{"product_id":"10t-teeth-mod1-steel-pinion-gear-with-screw-4-5mm-bore-straight-tooth-spur-gears","title":"10T Teeth Mod1 Steel Pinion Gear With Screw 4-5mm Bore Straight Tooth Spur Gears","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e10T Mod1 Steel Pinion Spur Gear — Precise Power Transfer for RC, Robotics \u0026amp; CNC Builds\u003c\/h2\u003e\n    \u003cp\u003eWhen a stripped or undersized pinion gear stalls your project, every minute of downtime costs you. Whether you're a robotics engineer dialing in a drive train, an RC hobbyist pushing lap times, or a maker building a custom CNC axis, you need a pinion gear that holds its mesh under load without slipping or wearing prematurely. This 10-tooth Mod1 steel pinion gear is engineered for exactly those demands.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from carbon steel with a straight-tooth (spur) profile and a Module 1 (Mod1) pitch standard. The bore options — 4 mm (~0.157 in) and 5 mm (~0.197 in) — are secured by an included set screw, allowing firm shaft engagement without adhesives. Gear outer diameter is approximately 12 mm (~0.47 in), with a face width typically in the 10–12 mm range depending on variant.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include: RC car and truck motor pinion replacement, small robotic joint actuators requiring a compact 10T drive gear, and DIY CNC or 3D-printer extruder motor coupling where a Mod1 spur gear standard is specified.\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 any Mod1 (Module 1) mating gear or rack. Bore sizes 4 mm and 5 mm suit standard motor shafts in RC, robotics, and light CNC applications. Verify your motor shaft diameter before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 10T Mod1 Steel Pinion 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\u003eSet-Screw Retention\u003c\/strong\u003e\n        \u003cp\u003eIncludes a grub\/set screw for positive shaft locking — no adhesive required, easy to reposition or swap.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n        \u003cstrong\u003eMod1 Straight-Tooth Profile\u003c\/strong\u003e\n        \u003cp\u003eStandard Module 1 pitch ensures accurate mesh with any Mod1 rack, spur, or helical mating gear in your drivetrain.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\n        \u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e\n        \u003cp\u003eMachined from carbon steel for solid load-bearing capacity and resistance to deformation under repeated torque cycles.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eDual Bore Options\u003c\/strong\u003e\n        \u003cp\u003eAvailable in 4 mm and 5 mm bore diameters to match the most common small motor shaft sizes without adapters.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\n        \u003cp\u003eOrder 1, 2, 5, 10, or 20 pieces — stock up for prototyping runs or keep spares on hand for field repairs.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eCompact 10-Tooth Design\u003c\/strong\u003e\n        \u003cp\u003e10-tooth count delivers a high gear ratio when paired with larger driven gears, ideal for torque multiplication in tight spaces.\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 — Mod1 Steel Pinion Spur Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e10T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule (Pitch)\u003c\/th\u003e\n\u003ctd\u003eMod1 (Module 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eStraight-tooth spur\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 mm or 5 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003e~12 mm (~0.47 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFace Width (approx.)\u003c\/th\u003e\n\u003ctd\u003eTypically 10–12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Retention\u003c\/th\u003e\n\u003ctd\u003eSet screw (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 5 \/ 10 \/ 20 PCS (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard Mod1)\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 4 mm and 5 mm bore?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor output shaft diameter with a caliper. If it measures 4 mm, select the 4 mm bore variant; if it measures 5 mm, select the 5 mm bore variant. The included set screw clamps the gear firmly onto the shaft, so an exact bore-to-shaft match is important for concentricity and minimal runout.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does \"Mod1\" mean and will this gear mesh with my existing gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e\"Mod1\" refers to Module 1, a metric gear pitch standard where the tooth size is defined by a 1 mm module. This gear will mesh correctly with any other Mod1 spur gear, rack, or compatible helical gear. It will NOT mesh with Mod0.5, Mod0.8, or imperial diametral-pitch gears — always confirm your mating gear's module before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this gear strong enough for RC car or robot drivetrain use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The carbon steel construction provides solid shear strength for typical RC motor pinion loads and light robotic joint applications. For high-shock or continuous heavy-load industrial use, consider a hardened steel or alloy steel variant. For most hobby RC and robotics builds, this gear handles the torque demands reliably.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes this gear resist rust or corrosion?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCarbon steel has moderate corrosion resistance. For indoor or dry-environment use (RC cars, robotics, CNC), it performs well without additional treatment. If used in humid or outdoor environments, applying a light machine oil or anti-corrosion spray after installation is recommended to extend service life.