{"product_id":"blue-spur-gear-15-tooth-module-2-3mm-3-17mm-pinion-motor-gear","title":"Blue Spur Gear 15 Tooth Module 2.3mm 3.17mm Pinion Motor Gear Flat Plastic Blue","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eBlue Spur Gear 15 Tooth — Reliable Pinion Motor Gear for Precision Drive Systems\u003c\/h2\u003e\n    \u003cp\u003eWhen a stripped or undersized gear brings your build to a halt, finding an exact-spec replacement fast is everything. Whether you are a robotics hobbyist, RC vehicle builder, or small-machine engineer, this 15-tooth flat plastic spur gear delivers consistent mesh engagement and smooth torque transfer in compact drive trains.\u003c\/p\u003e\n    \u003cp\u003eThis pinion motor gear is molded from engineering-grade blue plastic (ABS-type), offering a balance of light weight and adequate rigidity for low-to-medium load applications. Available in two bore sizes — 2.3 mm (~0.091 in) and 3.17 mm (~0.125 in, 1\/8 in) — with a module pitch of 2.3 mm or 3.17 mm respectively. The flat gear profile suits standard spur-gear mesh configurations without requiring a hub or set-screw collar.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include: replacement pinion gears for hobby-grade RC car motor shafts, drive gears in small robotic arm joints requiring a 15-tooth count, and stage-one reduction gears in DIY conveyor or actuator projects where a lightweight plastic gear reduces system inertia.\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 Fits motor shafts of 2.3 mm or 3.17 mm (1\/8 in) diameter. Designed for standard module spur-gear mesh. Verify module and bore size against your mating gear before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These Blue Spur Gear Pinion Motor Gears\u003c\/h2\u003e\n    \u003cdiv class=\"hdiy-list\"\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n        \u003cstrong\u003eDistinct Blue Color Coding\u003c\/strong\u003e\n        \u003cp\u003eThe vivid blue finish makes it easy to identify gear size and module at a glance during assembly or maintenance, reducing mis-installation risk in multi-gear drive trains.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n        \u003cstrong\u003e15-Tooth Flat Spur Profile\u003c\/strong\u003e\n        \u003cp\u003eA 15-tooth count provides a useful reduction ratio when paired with larger driven gears, suitable for motor pinion applications in RC, robotics, and small automation builds.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eDual Bore Options: 2.3 mm \u0026amp; 3.17 mm\u003c\/strong\u003e\n        \u003cp\u003eChoose the bore that matches your motor shaft — 2.3 mm for smaller hobby motors or 3.17 mm (1\/8 in) for standard RC and robotics motors — ensuring a snug, wobble-free fit.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🪶\u003c\/span\u003e\n        \u003cstrong\u003eLightweight Engineering Plastic Construction\u003c\/strong\u003e\n        \u003cp\u003eMolded from rigid ABS-type plastic, these gears keep rotating mass low, which is critical for responsive acceleration in RC drivetrains and fast-cycle robotic joints.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eFlexible Pack Quantities (1–500 pcs)\u003c\/strong\u003e\n        \u003cp\u003eOrder a single gear for a quick repair or up to 500 pieces for production runs and workshop stock — quantity pricing scales to keep per-unit cost efficient at volume.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eDirect Drop-In Replacement Geometry\u003c\/strong\u003e\n        \u003cp\u003eFlat gear face and standard module pitch allow direct substitution for OEM pinion gears in many hobby-grade platforms without modification to the motor mount or gear housing.\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 — Plastic Spur Pinion Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e15 teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore \/ Shaft Diameter\u003c\/th\u003e\n\u003ctd\u003e2.3 mm (≈0.091 in) or 3.17 mm (≈0.125 in \/ 1\/8 in) — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\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\u003eFlat spur gear (pinion)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eEngineering plastic (ABS-type)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlue\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\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHub \/ Set Screw\u003c\/th\u003e\n\u003ctd\u003eNo hub; press-fit or friction-fit bore\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Quantities\u003c\/th\u003e\n\u003ctd\u003e1, 5, 10, 20, 50, 100, 200, 300, 400, 500 pcs\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 between the 2.3 mm and 3.17 mm bore size?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor output shaft diameter with a caliper. If it measures approximately 2.3 mm, select the 2.3 mm variant. If it measures approximately 3.17 mm (1\/8 inch), select the 3.17 mm variant. A loose bore will cause gear slip and premature wear, so always verify before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat module pitch do these gears use, and does it need to match my driven gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — module pitch must match between meshing gears for correct tooth engagement. The module corresponds to the bore variant selected. Check your mating gear's module specification and confirm it matches before purchasing. Mismatched modules will result in poor mesh, noise, and rapid wear.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears strong enough for my RC car or robot application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese plastic spur gears are suited for low-to-medium torque applications typical of hobby RC vehicles, small robotic joints, and light automation. They are not recommended for high-torque or high-impact applications where metal gears would be required. For most hobby-grade motors running at standard voltages, they perform reliably.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill these gears corrode or degrade if exposed to moisture?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEngineering plastic (ABS-type) does not rust and has good resistance to incidental moisture exposure. However, prolonged submersion or exposure to harsh chemicals or UV radiation may cause degradation over time. For outdoor or wet environments, consider applying a light protective coating or selecting a more chemically resistant material.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo these gears require a set screw or collar to secure them to the motor shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears use a press-fit or friction-fit bore and do not include a set screw or hub collar. For applications with significant axial or rotational load, you may wish to use a small drop of thread-locking adhesive or a shaft collar to prevent slippage. For light-duty hobby use, a snug press fit is typically sufficient.