{"product_id":"05m-26t-spur-gear-steel-pinion-gear-45-steel","title":"0.5M 26T Spur Gears Steel Pinion Gears Metal Spur Transmission Gear 45 Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e0.5M 26T Steel Spur Gear — Precision Pinion for Compact 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 exactly and holds up under load. These 0.5 module 26-tooth steel spur gears are designed for engineers, robotics builders, and RC hobbyists who require consistent tooth geometry and reliable torque transmission in tight spaces.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from 45 steel — a medium-carbon steel known for its balanced hardness and toughness — and features a module of 0.5M with 26 teeth. Bore options are 4 mm (approximately 0.157 in) and 5 mm (approximately 0.197 in), with an outer diameter typically around 13.5 mm (approximately 0.53 in). The compact form factor suits applications where space is at a premium.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include small-scale robotics joint drives, RC car transmission stages, and precision instrument gear trains. Whether you are prototyping a 0.5M gear reduction stage or restocking a production line with 26T pinion gears, these gears are available in quantities from 1 to 50 pieces per order.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e Compatible with all standard \u003cstrong\u003e0.5 module (0.5M)\u003c\/strong\u003e gear systems. Mates with any 0.5M rack, spur, or helical gear of matching module.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 0.5M 26T Steel Spur Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003e45 Steel Construction\u003c\/strong\u003e\u003cp\u003eMedium-carbon 45 steel delivers a strong balance of hardness and impact resistance, suitable for continuous-duty gear mesh applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003e0.5 Module, 26 Teeth\u003c\/strong\u003e\u003cp\u003eStandard 0.5M tooth profile ensures accurate mesh with any compatible 0.5M gear, rack, or pinion in your drivetrain.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eDual Bore Options\u003c\/strong\u003e\u003cp\u003eAvailable with a 4 mm or 5 mm bore to match common motor shaft diameters used in robotics and RC applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Quantity Packs\u003c\/strong\u003e\u003cp\u003eOrder from 1 to 50 pieces per SKU — ideal for prototyping single units or stocking spare parts for production runs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eConsistent Tooth Geometry\u003c\/strong\u003e\u003cp\u003eMachined to standard involute tooth form for smooth, low-noise gear engagement and predictable transmission ratios.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\u003cstrong\u003eBroad Application Fit\u003c\/strong\u003e\u003cp\u003eSuited for robotics joints, RC car gearboxes, small automation drives, and precision instrument mechanisms requiring compact 0.5M gearing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 0.5M Spur Gear\u003c\/h2\u003e\n\u003ctable\u003e\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\u003e26T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45 Steel (medium-carbon)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 mm \/ 5 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003eTypically ~13.5 mm (~0.53 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\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eStandard involute\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\u003eAvailable Quantities\u003c\/th\u003e\n\u003ctd\u003e1 \/ 3 \/ 5 \/ 10 \/ 15 \/ 20 \/ 30 \/ 50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I choose between the 4 mm and 5 mm bore?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or shaft output diameter with a caliper before ordering. The 4 mm bore fits common micro-motor shafts used in small robotics, while the 5 mm bore suits slightly larger DC motors and RC car pinion applications. If your shaft is between sizes, a 5 mm bore with a set screw or loctite sleeve is typically easier to adapt than boring out a 4 mm gear.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the outer diameter of this 26-tooth 0.5M gear?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a 0.5 module gear, the theoretical outer diameter (OD) is calculated as (Teeth + 2) × Module = (26 + 2) × 0.5 = 14 mm. Actual machined OD may be approximately 13.5–14 mm depending on manufacturing tolerances. Confirm with your caliper after receipt if tight clearances are required.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs 45 steel strong enough for my application?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45 steel is a medium-carbon steel with tensile strength typically in the range of 600–800 MPa, making it well-suited for moderate-load gear applications such as robotics joints, RC drivetrains, and small automation stages. For very high-torque or high-speed applications, consider whether a hardened or alloy steel gear would be more appropriate for your load case.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill this gear corrode if used outdoors or in humid environments?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45 steel is not inherently corrosion-resistant. For outdoor or humid environments, apply a light machine oil or grease to the gear teeth and bore after installation. If long-term corrosion resistance is critical, consider a stainless steel or zinc-plated alternative, or apply a protective coating after installation.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this gear with a 0.5M rack or helical gear?