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this pinion gear with a brushless motor?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, provided your brushless motor shaft is 4 mm or 5 mm in diameter and your drivetrain uses Mod1 gearing. Confirm the motor shaft diameter and the module of your spur\/ring gear before purchasing. The set screw secures the pinion at your desired mesh position.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhy should I buy multiple pieces instead of just one?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePinion gears are wear items — especially in high-RPM RC and robotics applications. Having 2, 5, or 10 spares on hand means you can swap a worn gear in minutes rather than waiting for a reorder. Multi-pack pricing also reduces the per-unit cost significantly compared to buying singles repeatedly.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat tools do I need to install this gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYou'll need a hex key (Allen wrench) sized for the set screw — typically 1.5 mm or 2 mm. Slide the gear onto the motor shaft, position it at the correct mesh depth, then tighten the set screw firmly. No press-fit tools or adhesives are required.\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 Hole Diameter and Qty 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 4 mm and 5 mm bore?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor output shaft diameter with a caliper. If it measures 4 mm, select the 4 mm bore variant; if it measures 5 mm, select the 5 mm bore variant. The included set screw clamps the gear firmly onto the shaft, so an exact bore-to-shaft match is important for concentricity and minimal runout.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does Mod1 mean and will this gear mesh with my existing gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Mod1 refers to Module 1, a metric gear pitch standard where the tooth size is defined by a 1 mm module. This gear will mesh correctly with any other Mod1 spur gear, rack, or compatible helical gear. It will NOT mesh with Mod0.5, Mod0.8, or imperial diametral-pitch gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this gear strong enough for RC car or robot drivetrain use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The carbon steel construction provides solid shear strength for typical RC motor pinion loads and light robotic joint applications. For high-shock or continuous heavy-load industrial use, consider a hardened steel or alloy steel variant.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does this gear resist rust or corrosion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Carbon steel has moderate corrosion resistance. For indoor or dry-environment use it performs well without additional treatment. In humid or outdoor environments, applying a light machine oil or anti-corrosion spray after installation is recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this pinion gear with a brushless motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, provided your brushless motor shaft is 4 mm or 5 mm in diameter and your drivetrain uses Mod1 gearing. Confirm the motor shaft diameter and the module of your spur\/ring gear before purchasing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why should I buy multiple pieces instead of just one?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Pinion gears are wear items. Having 2, 5, or 10 spares on hand means you can swap a worn gear in minutes rather than waiting for a reorder. Multi-pack pricing also reduces the per-unit cost significantly.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What tools do I need to install this gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"You'll need a hex key (Allen wrench) sized for the set screw — typically 1.5 mm or 2 mm. Slide the gear onto the motor shaft, position it at the correct mesh depth, then tighten the set screw firmly.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"10T \/ 4mm \/ 1PCS","offer_id":52442343309586,"sku":"TJJTCD00515x1","price":2.92,"currency_code":"USD","in_stock":true},{"title":"10T \/ 5mm \/ 1PCS","offer_id":52442343342354,"sku":"TJJTCD00516x1","price":2.71,"currency_code":"USD","in_stock":true},{"title":"10T \/ 4mm \/ 2PCS","offer_id":52442343375122,"sku":"TJJTCD00515x2","price":4.2,"currency_code":"USD","in_stock":true},{"title":"10T \/ 5mm \/ 2PCS","offer_id":52442343407890,"sku":"TJJTCD00516x2","price":3.88,"currency_code":"USD","in_stock":true},{"title":"10T \/ 4mm \/ 5PCS","offer_id":52442343440658,"sku":"TJJTCD00515x5","price":8.69,"currency_code":"USD","in_stock":true},{"title":"10T \/ 5mm \/ 5PCS","offer_id":52442343473426,"sku":"TJJTCD00516x5","price":7.87,"currency_code":"USD","in_stock":true},{"title":"10T \/ 4mm \/ 10PCS","offer_id":52442343506194,"sku":"TJJTCD00515x10","price":16.58,"currency_code":"USD","in_stock":true},{"title":"10T \/ 5mm \/ 10PCS","offer_id":52442343538962,"sku":"TJJTCD00516x10","price":14.95,"currency_code":"USD","in_stock":true},{"title":"10T \/ 4mm \/ 20PCS","offer_id":52442343571730,"sku":"TJJTCD00515x20","price":32.35,"currency_code":"USD","in_stock":true},{"title":"10T \/ 5mm \/ 20PCS","offer_id":52442343604498,"sku":"TJJTCD00516x20","price":29.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of7_4acecc05-b06b-4373-a26e-2d54470d3167.jpg?v=1783493418","url":"https:\/\/homediyer.com\/products\/10t-teeth-mod1-steel-pinion-gear-with-screw-4-5mm-bore-straight-tooth-spur-gears","provider":"HomeDIYer","version":"1.0","type":"link"}