{"product_id":"0-5-mod-brass-spur-gear-36-teeth-bore-4-12mm-motor-gear-transmission-pinion-gear","title":"0.5 Mod Brass Spur Gear 36 Teeth Bore 4~12mm Motor Gear Transmission Pinion Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e0.5 Mod Brass Spur Gear 36T — Precision Pinion Gear for Motor Drive Systems\u003c\/h2\u003e\n    \u003cp\u003eWhen a loose or mismatched pinion gear causes slippage, noise, or premature wear in your drive train, the root cause is almost always a gear that wasn't machined to spec. Hobbyists, robotics engineers, and small-machine builders who demand repeatable, low-backlash motion need a spur gear they can rely on across every build.\u003c\/p\u003e\n    \u003cp\u003eThis 0.5 module brass spur gear features 36 teeth and is available in bore diameters from 4 mm (~0.157 in) to 12 mm (~0.472 in), including the common 6.35 mm (1\/4 in) imperial shaft size. The gear body is machined from solid brass, offering a combination of machinability, corrosion resistance, and moderate load capacity. Outer diameter is approximately 18.5 mm (~0.728 in) based on the standard 0.5 mod formula (OD = (T + 2) × module), and face width is typically 5–8 mm depending on the variant.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include RC car transmission pinion replacement, small DC motor output stages in robotics arms, and compact conveyor or indexing mechanisms where a 0.5 mod 36-tooth spur gear for motor shaft coupling is required. The brass construction also makes it a reliable choice for low-speed, high-torque applications where steel gears would be overkill.\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 Meshes with any 0.5 module (Mod 0.5) spur, rack, or pinion gear. Verify bore diameter matches your motor or shaft before ordering. Available bore sizes: 4 \/ 5 \/ 6 \/ 6.35 \/ 7 \/ 8 \/ 10 \/ 12 mm.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 0.5 Mod Brass Spur Gears\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-features\"\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n      \u003cstrong\u003e36-Tooth 0.5 Module Profile\u003c\/strong\u003e\n      \u003cp\u003eMachined to standard 0.5 mod tooth geometry for accurate meshing with any compatible 0.5 mod gear, rack, or worm in your drivetrain.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🟡\u003c\/div\u003e\n      \u003cstrong\u003eSolid Brass Construction\u003c\/strong\u003e\n      \u003cp\u003eBrass offers natural corrosion resistance, self-lubricating properties under light loads, and easy re-boring or knurling if shaft fit needs adjustment.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n      \u003cstrong\u003e8 Bore Sizes — 4 mm to 12 mm\u003c\/strong\u003e\n      \u003cp\u003eCovers the most common motor shaft diameters including the 6.35 mm (1\/4\") imperial standard, reducing the need for custom adapters or bushings.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e⚡\u003c\/div\u003e\n      \u003cstrong\u003eLow Backlash for Precise Positioning\u003c\/strong\u003e\n      \u003cp\u003eConsistent tooth spacing and bore concentricity keep backlash minimal, which matters in servo-driven or stepper-motor positioning systems.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e📦\u003c\/div\u003e\n      \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\n      \u003cp\u003eAvailable in 1, 2, 5, or 10-piece packs so you can stock spares for production runs or prototype iterations without over-ordering.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n      \u003cstrong\u003eDirect Motor Shaft Pinion Replacement\u003c\/strong\u003e\n      \u003cp\u003eDesigned as a drop-in pinion gear for motor output shafts in RC vehicles, robotics, and small automation equipment using 0.5 mod gear trains.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 0.5 Mod Spur Gear\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e36T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e18 mm (0.709 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003e~18.5 mm (~0.728 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 \/ 5 \/ 6 \/ 6.35 \/ 7 \/ 8 \/ 10 \/ 12 mm (see 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\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20°\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural brass (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eSpur (straight tooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHub Style\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 PCS (see variant options)\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 bore size for my motor shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or drive shaft diameter with a caliper. Match it to the closest bore option: 4, 5, 6, 6.35 (1\/4\"), 7, 8, 10, or 12 mm. If your shaft is slightly undersized, a set screw or loctite can secure the fit. If oversized, the gear cannot be used without re-boring.