{"product_id":"0-5-mod-brass-pinion-spur-gear-54-teeth-bore-4-5-6-8-10-12mm-transmission-gear","title":"0.5 Mod Brass Pinion Spur Gear 54 Teeth Bore 4\/5\/6\/8\/10\/12mm Transmission Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e0.5 Mod Brass Pinion Spur Gear 54T — Precision Transmission for Compact Drive Systems\u003c\/h2\u003e\n    \u003cp\u003eWhen your RC car, robotic arm, or miniature gearbox demands tight mesh tolerances and reliable torque transfer, a poorly fitted gear becomes the weakest link in the entire drivetrain. Hobbyists, makers, and small-scale mechanical engineers who need a dependable 0.5 module spur gear with a consistent 54-tooth count will find this brass pinion gear engineered to perform where plastic alternatives fail.\u003c\/p\u003e\n    \u003cp\u003eThis 0.5 Mod spur gear is machined from solid brass, offering a balance of machinability, corrosion resistance, and moderate strength suited to light-to-medium load applications. The gear features a module of 0.5 (pitch diameter typically 27 mm \/ ~1.06 in) with 54 teeth, and is available in bore diameters of 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm to accommodate a wide range of shaft sizes. Face width is typically 5–8 mm (~0.20–0.31 in).\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include RC car transmission stages requiring a 0.5 mod pinion spur gear replacement, desktop robotic joint assemblies using brass spur gears for low-noise operation, and DIY CNC or 3D printer extruder drives where a 54-tooth brass gear provides smooth, repeatable motion.\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 Designed for 0.5 module gear systems. Meshes with any 0.5 Mod mating gear (pinion or rack). Bore sizes 4 \/ 5 \/ 6 \/ 8 \/ 10 \/ 12 mm — select to match your shaft diameter. A setscrew or keyway on the shaft is recommended for secure mounting.\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\u003eSolid Brass Construction\u003c\/strong\u003e\n      \u003cp\u003eMachined from brass alloy for corrosion resistance, self-lubricating properties, and quieter mesh compared to steel gears in light-load applications.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n      \u003cstrong\u003e54-Tooth, 0.5 Module Profile\u003c\/strong\u003e\n      \u003cp\u003eStandard 0.5 Mod tooth profile ensures accurate meshing with any compatible 0.5 Mod counterpart gear, rack, or pinion 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\u003e6 Bore Sizes Available\u003c\/strong\u003e\n      \u003cp\u003eChoose from 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, or 12 mm bore to fit your shaft directly — no reaming required when the correct size is selected.\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 PCS, 2 PCS, or 5 PCS packs, making it easy to stock spares or outfit multiple axes in a single order.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n      \u003cstrong\u003eSmooth, Low-Noise Transmission\u003c\/strong\u003e\n      \u003cp\u003eBrass gear teeth deliver reduced operating noise and vibration versus sintered metal alternatives, ideal for precision desktop robotics and RC applications.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🛠️\u003c\/div\u003e\n      \u003cstrong\u003eDrop-In Replacement Geometry\u003c\/strong\u003e\n      \u003cp\u003eStandard 0.5 Mod, 54T geometry makes this a direct drop-in replacement for worn or broken spur gears in RC cars, servo gearboxes, and hobby CNC machines.\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\u003e54T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e27 mm (approx. 1.06 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOutside Diameter\u003c\/th\u003e\n\u003ctd\u003eTypically 28 mm (approx. 1.10 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 \/ 5 \/ 6 \/ 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\u003eTypically 5–8 mm (approx. 0.20–0.31 in)\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 (parallel axis)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 PCS \/ 2 PCS \/ 5 PCS — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Fit\u003c\/th\u003e\n\u003ctd\u003eClearance fit; setscrew or keyway recommended\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 correct bore size for my shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your shaft diameter with a caliper and select the matching bore option (4, 5, 6, 8, 10, or 12 mm). The bore is machined to a standard clearance fit. For a secure, wobble-free connection, use a setscrew, locking collar, or keyed shaft. Avoid selecting a bore larger than your shaft diameter.\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 gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Any gear with a 0.5 module and 20° pressure angle will mesh correctly with this 54T spur gear, regardless of tooth count. Verify that your mating gear is also 0.5 Mod before ordering. Module and pressure angle must match for proper engagement.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong is brass compared to steel for spur gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass is softer than steel, making it well-suited for light-to-medium loads, low-speed drives, and applications where noise reduction matters. For high-torque or high-speed applications, a steel spur gear would be more appropriate. Brass excels in RC cars, servo gearboxes, and desktop robotics where loads are moderate.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes brass resist corrosion and do these gears need lubrication?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass has inherent corrosion resistance and mild self-lubricating properties, making it suitable for indoor and light-outdoor use without surface treatment. For extended service life, a light application of gear grease or white lithium grease on the tooth faces is recommended, especially in continuous-duty applications.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this gear in an RC car transmission or servo gearbox?