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. This gear follows the standard 0.5 module involute tooth profile with a 20° pressure angle, which is compatible with any 0.5M rack, spur gear, or helical gear of the same module and pressure angle. Always verify the mating gear's module and pressure angle before assembly to ensure proper mesh.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow many pieces should I order for a prototype vs. a production run?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor initial prototyping, a quantity of 1 or 3 pieces is sufficient to validate fit and function. For small production runs or to maintain a spare parts inventory, quantities of 10–30 pieces offer a better per-unit cost. The 50-piece pack is best suited for higher-volume assembly or bulk stocking needs.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the pressure angle of this spur gear?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThis gear uses the standard 20° pressure angle, which is the most common standard for metric module spur gears. This ensures compatibility with the widest range of 0.5M mating gears available on the market.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Teeth - Bore(mm) and Qty(pcs) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How do I choose between the 4 mm and 5 mm bore?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Measure your motor or shaft output diameter with a caliper before ordering. The 4 mm bore fits common micro-motor shafts used in small robotics, while the 5 mm bore suits slightly larger DC motors and RC car pinion applications.\"}},{\"@type\":\"Question\",\"name\":\"What is the outer diameter of this 26-tooth 0.5M gear?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For a 0.5 module gear, the theoretical OD is (26 + 2) × 0.5 = 14 mm. Actual machined OD may be approximately 13.5–14 mm depending on manufacturing tolerances.\"}},{\"@type\":\"Question\",\"name\":\"Is 45 steel strong enough for my application?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"45 steel has tensile strength typically in the range of 600–800 MPa, suitable for moderate-load gear applications such as robotics joints, RC drivetrains, and small automation stages.\"}},{\"@type\":\"Question\",\"name\":\"Will this gear corrode if used outdoors or in humid environments?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"45 steel is not inherently corrosion-resistant. Apply a light machine oil or grease after installation. For long-term corrosion resistance, consider a stainless steel or zinc-plated alternative.\"}},{\"@type\":\"Question\",\"name\":\"Can I use this gear with a 0.5M rack or helical gear?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. This gear follows the standard 0.5 module involute tooth profile with a 20° pressure angle, compatible with any 0.5M rack, spur gear, or helical gear of the same module and pressure angle.\"}},{\"@type\":\"Question\",\"name\":\"How many pieces should I order for a prototype vs. a production run?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For prototyping, 1 or 3 pieces is sufficient. For small production runs, 10–30 pieces offer better per-unit cost. The 50-piece pack suits higher-volume assembly or bulk stocking.\"}},{\"@type\":\"Question\",\"name\":\"What is the pressure angle of this spur gear?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"This gear uses the standard 20° pressure angle, the most common standard for metric module spur gears, ensuring compatibility with the widest range of 0.5M mating gears.\"}}]}\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"26T-4mm \/ 1","offer_id":52442953744658,"sku":"GLFBMWXGLCDPJ00040x1","price":3.96,"currency_code":"USD","in_stock":true},{"title":"26T-4mm \/ 3","offer_id":52442953777426,"sku":"GLFBMWXGLCDPJ00040x3","price":9.74,"currency_code":"USD","in_stock":true},{"title":"26T-4mm \/ 5","offer_id":52442953810194,"sku":"GLFBMWXGLCDPJ00040x5","price":14.69,"currency_code":"USD","in_stock":true},{"title":"26T-4mm \/ 10","offer_id":52442953842962,"sku":"GLFBMWXGLCDPJ00040x10","price":28.63,"currency_code":"USD","in_stock":true},{"title":"26T-4mm \/ 15","offer_id":52442953875730,"sku":"GLFBMWXGLCDPJ00040x15","price":42.55,"currency_code":"USD","in_stock":true},{"title":"26T-4mm \/ 20","offer_id":52442953908498,"sku":"GLFBMWXGLCDPJ00040x20","price":56.48,"currency_code":"USD","in_stock":true},{"title":"26T-4mm \/ 30","offer_id":52442953941266,"sku":"GLFBMWXGLCDPJ00040x30","price":84.33,"currency_code":"USD","in_stock":true},{"title":"26T-4mm \/ 50","offer_id":52442953974034,"sku":"GLFBMWXGLCDPJ00040x50","price":140.04,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 1","offer_id":52442954006802,"sku":"GLFBMWXGLCDPJ00041x1","price":3.96,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 3","offer_id":52442954039570,"sku":"GLFBMWXGLCDPJ00041x3","price":9.74,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 5","offer_id":52442954072338,"sku":"GLFBMWXGLCDPJ00041x5","price":14.69,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 10","offer_id":52442954105106,"sku":"GLFBMWXGLCDPJ00041x10","price":28.63,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 15","offer_id":52442954137874,"sku":"GLFBMWXGLCDPJ00041x15","price":42.55,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 20","offer_id":52442954170642,"sku":"GLFBMWXGLCDPJ00041x20","price":56.48,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 30","offer_id":52442954203410,"sku":"GLFBMWXGLCDPJ00041x30","price":84.33,"currency_code":"USD","in_stock":true},{"title":"26T-5mm \/ 50","offer_id":52442954236178,"sku":"GLFBMWXGLCDPJ00041x50","price":140.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of5_1_5b2bb1f4-8056-4d95-add0-5de4c42aa566.jpg?v=1783944976","url":"https:\/\/homediyer.com\/products\/05m-26t-spur-gear-steel-pinion-gear-45-steel","provider":"HomeDIYer","version":"1.0","type":"link"}