{"product_id":"0-5-mod-spur-gear-46-teeth-bore-6-8-10mm-45-steel-motor-gear","title":"0.5 Mod Spur Gear 46 Teeth Transmission Gear Bore 6\/8\/10mm Motor Gears 45# Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e0.5 Mod 46-Tooth Spur Gear — Precision Steel Drive Gear for DIY Automation\u003c\/h2\u003e\n    \u003cp\u003eWhen your motor drive system demands consistent torque transfer and tight mesh accuracy, a poorly matched gear becomes the weakest link in your build. Makers, robotics hobbyists, and small-workshop engineers who need a reliable 0.5 mod spur gear with a 46-tooth count will find this component ready to drop into compact drive trains without modification.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from 45# carbon steel, offering a solid balance of hardness and machinability. The module is 0.5 (pitch diameter = 23 mm \/ ~0.906 in), with 46 teeth and a bore available in 6 mm, 8 mm, or 10 mm to suit common motor shaft diameters. Face width is typically 5–8 mm depending on bore size.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include compact robotic arm joints requiring a 0.5 mod spur gear for precise angular positioning, DIY CNC axis drives where a 46-tooth steel motor gear maintains repeatable step accuracy, and educational automation rigs that need interchangeable 45# steel transmission gears across multiple build iterations.\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 standard 0.5 module gear systems. Bore options (6 \/ 8 \/ 10 mm) suit most hobby and light-industrial motor shafts. Verify shaft diameter and keyway requirements before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 0.5 Mod 46-Tooth 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# Carbon Steel Construction\u003c\/strong\u003e — Machined from 45# medium-carbon steel for reliable hardness, wear resistance, and long service life in continuous-duty drive applications.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003e0.5 Module, 46 Teeth\u003c\/strong\u003e — Standard 0.5 mod pitch ensures direct mesh compatibility with any other 0.5 mod gear in your drivetrain, simplifying gear ratio calculations.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eThree Bore Options: 6 \/ 8 \/ 10 mm\u003c\/strong\u003e — Select the bore that matches your motor shaft diameter; all three options share the same outer tooth geometry for interchangeable use.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eCompact \u0026amp; Lightweight Profile\u003c\/strong\u003e — With a pitch diameter of ~23 mm, this gear fits into space-constrained enclosures and lightweight robotic frames without adding unnecessary mass.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities (1–10 pcs)\u003c\/strong\u003e — Order exactly what your project needs — single units for prototyping or multi-packs for production runs and spare-parts inventory.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eSmooth, Low-Backlash Tooth Profile\u003c\/strong\u003e — Precision-cut involute teeth deliver smooth engagement and consistent torque transmission, reducing vibration in sensitive positioning systems.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — 0.5 Mod 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\u003e46 T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e23 mm (0.906 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e6 mm \/ 8 mm \/ 10 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFace Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20°\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\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 4 \/ 5 \/ 8 \/ 10 pcs (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWeight (per piece)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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 bore size — 6 mm, 8 mm, or 10 mm?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or drive shaft diameter with a caliper. Select the bore that matches your shaft exactly. If your shaft uses a keyway or set-screw, confirm the hub depth is sufficient for your fastening method. All three bore options share the same 0.5 mod, 46-tooth outer geometry.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the pitch diameter and outer diameter of this gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a 0.5 module, 46-tooth spur gear: Pitch Diameter = Module × Teeth = 0.5 × 46 = 23 mm (≈ 0.906 in). The Outer (Tip) Diameter = (Teeth + 2) × Module = 48 × 0.5 = 24 mm (≈ 0.945 in). Use these values when designing your gear housing or calculating center distance.\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 is a widely used medium-carbon engineering steel with good tensile strength and machinability. It is well-suited for light-to-moderate load drive systems such as robotics, small CNC machines, and educational automation rigs. For heavy-load or high-speed industrial applications, consider whether additional heat treatment or a higher-alloy steel would be required.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this gear resist corrosion in humid or outdoor environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# carbon steel has limited inherent corrosion resistance. For humid or outdoor use, apply a light machine oil or grease to the gear teeth and bore, or consider a protective coating. If long-term corrosion resistance is critical, evaluate stainless steel or coated alternatives for your application.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I mesh this gear with plastic or aluminum 0.5 mod gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — any 0.5 module gear with a 20° pressure angle and involute tooth profile will mesh correctly with this gear, regardless of material. When pairing steel with softer materials (plastic, aluminum), the softer gear will typically wear faster; this is often intentional in designs where the softer gear acts as a sacrificial component.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I calculate the gear ratio when pairing this with another gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eGear ratio = Driven Teeth ÷ Driver Teeth. If this 46-tooth gear is the driven gear and your motor pinion has, for example, 12 teeth, the ratio is 46 ÷ 12 ≈ 3.83:1 — meaning the output shaft turns at roughly 1\/3.83 the motor speed with 3.83× the torque. Adjust your pinion tooth count to achieve your target ratio.