{"product_id":"0-5-mod-brass-pinion-spur-gear-24-teeth-bore-4-5-6-6-35-7mm","title":"0.5 Mod Brass Pinion Spur Gear 24 Teeth Bore 4\/5\/6\/6.35\/7mm Transmission Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e0.5 Mod Brass Pinion Spur Gear 24T — Precision Transmission for Compact Drive Systems\u003c\/h2\u003e\n    \u003cp\u003eWhen a stripped or undersized gear stalls your RC car, robotics project, or miniature actuator build, finding a dimensionally accurate replacement with reliable bore fit is the real challenge. This 0.5 module 24-tooth brass pinion spur gear is engineered for makers, hobbyists, and small-scale mechanical engineers who need repeatable, tight-tolerance power transmission in confined spaces.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from solid brass, offering a balance of machinability, moderate corrosion resistance, and low-friction meshing. The module (Mod) is 0.5, with 24 teeth and a pitch diameter of approximately 12 mm (0.47 in). Bore options span 4 mm, 5 mm, 6 mm, 6.35 mm (1\/4 in), and 7 mm to accommodate a wide range of motor and shaft diameters. Face width is typically 5–8 mm (0.20–0.31 in) depending on variant.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include: replacing worn pinion gears in 1\/18–1\/24 scale RC vehicles, driving encoder shafts in desktop CNC and 3D printer extruder assemblies, and building compact gear reduction stages in educational robotics kits and servo-driven mechanisms.\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 or rack gear. Verify bore diameter matches your motor or shaft before ordering. Not compatible with Mod 1.0 or other module standards.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 0.5 Mod Brass Pinion 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\u003eSolid Brass Construction\u003c\/strong\u003e\n      \u003cp\u003eMachined from brass for reliable dimensional stability, smooth meshing, and resistance to galling under moderate loads — a dependable choice for low-to-medium torque drive trains.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n      \u003cstrong\u003e0.5 Module, 24 Teeth\u003c\/strong\u003e\n      \u003cp\u003eStandard Mod 0.5 tooth profile ensures direct interchangeability with any compliant 0.5 module mating gear or rack. Pitch diameter ≈ 12 mm (0.47 in) for compact gear stage design.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n      \u003cstrong\u003eFive Bore Sizes Available\u003c\/strong\u003e\n      \u003cp\u003eChoose from 4 mm, 5 mm, 6 mm, 6.35 mm (1\/4 in imperial), or 7 mm bore to match your motor shaft directly — no bushing or adapter required in most applications.\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. Stock up for prototyping runs, spare-parts inventory, or multi-axis builds without overpaying for single-unit pricing.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n      \u003cstrong\u003eLow-Friction Meshing\u003c\/strong\u003e\n      \u003cp\u003eBrass-on-brass or brass-on-steel gear pairs run quietly with minimal lubrication, making these gears well-suited for noise-sensitive or lightly lubricated environments.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🛠️\u003c\/div\u003e\n      \u003cstrong\u003eEasy to Machine and Modify\u003c\/strong\u003e\n      \u003cp\u003eBrass is readily drilled, reamed, or tapped for set-screw retention, allowing custom shaft-fit modifications without specialized tooling.\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 (Mod)\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\u003e24T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e≈ 12 mm (0.47 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 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFace Width\u003c\/th\u003e\n\u003ctd\u003eTypically 5–8 mm (0.20–0.31 in)\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\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard)\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\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural brass (uncoated)\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        \u003ctr\u003e\n\u003cth\u003eWeight (per piece)\u003c\/th\u003e\n\u003ctd\u003eSee 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. Select the bore that matches exactly — 4 mm, 5 mm, 6 mm, 6.35 mm (common for 1\/4 in imperial shafts), or 7 mm. A bore that is too large will cause slippage; too small cannot be pressed on without reaming. If your shaft is between sizes, choose the next size up and ream or use a set-screw collar.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat module gears will mesh with this 0.5 Mod gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eOnly other Mod 0.5 gears (spur gears, racks, or pinions) will mesh correctly. Module 0.5 is not interchangeable with Mod 1.0, Mod 0.8, or any other module standard. Always confirm the module of your mating gear before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs brass strong enough for my application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass is suitable for low-to-medium torque applications such as RC vehicles, robotics, and light-duty actuators. It offers good machinability and corrosion resistance but is softer than steel. For high-torque or heavy-load applications, consider steel gears instead. Brass pairs well with steel pinions to reduce wear on the more expensive component.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes brass corrode or rust over time?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass does not rust (it contains no iron), but it can oxidize and develop a patina over time when exposed to moisture and air. For most indoor mechanical applications this is cosmetic only and does not affect function. If operating in humid or outdoor environments, a light coat of machine oil or grease will preserve the surface finish.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I add a set screw to secure the gear to the shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Brass is easy to drill and tap. You can add a radial set-screw hole through the hub using a standard tap set. A flat ground on the shaft (D-shaft) combined with a set screw provides the most secure retention. Ensure the hub wall thickness is sufficient for your chosen screw size before drilling.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich pack quantity should I order?