{"product_id":"05-mod-brass-spur-gear-58-teeth-bore-4-15mm-pinion-gear","title":"0.5 Mod Brass Spur Gear 58 Teeth Bore 4~15mm 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 58T — Compact Pinion Gear for Precision Motor Drive Systems\u003c\/h2\u003e\n\u003cp\u003eFinding a 58-tooth Mod 0.5 pinion gear that fits your motor shaft without custom machining is a recurring challenge for robotics engineers, RC builders, and automation hobbyists. This 0.5 Mod brass spur gear with 58 teeth is stocked in eight bore sizes — from 4 mm to 15 mm — so you can match your motor shaft directly without adapters or rework.\u003c\/p\u003e\n\u003cp\u003eThe gear is machined from brass alloy, delivering smooth involute tooth meshing, moderate corrosion resistance, and low operating noise. Module is 0.5, tooth count is 58T, giving a pitch diameter of 29 mm (approximately 1.14 in). Bore options span 4, 5, 6, 8, 10, 12, 14, and 15 mm (approximately 0.16–0.59 in). Face width is typically 5–8 mm depending on bore variant.\u003c\/p\u003e\n\u003cp\u003eTypical applications include: small DC and stepper motor gearboxes in robotics and automation where a 0.5 mod 58T reduction stage is needed; RC car and truck drivetrain pinion replacement where brass-on-brass or brass-on-plastic meshing reduces noise; and DIY CNC axis drives, camera pan\/tilt rigs, and precision instrument mechanisms where consistent tooth engagement and low backlash are essential.\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 all standard Mod 0.5 external spur gears and Mod 0.5 racks. Confirm your motor shaft diameter matches the selected bore before ordering. Bore range: 4 mm to 15 mm.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 0.5 Mod Brass 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\u003eMod 0.5 \/ 58-Tooth Specification\u003c\/strong\u003e\n\u003cp\u003eStandard 0.5 module, 58-tooth involute profile. Pitch diameter 29 mm (1.14 in) for straightforward gear ratio calculations and direct interchangeability with any Mod 0.5 system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🟡\u003c\/span\u003e\n\u003cstrong\u003eBrass Alloy Construction\u003c\/strong\u003e\n\u003cp\u003eBrass provides smooth, low-noise tooth engagement and adequate corrosion resistance for indoor and light-duty environments — without the maintenance demands of bare steel gears.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n\u003cstrong\u003eEight Bore Sizes: 4–15 mm\u003c\/strong\u003e\n\u003cp\u003eBore options of 4, 5, 6, 8, 10, 12, 14, and 15 mm cover the most common small motor shaft diameters, eliminating the need for custom boring in the majority of applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\n\u003cstrong\u003eLow-Backlash Involute Tooth Form\u003c\/strong\u003e\n\u003cp\u003ePrecision-cut involute teeth minimize backlash and ensure consistent, smooth power transmission across the full rotation cycle — critical for position-sensitive robotics and CNC builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n\u003cstrong\u003e1, 2, or 5-Piece Pack Options\u003c\/strong\u003e\n\u003cp\u003eMulti-piece packs offer a lower per-unit cost — ideal for prototyping multiple axis configurations, building spare parts inventory, or equipping multi-motor drive systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n\u003cstrong\u003eStandard Mod 0.5 Drop-In Replacement\u003c\/strong\u003e\n\u003cp\u003eConforms to DIN\/ISO Mod 0.5 gear geometry, making it a direct drop-in replacement for worn or damaged 58T pinion gears in existing drive trains without system redesign.\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 — 0.5 Mod Brass Spur Gear\u003c\/h2\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\u003e58T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e29 mm (1.14 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\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 \/ 5 \/ 6 \/ 8 \/ 10 \/ 12 \/ 14 \/ 15 mm — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Width (Face 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\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 gear (external)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eInvolute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack 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\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eMotor pinion, transmission, robotics, RC, CNC\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\u003cdetails\u003e\n\u003csummary\u003eHow do I select the right bore size for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft diameter precisely with a caliper and select the matching bore variant. For example, a 6 mm shaft requires the Bore 6 mm option. A bore that is too large will cause shaft slippage under load; a bore that is too small will not fit. If your shaft has a D-cut flat, plan to secure the gear with a set screw or shaft collar after fitting.