{"product_id":"1-mod-pinion-gear-10t-12t-14t-spur-gear-with-screw-45-steel-4-5-6-7mm-bore","title":"1 Mod Pinion Gear 10T 12T 14T Spur Gear With Screw 45# Steel 4\/5\/6\/7mm Bore","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e1 Mod Pinion Spur Gear — Precision 45# Steel Drive Gear for RC, CNC \u0026amp; Robotics\u003c\/h2\u003e\n    \u003cp\u003eWhen a stripped or undersized gear brings your RC car, CNC router, or robotics project to a halt, finding a replacement that matches your exact bore and tooth count is critical. This 1 Mod Pinion Spur Gear is designed for hobbyists, makers, and engineers who need a reliable, drop-in drive gear without custom machining.\u003c\/p\u003e\n    \u003cp\u003eEach 1 mod pinion gear is machined from 45# medium-carbon steel and secured with a set screw for a firm shaft grip. Available in three tooth counts — 10T, 12T, and 14T — with outer diameters of 12mm (~0.47\"), 14mm (~0.55\"), and 16mm (~0.63\") respectively. Bore options span 4mm, 5mm, 6mm, 6.35mm (1\/4\"), and 7mm to accommodate a wide range of motor and shaft sizes.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include 1:10 scale RC car drivetrain upgrades, stepper motor pinion replacement in desktop CNC machines, and gear-reduction stages in DIY robotic arms. The 1 mod tooth profile also makes these gears a direct match for standard 1 mod rack-and-pinion linear motion systems.\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 1 Module (Mod 1) gear systems. Verify your shaft diameter matches the selected bore before ordering. Compatible with standard 1 mod spur gears, racks, and motor pinions.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 1 Mod Pinion Spur Gears\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003e45# Steel Construction\u003c\/strong\u003e — Medium-carbon steel delivers the hardness and wear resistance needed for continuous gear mesh under load, outlasting softer alloy or plastic alternatives.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eMultiple Tooth Counts\u003c\/strong\u003e — Choose 10T, 12T, or 14T to dial in your gear ratio. Smaller tooth counts increase speed; larger counts increase torque.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eWide Bore Selection\u003c\/strong\u003e — Five bore sizes (4 \/ 5 \/ 6 \/ 6.35 \/ 7mm) cover the most common motor shaft diameters, including the 1\/4\" (6.35mm) standard used in many hobby motors.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eIntegrated Set Screw\u003c\/strong\u003e — A pre-tapped set screw hole on each gear allows secure shaft locking without adhesive, enabling quick swaps during tuning or maintenance.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eStandard 1 Mod Tooth Profile\u003c\/strong\u003e — Machined to Module 1 (1 Mod) specification, ensuring full mesh compatibility with any standard Mod 1 mating gear or rack.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cstrong\u003eCompact, Lightweight Form Factor\u003c\/strong\u003e — Outer diameters of 12–16mm keep rotating mass low, reducing inertia in high-speed RC and servo-driven applications.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — 1 Mod Pinion Spur Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1 Mod (Module 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count (T)\u003c\/th\u003e\n\u003ctd\u003e10T \/ 12T \/ 14T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003e12mm (~0.47\") \/ 14mm (~0.55\") \/ 16mm (~0.63\") — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4mm \/ 5mm \/ 6mm \/ 6.35mm \/ 7mm — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45# Medium-Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Locking\u003c\/th\u003e\n\u003ctd\u003eSet Screw (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eStandard Involute, Module 1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003eTypically 20°\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThickness\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural steel (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece\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 tooth count for my application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eTooth count determines your gear ratio. A 10T pinion paired with a larger spur gear gives higher speed and lower torque — ideal for fast RC cars. A 14T pinion produces more torque and lower top speed, better suited for rock crawlers or CNC feed drives. Match your tooth count to the mating gear's tooth count and your desired ratio.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich bore size should I select for my motor shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft diameter with calipers before ordering. Common sizes: 4mm and 5mm are typical for small hobby motors; 6mm and 6.35mm (1\/4\") are standard for mid-size brushless motors; 7mm suits larger brushed motors. The set screw allows a small amount of adjustment, but the bore should match your shaft as closely as possible for concentricity.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs 45# steel strong enough for high-torque applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# steel (equivalent to SAE 1045) has a tensile strength of approximately 600–700 MPa, making it suitable for moderate-to-high torque hobby and light industrial applications. For extreme shock loads or continuous industrial duty, consider heat-treated or alloy steel gears. For RC cars, CNC routers, and robotics, 45# steel is a well-proven choice.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill these gears rust or corrode over time?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# steel is not stainless and will oxidize if exposed to moisture without protection. For indoor CNC or robotics use, a light coat of machine oil is sufficient. For RC applications in wet or muddy conditions, apply a thin layer of grease to the gear mesh and wipe down after use. The natural steel finish can also be treated with a rust-inhibiting spray if long-term outdoor exposure is expected.