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a single repair or prototype, the 1 PCS option is the most economical entry point. If you are building a multi-axis system or want spares on hand, the 5 PCS or 10 PCS packs offer a lower per-unit cost. The 2 PCS pack suits paired-drive configurations where two identical gears are needed simultaneously.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat lubrication is recommended for these brass gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA light machine oil or white lithium grease applied to the tooth faces is sufficient for most applications. Avoid heavy greases that attract dust in open-gear configurations. For RC vehicles, manufacturer-recommended gear lubricants are compatible with brass. Re-lubricate periodically based on run time and operating conditions.\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. Select the bore that matches exactly — 4 mm, 5 mm, 6 mm, 6.35 mm (common for 1\/4 in imperial shafts), or 7 mm. A bore that is too large will cause slippage; too small cannot be pressed on without reaming. If your shaft is between sizes, choose the next size up and ream or use a set-screw collar.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What module gears will mesh with this 0.5 Mod gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Only other Mod 0.5 gears (spur gears, racks, or pinions) will mesh correctly. Module 0.5 is not interchangeable with Mod 1.0, Mod 0.8, or any other module standard. Always confirm the module of your mating gear before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is brass strong enough for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass is suitable for low-to-medium torque applications such as RC vehicles, robotics, and light-duty actuators. It offers good machinability and corrosion resistance but is softer than steel. For high-torque or heavy-load applications, consider steel gears instead.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does brass corrode or rust over time?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass does not rust (it contains no iron), but it can oxidize and develop a patina over time when exposed to moisture and air. A light coat of machine oil or grease will preserve the surface finish in humid environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I add a set screw to secure the gear to the shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Brass is easy to drill and tap. You can add a radial set-screw hole through the hub using a standard tap set. A flat ground on the shaft combined with a set screw provides the most secure retention.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which pack quantity should I order?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For a single repair or prototype, the 1 PCS option is the most economical entry point. The 5 PCS or 10 PCS packs offer a lower per-unit cost for multi-axis builds or spare-parts inventory. The 2 PCS pack suits paired-drive configurations.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What lubrication is recommended for these brass gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A light machine oil or white lithium grease applied to the tooth faces is sufficient for most applications. Avoid heavy greases that attract dust in open-gear configurations. Re-lubricate periodically based on run time and operating conditions.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"0.5 Mod 24T 【Bore 4mm】 \/ 1 PCS","offer_id":52442804125970,"sku":"AdaahGFCD04372x1","price":8.08,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 5mm】 \/ 1 PCS","offer_id":52442804158738,"sku":"AdaahGFCD04373x1","price":8.08,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6mm】 \/ 1 PCS","offer_id":52442804191506,"sku":"AdaahGFCD04374x1","price":8.08,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6.35mm】 \/ 1 PCS","offer_id":52442804224274,"sku":"AdaahGFCD04375x1","price":8.26,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 7mm】 \/ 1 PCS","offer_id":52442804257042,"sku":"AdaahGFCD04376x1","price":8.26,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 4mm】 \/ 2 PCS","offer_id":52442804289810,"sku":"AdaahGFCD04372x2","price":12.43,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 5mm】 \/ 2 PCS","offer_id":52442804322578,"sku":"AdaahGFCD04373x2","price":12.43,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6mm】 \/ 2 PCS","offer_id":52442804355346,"sku":"AdaahGFCD04374x2","price":12.43,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6.35mm】 \/ 2 PCS","offer_id":52442804388114,"sku":"AdaahGFCD04375x2","price":12.91,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 7mm】 \/ 2 PCS","offer_id":52442804420882,"sku":"AdaahGFCD04376x2","price":12.91,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 4mm】 \/ 5 PCS","offer_id":52442804453650,"sku":"AdaahGFCD04372x5","price":22.49,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 5mm】 \/ 5 PCS","offer_id":52442804486418,"sku":"AdaahGFCD04373x5","price":22.49,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6mm】 \/ 5 PCS","offer_id":52442804519186,"sku":"AdaahGFCD04374x5","price":22.49,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6.35mm】 \/ 5 PCS","offer_id":52442804551954,"sku":"AdaahGFCD04375x5","price":24.1,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 7mm】 \/ 5 PCS","offer_id":52442804584722,"sku":"AdaahGFCD04376x5","price":23.96,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 4mm】 \/ 10 PCS","offer_id":52442804617490,"sku":"AdaahGFCD04372x10","price":39.92,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 5mm】 \/ 10 PCS","offer_id":52442804650258,"sku":"AdaahGFCD04373x10","price":39.78,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6mm】 \/ 10 PCS","offer_id":52442804683026,"sku":"AdaahGFCD04374x10","price":39.56,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 6.35mm】 \/ 10 PCS","offer_id":52442804715794,"sku":"AdaahGFCD04375x10","price":43.45,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 24T 【Bore 7mm】 \/ 10 PCS","offer_id":52442804748562,"sku":"AdaahGFCD04376x10","price":43.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture6of12_3a1fe263-5081-4808-b1a9-f77e7b088a51.jpg?v=1783596347","url":"https:\/\/homediyer.com\/products\/0-5-mod-brass-pinion-spur-gear-24-teeth-bore-4-5-6-6-35-7mm","provider":"HomeDIYer","version":"1.0","type":"link"}