with intermediate keyway sizes at 8, 10, 12, 14, 15, 16, and 17 mm, giving you a secure shaft fit without custom machining.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include motor pinion drives in desktop CNC routers, rack-and-pinion linear actuators for 3D printer gantries, and gear-reduction stages in small conveyor or pick-and-place automation. The stainless steel construction also suits food-adjacent or humid-environment applications where mild steel would corrode.\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 1 standard — meshes with any Module 1 rack, pinion, or mating gear. Verify bore diameter and keyway dimensions against your shaft spec before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These Module 1 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\u003eWide Tooth Range (12–120T)\u003c\/strong\u003e\n        \u003cp\u003eCovers small motor pinions up to large driven gears in a single product family, reducing the number of suppliers you need to manage.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eMultiple Bore \u0026amp; Keyway Options\u003c\/strong\u003e\n        \u003cp\u003ePlain 6 mm bore for small shafts; keyed bores from 8 mm to 18 mm for positive torque transmission without set-screw slip.\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\u003eResists oxidation in humid, washdown, or lightly corrosive environments where carbon steel gears would degrade over time.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eModule 1 Precision Standard\u003c\/strong\u003e\n        \u003cp\u003eMachined to Module 1 (1 mm circular pitch per tooth), ensuring accurate mesh with any standard M1 rack or mating gear.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\n        \u003cstrong\u003eFlat Gear Profile for Compact Drives\u003c\/strong\u003e\n        \u003cp\u003eSpur (flat) tooth geometry transmits power efficiently in parallel-shaft arrangements, keeping your drivetrain compact and predictable.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eSingle-Piece Ordering\u003c\/strong\u003e\n        \u003cp\u003eAvailable in 1 pc increments so you can replace a single failed gear or prototype a new drive stage without committing to bulk quantities.\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 1 Stainless Steel Spur Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1 (1 mm\/tooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e12 – 120 teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter Range\u003c\/th\u003e\n\u003ctd\u003e12 mm – 120 mm (0.47 in – 4.72 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard)\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 Options\u003c\/th\u003e\n\u003ctd\u003e6 mm plain; 8, 10, 12, 14, 15, 16, 17, 18 mm with keyway\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eKeyway Dimensions\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFace Width\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\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eExternal Spur Gear (Flat \/ Pinion)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eCNC, robotics, automation, 3D printers, conveyor drives\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\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 diameter (Tooth Count × Module = Pitch Diameter in mm). For a motor pinion, choose a smaller tooth count (12–20T) to achieve speed reduction when paired with a larger driven gear. For direct-drive or low-reduction stages, a higher tooth count (30T+) reduces tooth load and noise. Match the gear ratio to your required output speed and torque.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich bore size should I select?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or shaft diameter precisely with calipers. Select the bore that matches your shaft OD. If your shaft has a keyway, choose the corresponding keyed bore option (e.g., 8 mm + 3 mm Keyway for an 8 mm keyed shaft). A plain 6 mm bore is suitable for smooth shafts secured with a set screw or adhesive.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears strong enough for my torque load?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStainless steel Module 1 spur gears are well-suited for light-to-medium duty applications typical of CNC routers, 3D printers, and small automation systems. For heavy industrial loads or shock loading, consult a gear strength calculation (Lewis equation) using the specific face width and material yield strength. Contact us to confirm specifications if you have a demanding application.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill these gears corrode in humid or wet environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStainless steel offers significantly better corrosion resistance than carbon steel or mild steel gears. These gears are suitable for humid workshops, light washdown environments, and food-adjacent machinery where occasional moisture exposure is expected. For continuous immersion or aggressive chemical exposure, additional sealing or a different alloy may be required.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this gear mesh with my existing Module 1 rack or gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Any Module 1 gear or rack with a matching pressure angle (standard 20°) will mesh correctly with these gears regardless of material or brand. Confirm the pressure angle of your existing components before ordering if you are unsure.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between a plain bore and a keyed bore?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA plain bore relies on a set screw or interference fit to transmit torque — suitable for low-torque or prototype applications. A keyed bore includes a machined slot (keyway) that accepts a key inserted into a matching slot on the shaft, providing a positive mechanical connection that prevents rotational slip under higher torque loads. For motor-driven applications, a keyed bore is generally recommended.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I order just one gear, or is there a minimum quantity?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears are available in single-piece (1 pc) quantities. This makes them ideal for prototyping, replacement of a single worn gear, or small-batch builds where you only need one or a few pieces of a specific tooth count and bore combination.\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 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 for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The tooth count determines the pitch diameter (Tooth Count x Module = Pitch Diameter in mm). For a motor pinion, choose a smaller tooth count (12-20T) to achieve speed reduction when paired with a larger driven gear. For direct-drive or low-reduction stages, a higher tooth count (30T+) reduces tooth load and noise.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which bore size should I select?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor or shaft diameter precisely with calipers. Select the bore that matches your shaft OD. If your shaft has a keyway, choose the corresponding keyed bore option. A plain 6 mm bore is suitable for smooth shafts secured with a set screw or adhesive.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears strong enough for my torque load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Stainless steel Module 1 spur gears are well-suited for light-to-medium duty applications typical of CNC routers, 3D printers, and small automation systems. For heavy industrial loads, consult a gear strength calculation using the specific face width and material yield strength.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will these gears corrode in humid or wet environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Stainless steel offers significantly better corrosion resistance than carbon steel or mild steel gears. These gears are suitable for humid workshops, light washdown environments, and food-adjacent machinery where occasional moisture exposure is expected.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing Module 1 rack or gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Any Module 1 gear or rack with a matching pressure angle (standard 20 degrees) will mesh correctly with these gears regardless of material or brand.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between a plain bore and a keyed bore?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A plain bore relies on a set screw or interference fit to transmit torque. A keyed bore includes a machined slot that accepts a key inserted into a matching slot on the shaft, providing a positive mechanical connection that prevents rotational slip under higher torque loads.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I order just one gear, or is there a minimum quantity?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears are available in single-piece (1 pc) quantities, ideal for prototyping, replacement of a single worn gear, or small-batch builds.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Module 1【12 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442452492562,"sku":"PENGJGJXCD4037x1","price":4.07,"currency_code":"USD","in_stock":true},{"title":"Module 1【13 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442452525330,"sku":"PENGJGJXCD4038x1","price":4.07,"currency_code":"USD","in_stock":true},{"title":"Module 1【14 Tooth】 \/ 6mm \/ 1 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