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat gears will mesh correctly with this 58T Mod 0.5 spur gear?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAny standard Mod 0.5 external spur gear meshes with this gear regardless of tooth count, as long as both share the same module (0.5) and pressure angle (20°). It also meshes with Mod 0.5 racks for linear motion conversion. Do not attempt to mesh with gears of a different module — tooth profiles will not engage correctly.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs brass durable enough for my drive application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass is well-suited for light-to-medium duty applications including robotics, RC vehicles, camera rigs, and small automation systems. It handles the torque loads typical of small DC and stepper motors reliably. For continuous heavy-load or high-RPM industrial duty cycles, a steel or hardened alloy gear may offer longer service life.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow does this 58T gear differ from a 60T gear in the same series?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe 58T gear has a pitch diameter of 29 mm versus 30 mm for the 60T. This gives a slightly different gear ratio when paired with the same driver pinion. For example, a 58T driven gear paired with a 12T driver gives a 4.83:1 reduction, compared to 5:1 for a 60T. Choose 58T when your system requires that specific ratio or when physical space constraints favor the slightly smaller pitch diameter.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow corrosion-resistant is this brass gear?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass offers moderate natural corrosion resistance and performs reliably in dry indoor environments. For applications with occasional light moisture exposure, applying a thin coat of machine oil or grease to the tooth faces provides adequate protection. Avoid prolonged exposure to saltwater or strongly acidic environments without additional protective coating.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I run this gear without lubrication?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass-on-brass or brass-on-plastic meshing can operate dry at low speeds and light loads. For extended service life and reduced tooth wear, applying a light machine grease or PTFE-based lubricant to the tooth faces is recommended — especially under continuous duty or at higher rotational speeds.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich pack quantity should I order?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe 1-piece pack is ideal for single-axis builds or one-off replacements. The 2-piece pack suits dual-motor setups or a primary gear plus one spare. The 5-piece pack offers the lowest per-unit cost and is the practical choice for prototyping multiple configurations, stocking a spare parts kit, or equipping multi-axis systems.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\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 select the right bore size for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor shaft diameter precisely with a caliper and select the matching bore variant. A bore that is too large will cause shaft slippage; a bore that is too small will not fit. If your shaft has a D-cut flat, secure the gear with a set screw or shaft collar after fitting.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What gears will mesh correctly with this 58T Mod 0.5 spur gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Any standard Mod 0.5 external spur gear meshes with this gear as long as both share the same module (0.5) and pressure angle (20°). It also meshes with Mod 0.5 racks for linear motion conversion.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is brass durable enough for my drive application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass is well-suited for light-to-medium duty applications including robotics, RC vehicles, camera rigs, and small automation systems. For continuous heavy-load or high-RPM industrial duty cycles, a steel or hardened alloy gear may offer longer service life.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does this 58T gear differ from a 60T gear in the same series?