{"product_id":"45-steel-2mod-10t-59t-spur-pinion-gear-motor-gear-thickness-20mm-x-1pcs","title":"45# Steel 2Mod 10T-59T Spur Pinion Gear Motor Gear Thickness 20mm x 1Pcs","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e2 Module Spur Pinion Gear — Precision-Cut 45# Steel for Motors \u0026amp; Drive Systems\u003c\/h2\u003e\n    \u003cp\u003eWhen a stripped or undersized gear brings your build to a halt, you need a replacement that fits right the first time. Whether you're a robotics hobbyist, a CNC builder, or a mechanical engineer prototyping a custom drive train, finding a spur pinion gear with the exact tooth count and module specification can be frustrating. These 45# steel 2-module spur gears are stocked in a wide tooth range — 10T through 59T — so you can match your existing gear set without compromise.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from 45# medium-carbon steel, offering a solid balance of hardness and machinability. The module (Mod) is 2, meaning the pitch diameter equals twice the tooth count in millimeters (e.g., a 20T gear has a 40 mm pitch diameter). Gear thickness is a consistent 20 mm (approximately 0.79 in), and bore diameter varies by tooth count — typically ranging from 5 mm to 12 mm (0.20 in – 0.47 in) across the series. Each listing is for 1 piece.\u003c\/p\u003e\n    \u003cp\u003eThese gears are well-suited for DC motor pinion replacement in robotics and automation rigs, custom gearbox builds for RC vehicles and power transmission projects, and CNC router or 3D printer axis drive systems where a 2-module standard gear is required.\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 Mod 2 (Module 2) gear systems. Meshes with any standard Mod 2 spur or rack gear. Verify bore diameter against your motor shaft before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 2 Module Spur Pinion Gears\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003e45# Medium-Carbon Steel Construction\u003c\/strong\u003e — Machined from 45# steel for reliable hardness and wear resistance in continuous-duty gear mesh applications.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eModule 2 Standard (Mod 2)\u003c\/strong\u003e — Fully compatible with any Mod 2 gear, rack, or pinion in your drivetrain. Pitch diameter = 2 × tooth count (mm).\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003e20 mm Uniform Face Width\u003c\/strong\u003e — Consistent 20 mm (0.79 in) gear thickness across all tooth counts for predictable load distribution and easy alignment.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eWide Tooth Count Selection (10T – 59T)\u003c\/strong\u003e — Choose from 50 tooth count variants in a single product listing to find your exact gear ratio requirement.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Surface Finish\u003c\/strong\u003e — Treated surface helps resist oxidation during storage and light-duty use; suitable for indoor mechanical assemblies.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eSingle-Piece Precision Machining\u003c\/strong\u003e — Each gear is individually cut and finished for consistent tooth profile and smooth meshing with mating Mod 2 components.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — 2 Module Spur Pinion Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\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\u003eModule (Mod)\u003c\/th\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count (T)\u003c\/th\u003e\n\u003ctd\u003e10T – 59T (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eGear Face Thickness\u003c\/th\u003e\n\u003ctd\u003e20 mm (0.79 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e2 × Tooth Count (mm) — e.g., 20T = 40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\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\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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        \u003ctr\u003e\n\u003cth\u003eCompatible Gear Type\u003c\/th\u003e\n\u003ctd\u003eMod 2 Spur \/ Rack\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\u003eYour gear ratio is determined by dividing the driven gear tooth count by the driving (pinion) gear tooth count. For example, if your motor pinion has 20T and your driven gear has 60T, the ratio is 3:1. Select the tooth count that achieves your target ratio when paired with your existing mating gear. If you are replacing a worn gear, match the tooth count exactly.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does \"Module 2\" (Mod 2) mean, and will it fit my gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eModule is the standardized unit of gear tooth size. A Mod 2 gear has a tooth pitch of 2 mm per tooth on the pitch circle. Two gears will mesh correctly only if they share the same module and pressure angle. These gears are Mod 2 with a 20° pressure angle — they will mesh with any other Mod 2, 20° spur gear or rack.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong are these gears under load?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# steel (equivalent to SAE 1045) is a medium-carbon steel with a tensile strength typically in the range of 570–700 MPa in its normalized state. It provides a good balance of toughness and hardness for moderate-load gear applications such as robotics, light automation, and hobby CNC machines. For heavy industrial loads or shock loading, consider heat-treated or alloy steel alternatives.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears corrosion resistant? Can I use them outdoors?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears have a treated surface finish that provides basic oxidation resistance for indoor storage and use. They are not recommended for prolonged outdoor exposure or wet environments without additional protective coating (e.g., grease, paint, or plating). For outdoor or high-humidity applications, consider stainless steel or coated alternatives.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bore diameter does each tooth count have?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBore diameter varies by tooth count across the 10T–59T range, typically from approximately 5 mm for smaller tooth counts up to 12 mm for larger ones. Please check the variant detail or contact us to confirm the exact bore diameter for your selected tooth count before ordering, especially if you need to match a specific motor shaft diameter.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this gear with a helical gear or a bevel gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNo. These are straight-cut spur gears and are designed to mesh only with other spur gears or Mod 2 racks on parallel shafts. They are not compatible with helical gears, bevel gears, or worm gears, which require different tooth geometry and shaft orientations.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs one piece included per order, or is it a pack?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach order includes 1 piece of the selected tooth count variant. If you need multiple gears — for example, a matched pair for a gearbox stage — please adjust the quantity in your cart accordingly.\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 tooth count (Types) 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\": \"Your gear ratio is determined by dividing the driven gear tooth count by the driving (pinion) gear tooth count. Select the tooth count that achieves your target ratio when paired with your existing mating gear. If you are replacing a worn gear, match the tooth count exactly.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does Module 2 (Mod 2) mean, and will it fit my gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Module is the standardized unit of gear tooth size. A Mod 2 gear has a tooth pitch of 2 mm per tooth on the pitch circle. These gears are Mod 2 with a 20° pressure angle and will mesh with any other Mod 2, 20° spur gear or rack.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong are these gears under load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# steel (equivalent to SAE 1045) has a tensile strength typically in the range of 570–700 MPa in its normalized state, providing a good balance of toughness and hardness for moderate-load gear applications such as robotics, light automation, and hobby CNC machines.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears corrosion resistant? Can I use them outdoors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears have a treated surface finish for basic oxidation resistance in indoor use. They are not recommended for prolonged outdoor exposure without additional protective coating such as grease, paint, or plating.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore diameter does each tooth count have?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bore diameter varies by tooth count, typically from approximately 5 mm for smaller tooth counts up to 12 mm for larger ones. Please contact us to confirm the exact bore diameter for your selected tooth count.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this gear with a helical gear or a bevel gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. These are straight-cut spur gears designed to mesh only with other Mod 2 spur gears or racks on parallel shafts. They are not compatible with helical, bevel, or worm gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is one piece included per order, or is it a pack?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each order includes 1 piece of the selected tooth count variant. Adjust the quantity in your cart if you need multiple gears.\"\n      }\n    }\n  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