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these as a direct replacement for OEM pinion gears in my RC car?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eIn many cases, yes — provided the tooth count (15T), bore diameter, and module pitch match your original pinion gear. Always cross-reference these three specifications against your vehicle's parts list or measure the original gear before ordering. The flat spur profile is compatible with most standard spur-gear motor mounts.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the best quantity to order for a workshop or production run?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor single repairs or prototyping, the 1 or 5 pcs options are ideal. For workshop stock or small production runs, the 50–200 pcs tiers offer better per-unit value. For larger manufacturing or bulk assembly needs, the 300–500 pcs options provide the most cost-efficient pricing. Select your quantity above to see the corresponding price.\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 Size(mm) and quantity 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 between the 2.3 mm and 3.17 mm bore size?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor output shaft diameter with a caliper. If it measures approximately 2.3 mm, select the 2.3 mm variant. If it measures approximately 3.17 mm (1\/8 inch), select the 3.17 mm variant. A loose bore will cause gear slip and premature wear, so always verify before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What module pitch do these gears use, and does it need to match my driven gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — module pitch must match between meshing gears for correct tooth engagement. The module corresponds to the bore variant selected. Check your mating gear's module specification and confirm it matches before purchasing. Mismatched modules will result in poor mesh, noise, and rapid wear.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears strong enough for my RC car or robot application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These plastic spur gears are suited for low-to-medium torque applications typical of hobby RC vehicles, small robotic joints, and light automation. They are not recommended for high-torque or high-impact applications where metal gears would be required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will these gears corrode or degrade if exposed to moisture?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Engineering plastic (ABS-type) does not rust and has good resistance to incidental moisture exposure. However, prolonged submersion or exposure to harsh chemicals or UV radiation may cause degradation over time.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do these gears require a set screw or collar to secure them to the motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears use a press-fit or friction-fit bore and do not include a set screw or hub collar. For applications with significant axial or rotational load, you may wish to use a small drop of thread-locking adhesive or a shaft collar to prevent slippage.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these as a direct replacement for OEM pinion gears in my RC car?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"In many cases, yes — provided the tooth count (15T), bore diameter, and module pitch match your original pinion gear. Always cross-reference these three specifications against your vehicle's parts list or measure the original gear before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the best quantity to order for a workshop or production run?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For single repairs or prototyping, the 1 or 5 pcs options are ideal. For workshop stock or small production runs, the 50–200 pcs tiers offer better per-unit value. For larger manufacturing or bulk assembly needs, the 300–500 pcs options provide the most cost-efficient pricing.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"2.3mm \/ 1pcs","offer_id":52441959563538,"sku":"WZYKKMX1810x1","price":5.78,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 1pcs","offer_id":52441959596306,"sku":"WZYKKMX1812x1","price":5.78,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 5pcs","offer_id":52441959629074,"sku":"WZYKKMX1810x5","price":6.5,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 5pcs","offer_id":52441959661842,"sku":"WZYKKMX1812x5","price":6.5,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 10pcs","offer_id":52441959694610,"sku":"WZYKKMX1810x10","price":5.93,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 10pcs","offer_id":52441959727378,"sku":"WZYKKMX1812x10","price":5.93,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 20pcs","offer_id":52441959760146,"sku":"WZYKKMX1810x20","price":7.43,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 20pcs","offer_id":52441959792914,"sku":"WZYKKMX1812x20","price":7.43,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 50pcs","offer_id":52441959825682,"sku":"WZYKKMX1810x50","price":11.87,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 50pcs","offer_id":52441959858450,"sku":"WZYKKMX1812x50","price":11.87,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 100pcs","offer_id":52441959891218,"sku":"WZYKKMX1810x100","price":19.24,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 100pcs","offer_id":52441959923986,"sku":"WZYKKMX1812x100","price":19.24,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 200pcs","offer_id":52441959956754,"sku":"WZYKKMX1810x200","price":36.53,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 200pcs","offer_id":52441959989522,"sku":"WZYKKMX1812x200","price":36.53,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 300pcs","offer_id":52441960022290,"sku":"WZYKKMX1810x300","price":53.83,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 300pcs","offer_id":52441960055058,"sku":"WZYKKMX1812x300","price":53.83,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 400pcs","offer_id":52441960087826,"sku":"WZYKKMX1810x400","price":71.13,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 400pcs","offer_id":52441960120594,"sku":"WZYKKMX1812x400","price":71.13,"currency_code":"USD","in_stock":true},{"title":"2.3mm \/ 500pcs","offer_id":52441960153362,"sku":"WZYKKMX1810x500","price":88.44,"currency_code":"USD","in_stock":true},{"title":"3.17mm \/ 500pcs","offer_id":52441960186130,"sku":"WZYKKMX1812x500","price":88.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_1_1596c2f5-0f34-41d2-b78e-1f259dd75bc6.jpg?v=1783587702","url":"https:\/\/homediyer.com\/products\/blue-spur-gear-15-tooth-module-2-3mm-3-17mm-pinion-motor-gear","provider":"HomeDIYer","version":"1.0","type":"link"}