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eShould I order a single piece or a multi-pack?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor prototyping or a single-axis build, the 1-piece option is the most economical starting point. If you are building multi-axis systems, need spares for ongoing maintenance, or are running a small production batch, the 2–10 pcs packs offer a lower per-unit cost. Select your quantity in the variant options above.\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 Size (bore diameter) and Packing 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 choose the right bore size — 6 mm, 8 mm, or 10 mm?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor or drive shaft diameter with a caliper. Select the bore that matches your shaft exactly. If your shaft uses a keyway or set-screw, confirm the hub depth is sufficient for your fastening method. All three bore options share the same 0.5 mod, 46-tooth outer geometry.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the pitch diameter and outer diameter of this gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For a 0.5 module, 46-tooth spur gear: Pitch Diameter = 0.5 × 46 = 23 mm (≈ 0.906 in). Outer (Tip) Diameter = (46 + 2) × 0.5 = 24 mm (≈ 0.945 in).\"\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 is a medium-carbon engineering steel with good tensile strength and machinability, well-suited for light-to-moderate load drive systems such as robotics, small CNC machines, and educational automation rigs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear resist corrosion in humid or outdoor environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel has limited inherent corrosion resistance. Apply a light machine oil or grease for humid or outdoor use, or consider a protective coating for long-term corrosion resistance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I mesh this gear with plastic or aluminum 0.5 mod gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — any 0.5 module gear with a 20° pressure angle and involute tooth profile will mesh correctly with this gear, regardless of material.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I calculate the gear ratio when pairing this with another gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Gear ratio = Driven Teeth ÷ Driver Teeth. For example, pairing this 46-tooth gear with a 12-tooth pinion gives a ratio of 46 ÷ 12 ≈ 3.83:1.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Should I order a single piece or a multi-pack?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For prototyping, the 1-piece option is the most economical. For multi-axis systems, maintenance spares, or small production batches, the 2–10 pcs packs offer a lower per-unit cost.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"0.5M 46T, Bore 6mm \/ 1 pcs","offer_id":52443139899666,"sku":"GLFBFHHGLCDPJ00083x1","price":13.3,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 8mm \/ 1 pcs","offer_id":52443139932434,"sku":"GLFBFHHGLCDPJ00084x1","price":13.3,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 10mm \/ 1 pcs","offer_id":52443139965202,"sku":"GLFBFHHGLCDPJ00085x1","price":13.3,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 6mm \/ 2 pcs","offer_id":52443139997970,"sku":"GLFBFHHGLCDPJ00083x2","price":23.95,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 8mm \/ 2 pcs","offer_id":52443140030738,"sku":"GLFBFHHGLCDPJ00084x2","price":23.95,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 10mm \/ 2 pcs","offer_id":52443140063506,"sku":"GLFBFHHGLCDPJ00085x2","price":23.95,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 6mm \/ 3 pcs","offer_id":52443140096274,"sku":"GLFBFHHGLCDPJ00083x3","price":34.87,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 8mm \/ 3 pcs","offer_id":52443140129042,"sku":"GLFBFHHGLCDPJ00084x3","price":34.87,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 10mm \/ 3 pcs","offer_id":52443140161810,"sku":"GLFBFHHGLCDPJ00085x3","price":34.87,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 6mm \/ 4 pcs","offer_id":52443140194578,"sku":"GLFBFHHGLCDPJ00083x4","price":45.79,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 8mm \/ 4 pcs","offer_id":52443140227346,"sku":"GLFBFHHGLCDPJ00084x4","price":45.79,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 10mm \/ 4 pcs","offer_id":52443140260114,"sku":"GLFBFHHGLCDPJ00085x4","price":45.79,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 6mm \/ 5 pcs","offer_id":52443140292882,"sku":"GLFBFHHGLCDPJ00083x5","price":56.71,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 8mm \/ 5 pcs","offer_id":52443140325650,"sku":"GLFBFHHGLCDPJ00084x5","price":56.71,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 10mm \/ 5 pcs","offer_id":52443140358418,"sku":"GLFBFHHGLCDPJ00085x5","price":56.71,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 6mm \/ 8 pcs","offer_id":52443140391186,"sku":"GLFBFHHGLCDPJ00083x8","price":89.46,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 8mm \/ 8 pcs","offer_id":52443140423954,"sku":"GLFBFHHGLCDPJ00084x8","price":89.46,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 10mm \/ 8 pcs","offer_id":52443140456722,"sku":"GLFBFHHGLCDPJ00085x8","price":89.46,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 6mm \/ 10 pcs","offer_id":52443140489490,"sku":"GLFBFHHGLCDPJ00083x10","price":111.3,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 8mm \/ 10 pcs","offer_id":52443140522258,"sku":"GLFBFHHGLCDPJ00084x10","price":111.3,"currency_code":"USD","in_stock":true},{"title":"0.5M 46T, Bore 10mm \/ 10 pcs","offer_id":52443140555026,"sku":"GLFBFHHGLCDPJ00085x10","price":111.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-02_5d176cd6-17fa-4d32-af54-35b12f0597d8.jpg?v=1784021617","url":"https:\/\/homediyer.com\/products\/0-5-mod-spur-gear-46-teeth-bore-6-8-10mm-45-steel-motor-gear","provider":"HomeDIYer","version":"1.0","type":"link"}