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat load can a 0.5 mod brass spur gear handle?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass spur gears at 0.5 module are suited for light-to-moderate loads — typically small DC motors, servo outputs, and stepper-driven mechanisms under 5 Nm. For heavy-duty or high-RPM industrial applications, a steel gear of the same module would be more appropriate.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs brass corrosion-resistant enough for outdoor or humid environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass has good natural corrosion resistance and will not rust like steel. It is suitable for moderately humid environments. For saltwater or highly corrosive conditions, consider stainless steel or nylon alternatives. Applying a light machine oil will extend service life in any environment.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this gear mesh with my existing 0.5 mod plastic or steel gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Module is a universal standard — any 0.5 mod gear meshes with any other 0.5 mod gear regardless of material, as long as the pressure angle (20°) matches. Confirm the pressure angle of your existing gear train before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this as a replacement pinion gear for an RC car or robot?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. This 36T 0.5 mod brass spur gear is commonly used as a motor pinion replacement in RC vehicles and robotics platforms. Verify that your existing gear train uses 0.5 module and that the bore matches your motor shaft diameter.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhy buy a multi-pack instead of a single piece?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eGears in high-cycle applications wear over time. Keeping 2–10 spares on hand means zero downtime when a gear needs replacement during a project or production run. Multi-packs also reduce per-unit cost for prototyping or small-batch manufacturing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between pitch diameter and outer diameter for this gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePitch diameter (PD) is the theoretical meshing circle: PD = Teeth × Module = 36 × 0.5 = 18 mm. Outer diameter (OD) adds one full tooth height on each side: OD = (Teeth + 2) × Module ≈ 18.5 mm. Use pitch diameter for center-distance calculations between mating gears.\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 bore size and pack 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 the right bore size for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor or drive shaft diameter with a caliper. Match it to the closest bore option: 4, 5, 6, 6.35 (1\/4\\\"), 7, 8, 10, or 12 mm. If your shaft is slightly undersized, a set screw or loctite can secure the fit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What load can a 0.5 mod brass spur gear handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass spur gears at 0.5 module are suited for light-to-moderate loads — typically small DC motors, servo outputs, and stepper-driven mechanisms under 5 Nm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is brass corrosion-resistant enough for outdoor or humid environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass has good natural corrosion resistance and will not rust like steel. It is suitable for moderately humid environments. Applying a light machine oil will extend service life.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing 0.5 mod plastic or steel gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Any 0.5 mod gear meshes with any other 0.5 mod gear regardless of material, as long as the pressure angle (20°) matches.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this as a replacement pinion gear for an RC car or robot?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. This 36T 0.5 mod brass spur gear is commonly used as a motor pinion replacement in RC vehicles and robotics platforms.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why buy a multi-pack instead of a single piece?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Keeping 2–10 spares on hand means zero downtime when a gear needs replacement. Multi-packs also reduce per-unit cost for prototyping or small-batch manufacturing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between pitch diameter and outer diameter for this gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Pitch diameter = 36 × 0.5 = 18 mm. Outer diameter ≈ (36 + 2) × 0.5 = 19 mm. Use pitch diameter for center-distance calculations between mating gears.