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The 0.5 Mod, 54T profile is a common specification in RC car pinion\/spur gear sets and servo gearboxes. Confirm the module, tooth count, and bore size match your existing drivetrain before purchasing. This gear is a direct replacement for worn 0.5 Mod 54T spur gears in these applications.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eShould I order 1 PCS, 2 PCS, or 5 PCS?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eOrder 1 PCS if you need a single replacement gear. Choose 2 PCS if you are building a mirrored or dual-axis system, or want one spare on hand. The 5 PCS pack offers the best per-unit value for prototyping multiple configurations, stocking a workshop, or outfitting a fleet of RC vehicles.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the outside diameter of this 54-tooth, 0.5 Mod gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a 0.5 Mod gear with 54 teeth, the pitch diameter is 27 mm and the outside diameter (addendum circle) is typically 28 mm (~1.10 in). Verify clearance in your housing before installation, as actual dimensions may vary slightly by manufacturer tolerance.\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 packing 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 correct bore size for my shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your shaft diameter with a caliper and select the matching bore option (4, 5, 6, 8, 10, or 12 mm). The bore is machined to a standard clearance fit. For a secure, wobble-free connection, use a setscrew, locking collar, or keyed shaft.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing 0.5 Mod gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Any gear with a 0.5 module and 20° pressure angle will mesh correctly with this 54T spur gear. Verify that your mating gear is also 0.5 Mod before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is brass compared to steel for spur gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass is softer than steel, suited for light-to-medium loads and noise-sensitive applications. For high-torque or high-speed use, a steel spur gear is more appropriate.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does brass resist corrosion and do these gears need lubrication?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass has inherent corrosion resistance and mild self-lubricating properties. A light application of gear grease is recommended for extended service life in continuous-duty applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this gear in an RC car transmission or servo gearbox?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The 0.5 Mod, 54T profile is common in RC car and servo gearbox drivetrains. Confirm module, tooth count, and bore size match your existing system before purchasing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Should I order 1 PCS, 2 PCS, or 5 PCS?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Order 1 PCS for a single replacement, 2 PCS for dual-axis builds or a spare, and 5 PCS for the best per-unit value when prototyping or stocking a workshop.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the outside diameter of this 54-tooth, 0.5 Mod gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The pitch diameter is 27 mm and the outside diameter is typically 28 mm (~1.10 in). Verify clearance in your housing before installation.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"0.5 Mod 54T 【Bore 4mm】 \/ 1 PCS","offer_id":52442812449042,"sku":"AdaahGFCD04487x1","price":13.06,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 5mm】 \/ 1 PCS","offer_id":52442812481810,"sku":"AdaahGFCD04488x1","price":13.06,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 6mm】 \/ 1 PCS","offer_id":52442812514578,"sku":"AdaahGFCD04489x1","price":13.06,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 8mm】 \/ 1 PCS","offer_id":52442812547346,"sku":"AdaahGFCD04490x1","price":13.06,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 10mm】 \/ 1 PCS","offer_id":52442812580114,"sku":"AdaahGFCD04491x1","price":13.06,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 12mm】 \/ 1 PCS","offer_id":52442812612882,"sku":"AdaahGFCD04492x1","price":13.06,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 4mm】 \/ 2 PCS","offer_id":52442812645650,"sku":"AdaahGFCD04487x2","price":21.54,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 5mm】 \/ 2 PCS","offer_id":52442812678418,"sku":"AdaahGFCD04488x2","price":21.46,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 6mm】 \/ 2 PCS","offer_id":52442812711186,"sku":"AdaahGFCD04489x2","price":21.46,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 8mm】 \/ 2 PCS","offer_id":52442812743954,"sku":"AdaahGFCD04490x2","price":21.31,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 10mm】 \/ 2 PCS","offer_id":52442812776722,"sku":"AdaahGFCD04491x2","price":21.11,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 12mm】 \/ 2 PCS","offer_id":52442812809490,"sku":"AdaahGFCD04492x2","price":20.88,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 4mm】 \/ 5 PCS","offer_id":52442812842258,"sku":"AdaahGFCD04487x5","price":48.13,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 5mm】 \/ 5 PCS","offer_id":52442812875026,"sku":"AdaahGFCD04488x5","price":47.99,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 6mm】 \/ 5 PCS","offer_id":52442812907794,"sku":"AdaahGFCD04489x5","price":47.86,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 8mm】 \/ 5 PCS","offer_id":52442812940562,"sku":"AdaahGFCD04490x5","price":47.53,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 10mm】 \/ 5 PCS","offer_id":52442812973330,"sku":"AdaahGFCD04491x5","price":47.12,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 54T 【Bore 12mm】 \/ 5 PCS","offer_id":52442813006098,"sku":"AdaahGFCD04492x5","price":46.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of13_227811ad-06da-4d19-b8ab-ef0e08055b14.jpg?v=1783607098","url":"https:\/\/homediyer.com\/products\/0-5-mod-brass-pinion-spur-gear-54-teeth-bore-4-5-6-8-10-12mm-transmission-gear","provider":"HomeDIYer","version":"1.0","type":"link"}