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The 58T gear has a pitch diameter of 29 mm versus 30 mm for the 60T, giving a slightly different gear ratio. A 58T driven gear paired with a 12T driver gives a 4.83:1 reduction versus 5:1 for a 60T. Choose 58T when your system requires that specific ratio or when space constraints favor the smaller pitch diameter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How corrosion-resistant is this brass gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass offers moderate natural corrosion resistance and performs reliably in dry indoor environments. A thin coat of machine oil or grease on the tooth faces provides adequate protection for light moisture exposure.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I run this gear without lubrication?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Brass-on-brass or brass-on-plastic meshing can operate dry at low speeds and light loads. For extended service life, applying a light machine grease or PTFE-based lubricant to the tooth faces is recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which pack quantity should I order?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The 1-piece pack suits single-axis builds or one-off replacements. The 2-piece pack suits dual-motor setups or a primary gear plus one spare. The 5-piece pack offers the lowest per-unit cost for prototyping, spare parts kits, or multi-axis systems.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"0.5 Mod 58T 【Bore 4mm】 \/ 1 PCS","offer_id":52442813825298,"sku":"AdaahGFCD04501x1","price":14.58,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 5mm】 \/ 1 PCS","offer_id":52442813858066,"sku":"AdaahGFCD04502x1","price":14.48,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 6mm】 \/ 1 PCS","offer_id":52442813890834,"sku":"AdaahGFCD04503x1","price":14.48,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 8mm】 \/ 1 PCS","offer_id":52442813923602,"sku":"AdaahGFCD04504x1","price":14.43,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 10mm】 \/ 1 PCS","offer_id":52442813956370,"sku":"AdaahGFCD04505x1","price":14.33,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 12mm】 \/ 1 PCS","offer_id":52442813989138,"sku":"AdaahGFCD04506x1","price":14.57,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 14mm】 \/ 1 PCS","offer_id":52442814021906,"sku":"AdaahGFCD04507x1","price":14.57,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 15mm】 \/ 1 PCS","offer_id":52442814054674,"sku":"AdaahGFCD04508x1","price":14.57,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 4mm】 \/ 2 PCS","offer_id":52442814087442,"sku":"AdaahGFCD04501x2","price":24.68,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 5mm】 \/ 2 PCS","offer_id":52442814120210,"sku":"AdaahGFCD04502x2","price":24.63,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 6mm】 \/ 2 PCS","offer_id":52442814152978,"sku":"AdaahGFCD04503x2","price":24.55,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 8mm】 \/ 2 PCS","offer_id":52442814185746,"sku":"AdaahGFCD04504x2","price":24.4,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 10mm】 \/ 2 PCS","offer_id":52442814218514,"sku":"AdaahGFCD04505x2","price":24.25,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 12mm】 \/ 2 PCS","offer_id":52442814251282,"sku":"AdaahGFCD04506x2","price":24.04,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 14mm】 \/ 2 PCS","offer_id":52442814284050,"sku":"AdaahGFCD04507x2","price":23.75,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 15mm】 \/ 2 PCS","offer_id":52442814316818,"sku":"AdaahGFCD04508x2","price":23.66,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 4mm】 \/ 5 PCS","offer_id":52442814349586,"sku":"AdaahGFCD04501x5","price":55.34,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 5mm】 \/ 5 PCS","offer_id":52442814382354,"sku":"AdaahGFCD04502x5","price":55.28,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 6mm】 \/ 5 PCS","offer_id":52442814415122,"sku":"AdaahGFCD04503x5","price":55.15,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 8mm】 \/ 5 PCS","offer_id":52442814447890,"sku":"AdaahGFCD04504x5","price":54.79,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 10mm】 \/ 5 PCS","offer_id":52442814480658,"sku":"AdaahGFCD04505x5","price":54.39,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 12mm】 \/ 5 PCS","offer_id":52442814513426,"sku":"AdaahGFCD04506x5","price":53.92,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 14mm】 \/ 5 PCS","offer_id":52442814546194,"sku":"AdaahGFCD04507x5","price":53.3,"currency_code":"USD","in_stock":true},{"title":"0.5 Mod 58T 【Bore 15mm】 \/ 5 PCS","offer_id":52442814578962,"sku":"AdaahGFCD04508x5","price":52.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture3of15_6432aee3-360a-4b7d-982f-8d0d081899ef.jpg?v=1783607132","url":"https:\/\/homediyer.com\/products\/05-mod-brass-spur-gear-58-teeth-bore-4-15mm-pinion-gear","provider":"HomeDIYer","version":"1.0","type":"link"}