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"0.5 Mod 36T 【Bore 4mm】 \/ 1 PCS","offer_id":52442809303314,"sku":"AdaahGFCD04425x1","price":9.22,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 5mm】 \/ 1 PCS","offer_id":52442809336082,"sku":"AdaahGFCD04426x1","price":9.22,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6mm】 \/ 1 PCS","offer_id":52442809368850,"sku":"AdaahGFCD04427x1","price":9.22,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6.35mm】 \/ 1 PCS","offer_id":52442809401618,"sku":"AdaahGFCD04428x1","price":9.22,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 7mm】 \/ 1 PCS","offer_id":52442809434386,"sku":"AdaahGFCD04429x1","price":9.22,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 8mm】 \/ 1 PCS","offer_id":52442809467154,"sku":"AdaahGFCD04430x1","price":9.22,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 10mm】 \/ 1 PCS","offer_id":52442809499922,"sku":"AdaahGFCD04431x1","price":9.55,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 12mm】 \/ 1 PCS","offer_id":52442809532690,"sku":"AdaahGFCD04432x1","price":9.55,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 4mm】 \/ 2 PCS","offer_id":52442809565458,"sku":"AdaahGFCD04425x2","price":14.63,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 5mm】 \/ 2 PCS","offer_id":52442809598226,"sku":"AdaahGFCD04426x2","price":14.63,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6mm】 \/ 2 PCS","offer_id":52442809630994,"sku":"AdaahGFCD04427x2","price":14.63,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6.35mm】 \/ 2 PCS","offer_id":52442809663762,"sku":"AdaahGFCD04428x2","price":14.63,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 7mm】 \/ 2 PCS","offer_id":52442809696530,"sku":"AdaahGFCD04429x2","price":14.63,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 8mm】 \/ 2 PCS","offer_id":52442809729298,"sku":"AdaahGFCD04430x2","price":14.63,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 10mm】 \/ 2 PCS","offer_id":52442809762066,"sku":"AdaahGFCD04431x2","price":15.0,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 12mm】 \/ 2 PCS","offer_id":52442809794834,"sku":"AdaahGFCD04432x2","price":14.82,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 4mm】 \/ 5 PCS","offer_id":52442809827602,"sku":"AdaahGFCD04425x5","price":27.4,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 5mm】 \/ 5 PCS","offer_id":52442809860370,"sku":"AdaahGFCD04426x5","price":27.32,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6mm】 \/ 5 PCS","offer_id":52442809893138,"sku":"AdaahGFCD04427x5","price":27.27,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6.35mm】 \/ 5 PCS","offer_id":52442809925906,"sku":"AdaahGFCD04428x5","price":28.0,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 7mm】 \/ 5 PCS","offer_id":52442809958674,"sku":"AdaahGFCD04429x5","price":27.95,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 8mm】 \/ 5 PCS","offer_id":52442809991442,"sku":"AdaahGFCD04430x5","price":27.81,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 10mm】 \/ 5 PCS","offer_id":52442810024210,"sku":"AdaahGFCD04431x5","price":30.04,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 12mm】 \/ 5 PCS","offer_id":52442810056978,"sku":"AdaahGFCD04432x5","price":29.31,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 4mm】 \/ 10 PCS","offer_id":52442810089746,"sku":"AdaahGFCD04425x10","price":53.71,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 5mm】 \/ 10 PCS","offer_id":52442810122514,"sku":"AdaahGFCD04426x10","price":53.57,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6mm】 \/ 10 PCS","offer_id":52442810155282,"sku":"AdaahGFCD04427x10","price":53.38,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 6.35mm】 \/ 10 PCS","offer_id":52442810188050,"sku":"AdaahGFCD04428x10","price":53.3,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 7mm】 \/ 10 PCS","offer_id":52442810220818,"sku":"AdaahGFCD04429x10","price":53.16,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 8mm】 \/ 10 PCS","offer_id":52442810253586,"sku":"AdaahGFCD04430x10","price":52.89,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 10mm】 \/ 10 PCS","offer_id":52442810286354,"sku":"AdaahGFCD04431x10","price":58.96,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 36T 【Bore 12mm】 \/ 10 PCS","offer_id":52442810319122,"sku":"AdaahGFCD04432x10","price":57.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture3of15_d657edf0-b173-4cd6-aecf-4db56a09733b.jpg?v=1783602865","url":"https:\/\/homediyer.com\/products\/0-5-mod-brass-spur-gear-36-teeth-bore-4-12mm-motor-gear-transmission-pinion-gear","provider":"HomeDIYer","version":"1.0","type":"link"}