{"product_id":"0-5m-36t-spur-gears-steel-pinion-gears-metal-spur-transmission-gear-45-steel","title":"0.5M 36T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e0.5M 36T Steel Spur Gears — Reliable Pinion Transmission for DIY Motion Projects\u003c\/h2\u003e\n\u003cp\u003eWhen your robot arm skips a beat or your RC drivetrain loses torque, the culprit is often a worn or undersized gear. Makers, hobbyists, and small-shop engineers who need consistent, repeatable motion control rely on properly spec'd spur gears — and these 0.5 Module 36-tooth steel pinion gears are built to deliver exactly that.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from 45# carbon steel, offering a solid balance of hardness and machinability. The module is 0.5M with 36 teeth, available in 6 mm (0.24 in) or 8 mm (0.31 in) bore diameters. Outer diameter is typically around 19 mm (0.75 in), with a face width in the range of 5–10 mm (0.20–0.39 in) depending on the specific variant.\u003c\/p\u003e\n\u003cp\u003eThese spur gears are well-suited for DIY robotics and servo-driven arms, RC car and truck transmission systems, and compact CNC or 3D-printer extruder drives — anywhere a 0.5M pitch gear train is required for smooth, low-backlash power transfer.\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 (0.5M) gear systems. Pairs with any 0.5M mating gear, rack, or pinion. Bore sizes available: 6 mm and 8 mm. Verify shaft diameter before ordering.\n\u003c\/div\u003e\n\n\u003ch2\u003e✅ Key Features of These 0.5M 36T Steel 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\u003e45# Carbon Steel Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from 45# carbon steel for a reliable combination of surface hardness and core toughness — resists wear under continuous rotational load.\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, 36 Teeth\u003c\/strong\u003e\n\u003cp\u003eStandard 0.5M pitch ensures direct interchangeability with any 0.5M gear system. 36T count delivers a useful reduction or speed ratio in compact drivetrains.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n\u003cstrong\u003eDual Bore Options: 6 mm \u0026amp; 8 mm\u003c\/strong\u003e\n\u003cp\u003eChoose the bore that matches your motor or shaft diameter. Both options maintain the same tooth geometry and module for consistent meshing.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📦\u003c\/div\u003e\n\u003cstrong\u003eFlexible Quantity Packs (1–50 pcs)\u003c\/strong\u003e\n\u003cp\u003eOrder a single gear for prototyping or up to 50 pieces for production runs and bulk builds — quantity pricing scales accordingly.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cstrong\u003eLow-Backlash Spur Profile\u003c\/strong\u003e\n\u003cp\u003eStraight-cut spur tooth profile provides smooth, predictable engagement with minimal backlash — ideal for position-sensitive applications like robotics and CNC.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🛠️\u003c\/div\u003e\n\u003cstrong\u003eMachinable for Custom Keyways\u003c\/strong\u003e\n\u003cp\u003e45# steel is readily machinable, allowing you to add a keyway, set-screw flat, or custom bore modification in a standard workshop lathe or mill.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003ch2\u003e📐 Technical Specifications — 0.5M Spur Gears\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\u003e0.5M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e36T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e6 mm (0.24 in) or 8 mm (0.31 in) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003eTypically ~19 mm (0.75 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFace Width\u003c\/th\u003e\n\u003ctd\u003eTypically 5–10 mm (0.20–0.39 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\u003e45# Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eSpur (straight-cut)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Quantities\u003c\/th\u003e\n\u003ctd\u003e1, 3, 5, 10, 15, 20, 30, 40, 50 pcs\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\u003eWhat does \"0.5M\" mean and how do I know if it matches my existing gear?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e\"0.5M\" refers to the gear module — a standardized measure of tooth size equal to the pitch diameter divided by the number of teeth. Two gears must share the same module to mesh correctly. If your existing gear is labeled 0.5M or has a pitch diameter of approximately 18 mm for 36 teeth, these gears are compatible.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I choose — 6 mm or 8 mm?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft or drive shaft diameter with a caliper. Choose 6 mm if your shaft is 6 mm in diameter, or 8 mm for an 8 mm shaft. If you need a different bore size, the 45# steel construction allows machining to a custom diameter in a lathe.\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# carbon steel offers a tensile strength typically in the range of 600–800 MPa after standard heat treatment. For light-to-medium duty applications such as robotics, RC vehicles, and small CNC machines, these gears provide adequate load capacity. For heavy industrial loads, consider a hardened steel or alloy steel gear.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears corrosion-resistant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# carbon steel has moderate corrosion resistance. For indoor or dry environments, the bare steel finish is generally sufficient. If used in humid or outdoor conditions, apply a light machine oil or consider a zinc-plated or stainless alternative to prevent surface rust.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears with a 0.5M rack for linear motion?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. A 0.5M spur gear meshes directly with a 0.5M gear rack, making this a suitable pinion gear for rack-and-pinion linear motion systems. Ensure the rack's pressure angle also matches (standard 20°) for smooth engagement.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhy buy in bulk — what are the advantages of ordering 10, 20, or 50 pieces?