{"product_id":"1-mod-spur-gear-45-steel-10mm-transmission-gear","title":"1 Mod 8\/12\/13\/14\/15\/16\/17\/18-200T Thickness 10mm Transmission Gear 45# Spur Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 1 Spur Gear in 45# Steel — Precision Transmission for CNC, Robotics \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eWhen a motion-control build demands consistent tooth engagement and reliable torque transfer, undersized or poorly machined gears become the weakest link. Engineers, makers, and automation integrators who need a dependable Module 1 spur gear will find this 45# carbon steel option covers the widest range of tooth counts in a single listing — from compact 8-tooth pinions to large 200-tooth wheels — all sharing a uniform 10 mm (0.39 in) face width for straightforward stage design.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from 45# medium-carbon steel, a material widely used in mechanical power transmission for its balance of strength and machinability. The tooth profile follows the standard Module 1 (1 mm\/tooth pitch) involute geometry. Face width is 10 mm (0.39 in). Bore options range from 2.3 mm to 14 mm depending on the variant selected, accommodating common shaft diameters used in hobby CNC, desktop robotics, and light industrial automation.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY CNC router axis drives requiring a compact spur gear set, tabletop robotic arm joint reduction stages where a module 1 transmission gear keeps the assembly slim, and custom automation fixtures where a 45 steel spur gear with a specific tooth count is needed to achieve a target gear ratio without custom machining.\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 any standard Module 1 (Mod 1) spur or helical gear of the same module. Verify bore diameter matches your shaft before ordering. Suitable for light-to-medium duty open-gear drives; not rated for high-speed enclosed gearboxes without additional lubrication provisions.\n\u003c\/div\u003e\n\n\u003ch2\u003e✅ Key Features of These Module 1 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# medium-carbon steel for a solid balance of tensile strength and wear resistance in open-gear transmission applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cstrong\u003eStandard Module 1 Involute Profile\u003c\/strong\u003e\n\u003cp\u003eFull-depth involute tooth form ensures smooth meshing with any other Mod 1 gear, simplifying gear ratio calculations and stage design.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📏\u003c\/div\u003e\n\u003cstrong\u003eUniform 10 mm Face Width\u003c\/strong\u003e\n\u003cp\u003eConsistent 10 mm (0.39 in) face width across the range makes it easy to align multiple gears in the same plane without shimming.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n\u003cstrong\u003eWide Tooth-Count Selection (8–200T)\u003c\/strong\u003e\n\u003cp\u003eA single product line covers 8 to 200 teeth, letting you source both the pinion and the wheel for a wide range of reduction ratios from one listing.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔧\u003c\/div\u003e\n\u003cstrong\u003eMultiple Bore Sizes Available\u003c\/strong\u003e\n\u003cp\u003eBore options from 2.3 mm to 14 mm accommodate common shaft diameters used in hobby CNC, robotics, and light automation without additional boring.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚡\u003c\/div\u003e\n\u003cstrong\u003eReady-to-Install Transmission Gear\u003c\/strong\u003e\n\u003cp\u003eArrives machined to final dimensions — mount directly onto your shaft with a set screw or key (shaft hardware sold separately) and start transmitting torque immediately.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003ch2\u003e📐 Technical Specifications — Module 1 Spur Gear\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Module\u003c\/th\u003e\n\u003ctd\u003e1 (Mod 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eStandard involute, full-depth\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\u003eFace Width (Thickness)\u003c\/th\u003e\n\u003ctd\u003e10 mm (0.39 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e8 – 200 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e2.3 mm \/ 6 mm \/ 8 mm \/ 10 mm \/ 12 mm \/ 14 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e= Number of Teeth × 1 mm (e.g., 20T → 20 mm PD)\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\u003eFinish\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 PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuitable Load\u003c\/th\u003e\n\u003ctd\u003eLight to medium duty open-gear drives\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 number of teeth for my gear ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eDivide the driven gear tooth count by the driving gear tooth count to get the reduction ratio. For example, pairing a 20-tooth pinion with a 60-tooth wheel gives a 3:1 reduction. Browse the tooth-count options in the variant selector and pick the combination that matches your target ratio. Both gears must be Module 1 to mesh correctly.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size should I select for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eChoose the bore diameter that matches your shaft diameter. Available bores are 2.3 mm, 6 mm, 8 mm, 10 mm, 12 mm, and 14 mm. If your shaft is metric and falls between these sizes, you may need to ream the bore to the exact dimension — a common practice in precision motion-control builds. Check the \"Gear Bore \u0026amp; Amount\" option before adding to cart.