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears compatible with plastic or nylon mating gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Steel pinions are commonly paired with nylon or acetal (Delrin) spur gears in RC drivetrains to reduce noise and absorb shock. The steel pinion wears more slowly than the plastic gear, which acts as a sacrificial component — a deliberate design choice that protects the motor and drivetrain from damage.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between the 1-10T, 1-12T, and 1-14T model designations?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe model designation refers to the tooth count of the pinion gear: 1-10T has 10 teeth (12mm OD), 1-12T has 12 teeth (14mm OD), and 1-14T has 14 teeth (16mm OD). All three share the same Module 1 tooth profile and are interchangeable within a Mod 1 gear system — only the ratio and physical size differ.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these gears in a rack-and-pinion linear motion system?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, provided your rack is also Module 1. These pinion gears mesh directly with any standard Mod 1 rack. The 10T–14T range is commonly used in compact linear actuators, pen plotters, and small CNC gantry systems where precise, repeatable motion is 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 Models, Outer Diameter, and Bore Diameter 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 tooth count for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Tooth count determines your gear ratio. A 10T pinion paired with a larger spur gear gives higher speed and lower torque — ideal for fast RC cars. A 14T pinion produces more torque and lower top speed, better suited for rock crawlers or CNC feed drives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which bore size should I select for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor shaft diameter with calipers before ordering. Common sizes: 4mm and 5mm for small hobby motors; 6mm and 6.35mm (1\/4\\\") for mid-size brushless motors; 7mm for larger brushed motors.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 45# steel strong enough for high-torque applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# steel has a tensile strength of approximately 600–700 MPa, suitable for moderate-to-high torque hobby and light industrial applications including RC cars, CNC routers, and robotics.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will these gears rust or corrode over time?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# steel is not stainless and will oxidize if exposed to moisture without protection. Apply machine oil for indoor use or grease for wet RC conditions. A rust-inhibiting spray can be used for outdoor exposure.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears compatible with plastic or nylon mating gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Steel pinions are commonly paired with nylon or acetal spur gears in RC drivetrains to reduce noise and absorb shock. The plastic gear acts as a sacrificial component protecting the motor and drivetrain.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the 1-10T, 1-12T, and 1-14T model designations?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The model designation refers to tooth count: 1-10T has 10 teeth (12mm OD), 1-12T has 12 teeth (14mm OD), and 1-14T has 14 teeth (16mm OD). All share the same Module 1 tooth profile.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears in a rack-and-pinion linear motion system?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, provided your rack is also Module 1. These pinion gears mesh directly with any standard Mod 1 rack, commonly used in compact linear actuators, pen plotters, and small CNC gantry systems.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"1-10T \/ 12mm \/ 1pcs \u0026 4mm","offer_id":52442499285266,"sku":"XFHK-KCSJ2676x1","price":2.92,"currency_code":"USD","in_stock":true},{"title":"1-10T \/ 12mm \/ 1pcs \u0026 5mm","offer_id":52442499318034,"sku":"XFHK-KCSJ2677x1","price":2.79,"currency_code":"USD","in_stock":true},{"title":"1-12T \/ 14mm \/ 1pcs \u0026 4mm","offer_id":52442499350802,"sku":"XFHK-KCSJ2678x1","price":2.71,"currency_code":"USD","in_stock":true},{"title":"1-12T \/ 14mm \/ 1pcs \u0026 5mm","offer_id":52442499383570,"sku":"XFHK-KCSJ2679x1","price":2.71,"currency_code":"USD","in_stock":true},{"title":"1-12T \/ 14mm \/ 1pcs \u0026 6mm","offer_id":52442499416338,"sku":"XFHK-KCSJ2680x1","price":2.71,"currency_code":"USD","in_stock":true},{"title":"1-12T \/ 14mm \/ 1pcs \u0026 6.35mm","offer_id":52442499449106,"sku":"XFHK-KCSJ2681x1","price":2.79,"currency_code":"USD","in_stock":true},{"title":"1-12T \/ 14mm \/ 1pcs \u0026 7mm","offer_id":52442499481874,"sku":"XFHK-KCSJ2682x1","price":2.79,"currency_code":"USD","in_stock":true},{"title":"1-14T \/ 16mm \/ 1pcs \u0026 4mm","offer_id":52442499514642,"sku":"XFHK-KCSJ2683x1","price":2.92,"currency_code":"USD","in_stock":true},{"title":"1-14T \/ 16mm \/ 1pcs \u0026 5mm","offer_id":52442499547410,"sku":"XFHK-KCSJ2684x1","price":2.92,"currency_code":"USD","in_stock":true},{"title":"1-14T \/ 16mm \/ 1pcs \u0026 6mm","offer_id":52442499580178,"sku":"XFHK-KCSJ2685x1","price":2.92,"currency_code":"USD","in_stock":true},{"title":"1-14T \/ 16mm \/ 1pcs \u0026 6.35mm","offer_id":52442499612946,"sku":"XFHK-KCSJ2686x1","price":2.92,"currency_code":"USD","in_stock":true},{"title":"1-14T \/ 16mm \/ 1pcs \u0026 7mm","offer_id":52442499645714,"sku":"XFHK-KCSJ2687x1","price":2.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of6_93e9fa7c-2d34-4097-8de5-d9db3b7eb870.jpg?v=1783506755","url":"https:\/\/homediyer.com\/products\/1-mod-pinion-gear-10t-12t-14t-spur-gear-with-screw-45-steel-4-5-6-7mm-bore","provider":"HomeDIYer","version":"1.0","type":"link"}