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBulk packs offer a lower per-unit cost, which is useful for production builds, classroom kits, or keeping spares on hand for ongoing projects. The per-piece price decreases significantly as quantity increases — compare the 1-piece and 50-piece options to see the savings.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat applications are these 36T spur gears best suited for?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears are well-matched for DIY robotics (servo and motor gearboxes), RC car and truck drivetrains, 3D printer extruder drives, small CNC axis drives, and educational STEM projects requiring a standard 0.5M gear train. They are not recommended for high-speed turbine or heavy industrial applications.\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 Teeth - Bore(mm) and Qty(pcs) 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\": \"What does '0.5M' mean and how do I know if it matches my existing gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"'0.5M' refers to the gear module — a standardized measure of tooth size equal to the pitch diameter divided by the number of teeth. Two gears must share the same module to mesh correctly. If your existing gear is labeled 0.5M or has a pitch diameter of approximately 18 mm for 36 teeth, these gears are compatible.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which bore size should I choose — 6 mm or 8 mm?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor shaft or drive shaft diameter with a caliper. Choose 6 mm if your shaft is 6 mm in diameter, or 8 mm for an 8 mm shaft. If you need a different bore size, the 45# steel construction allows machining to a custom diameter in a lathe.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong are these gears under load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel offers a tensile strength typically in the range of 600–800 MPa after standard heat treatment. For light-to-medium duty applications such as robotics, RC vehicles, and small CNC machines, these gears provide adequate load capacity.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears corrosion-resistant?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel has moderate corrosion resistance. For indoor or dry environments, the bare steel finish is generally sufficient. If used in humid or outdoor conditions, apply a light machine oil or consider a zinc-plated or stainless alternative.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears with a 0.5M rack for linear motion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. A 0.5M spur gear meshes directly with a 0.5M gear rack, making this a suitable pinion gear for rack-and-pinion linear motion systems. Ensure the rack's pressure angle also matches (standard 20°) for smooth engagement.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why buy in bulk — what are the advantages of ordering 10, 20, or 50 pieces?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bulk packs offer a lower per-unit cost, useful for production builds, classroom kits, or keeping spares on hand. The per-piece price decreases significantly as quantity increases.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What applications are these 36T spur gears best suited for?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears are well-matched for DIY robotics, RC car and truck drivetrains, 3D printer extruder drives, small CNC axis drives, and educational STEM projects requiring a standard 0.5M gear train.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"36T-6mm \/ 1","offer_id":52443366719762,"sku":"GLFBMWXGLCDPJ00062x1","price":4.15,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 3","offer_id":52443366752530,"sku":"GLFBMWXGLCDPJ00062x3","price":10.28,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 5","offer_id":52443366785298,"sku":"GLFBMWXGLCDPJ00062x5","price":16.71,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 10","offer_id":52443366818066,"sku":"GLFBMWXGLCDPJ00062x10","price":32.82,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 15","offer_id":52443366850834,"sku":"GLFBMWXGLCDPJ00062x15","price":48.91,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 20","offer_id":52443366883602,"sku":"GLFBMWXGLCDPJ00062x20","price":65.01,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 30","offer_id":52443366916370,"sku":"GLFBMWXGLCDPJ00062x30","price":97.21,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 40","offer_id":52443366949138,"sku":"GLFBMWXGLCDPJ00062x40","price":129.4,"currency_code":"USD","in_stock":true},{"title":"36T-6mm \/ 50","offer_id":52443366981906,"sku":"GLFBMWXGLCDPJ00062x50","price":161.6,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 1","offer_id":52443367014674,"sku":"GLFBMWXGLCDPJ00063x1","price":4.15,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 3","offer_id":52443367047442,"sku":"GLFBMWXGLCDPJ00063x3","price":10.28,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 5","offer_id":52443367080210,"sku":"GLFBMWXGLCDPJ00063x5","price":16.71,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 10","offer_id":52443367112978,"sku":"GLFBMWXGLCDPJ00063x10","price":32.82,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 15","offer_id":52443367145746,"sku":"GLFBMWXGLCDPJ00063x15","price":48.91,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 20","offer_id":52443367178514,"sku":"GLFBMWXGLCDPJ00063x20","price":65.01,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 30","offer_id":52443367211282,"sku":"GLFBMWXGLCDPJ00063x30","price":97.21,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 40","offer_id":52443367244050,"sku":"GLFBMWXGLCDPJ00063x40","price":129.4,"currency_code":"USD","in_stock":true},{"title":"36T-8mm \/ 50","offer_id":52443367276818,"sku":"GLFBMWXGLCDPJ00063x50","price":161.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of5_1_f8ea4ec3-5686-41a5-bca3-59d83b01177a.jpg?v=1784113230","url":"https:\/\/homediyer.com\/products\/0-5m-36t-spur-gears-steel-pinion-gears-metal-spur-transmission-gear-45-steel","provider":"HomeDIYer","version":"1.0","type":"link"}