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWill this gear mesh with my existing Module 1 gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Any two gears of the same module and pressure angle will mesh correctly regardless of tooth count. These gears use the standard Module 1, 20° pressure angle involute profile, so they are compatible with other Mod 1 spur gears from any manufacturer that follows the same standard.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs 45# steel strong enough for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# carbon steel has a typical tensile strength of approximately 600–800 MPa in the normalized condition, making it suitable for light-to-medium duty open-gear drives such as CNC router axes, robotic joints, and automation fixtures running at moderate speeds and loads. For high-speed enclosed gearboxes or heavy shock loads, consider gears made from alloy steel or with surface hardening treatment.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eDo these gears resist corrosion?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# carbon steel has limited inherent corrosion resistance. For indoor dry environments — typical of CNC machines and desktop robots — the bare steel surface is generally adequate with periodic light oiling. For humid or outdoor environments, apply a rust-inhibiting grease or consider a zinc-plated or stainless alternative for your application.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this gear in a high-speed application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese spur gears are designed for open-gear, light-to-medium duty drives. For high-speed applications (typically above 1,000–1,500 RPM at this module), ensure adequate lubrication, check for dynamic balance on larger tooth-count variants, and verify that the bore-to-shaft fit is within acceptable tolerances to minimize vibration and noise.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I calculate the outer diameter of the gear I need?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a Module 1 gear, the outer diameter (addendum circle) equals the number of teeth plus 2, multiplied by the module: OD = (T + 2) × 1 mm. For example, a 30-tooth gear has an OD of 32 mm. Use this formula to verify the gear fits within your housing or frame before ordering.\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 Gear Module, Number of Teeth, and Bore Size 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 number of teeth for my gear ratio?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Divide the driven gear tooth count by the driving gear tooth count to get the reduction ratio. For example, pairing a 20-tooth pinion with a 60-tooth wheel gives a 3:1 reduction. Both gears must be Module 1 to mesh correctly.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore size should I select for my shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Choose the bore diameter that matches your shaft diameter. Available bores are 2.3 mm, 6 mm, 8 mm, 10 mm, 12 mm, and 14 mm. If your shaft falls between these sizes, you may need to ream the bore to the exact dimension.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing Module 1 gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Any two gears of the same module and pressure angle will mesh correctly. These gears use the standard Module 1, 20° pressure angle involute profile, compatible with other Mod 1 spur gears following the same standard.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is 45# steel strong enough for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel has a typical tensile strength of approximately 600–800 MPa, suitable for light-to-medium duty open-gear drives such as CNC router axes, robotic joints, and automation fixtures at moderate speeds and loads.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do these gears resist corrosion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel has limited inherent corrosion resistance. For indoor dry environments, periodic light oiling is generally adequate. For humid or outdoor environments, apply a rust-inhibiting grease or consider a zinc-plated alternative.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this gear in a high-speed application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For high-speed applications above 1,000–1,500 RPM at this module, ensure adequate lubrication, check for dynamic balance on larger tooth-count variants, and verify bore-to-shaft fit tolerances to minimize vibration.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I calculate the outer diameter of the gear I need?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For Module 1, outer diameter = (Number of Teeth + 2) × 1 mm. For example, a 30-tooth gear has an OD of 32 mm.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"1 Modulus \/ 8 Teeth \/ 2.3mm \u0026 1 PCS","offer_id":52442538934546,"sku":"GYJLTHXCDZH0761x1","price":2.14,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 12 Teeth \/ 6mm \u0026 1 PCS","offer_id":52442538967314,"sku":"GYJLTHXCDZH0762x1","price":1.48,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 13 Teeth \/ 6mm \u0026 1 PCS","offer_id":52442539000082,"sku":"GYJLTHXCDZH0764x1","price":2.35,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 14 Teeth \/ 6mm \u0026 1 PCS","offer_id":52442539032850,"sku":"GYJLTHXCDZH0765x1","price":2.38,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 15 Teeth \/ 6mm \u0026 1 PCS","offer_id":52442539065618,"sku":"GYJLTHXCDZH0767x1","price":2.41,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 15 Teeth \/ 8mm \u0026 1 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