{"product_id":"0-5m-58t-spur-gears-steel-pinion-gears-metal-spur-transmission-gear-45-steel","title":"0.5M 58T 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 58T Spur Gears — Precision 45 Steel Pinion Gears for Reliable Transmission\u003c\/h2\u003e\n\u003cp\u003eWhen your motion-control build demands consistent torque transfer and tight mesh tolerances, undersized or poorly machined gears become the weakest link. Makers, robotics builders, and mechanical engineers who need repeatable, low-backlash power transmission rely on spur gears machined to exact module specifications — not approximations.\u003c\/p\u003e\n\u003cp\u003eThese 0.5 module 58-tooth spur gears are machined from 45 steel (medium-carbon steel), offering a balance of hardness and machinability suited to precision drive trains. The bore options range from 6 mm (~0.236 in) to 12 mm (~0.472 in), accommodating a variety of shaft diameters. Each gear features a standard involute tooth profile at Module 0.5, with an outer diameter of approximately 29.5 mm (~1.16 in) based on the formula OD = (T + 2) × M.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY robotics gearboxes requiring compact 0.5M spur gear sets, CNC machine axis drives using 58-tooth steel pinion gears, and small automation mechanisms where metal spur transmission gears replace plastic counterparts for extended service life.\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\u003eModule 0.5\u003c\/strong\u003e gear systems. Select your bore size (6 \/ 8 \/ 10 \/ 12 mm) to match your shaft diameter. Pair with any M0.5 rack, pinion, or mating gear for correct mesh.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 0.5M 58T Steel Spur Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e45 Steel Construction\u003c\/strong\u003e\u003cbr\u003eMachined from medium-carbon 45 steel for a reliable combination of surface hardness and core toughness — suitable for continuous-duty drive applications.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Module 0.5 Involute Profile\u003c\/strong\u003e\u003cbr\u003eFull-depth involute tooth form ensures smooth mesh with any M0.5 mating gear, rack, or pinion without custom modification.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e58-Tooth Count for Defined Gear Ratios\u003c\/strong\u003e\u003cbr\u003e58T enables precise ratio calculations when paired with common pinion tooth counts (e.g., 58:29 = 2:1 reduction), simplifying gearbox design.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔧\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eMultiple Bore Options (6–12 mm)\u003c\/strong\u003e\u003cbr\u003eAvailable with 6 mm, 8 mm, 10 mm, or 12 mm center bores to fit standard motor and shaft diameters without additional machining in most setups.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📦\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible Pack Quantities (1–30 pcs)\u003c\/strong\u003e\u003cbr\u003eOrder from a single gear for prototyping up to 30-piece packs for production runs or spares inventory — all at consistent per-unit quality.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🏭\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eBroad Application Compatibility\u003c\/strong\u003e\u003cbr\u003eSuited for robotics, CNC drives, conveyor mechanisms, and small automation systems where metal spur transmission gears are required over plastic alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 0.5M Spur Gears\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\u003e58T\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\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45 Steel (Medium-Carbon Steel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003eApprox. 29.5 mm (1.16 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (PD)\u003c\/th\u003e\n\u003ctd\u003e29 mm (1.14 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 \/ 12 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\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish \/ Surface Treatment\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 5 \/ 10 \/ 15 \/ 20 \/ 25 \/ 30 pcs (See variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eRobotics, CNC, Automation, DIY Drive Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\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\n\u003csummary\u003eHow do I choose the right bore size for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your motor or drive shaft diameter with calipers. Select the bore option that matches: 6 mm, 8 mm, 10 mm, or 12 mm. If your shaft falls between sizes, the smaller bore can be reamed or bored out by a machinist to an exact fit. Do not select a bore larger than your shaft diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat gear ratio can I achieve with a 58T spur gear?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGear ratio = driven teeth ÷ driving teeth. Pairing this 58T gear as the driven gear with a 29T pinion gives a 2:1 reduction. With a 14T pinion you get approximately 4.14:1. Because the module is 0.5, any M0.5 mating gear will mesh correctly regardless of tooth count.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs 45 steel strong enough for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e45 steel (equivalent to SAE 1045) has a tensile strength of approximately 600–800 MPa in the normalized condition. It is well-suited for moderate-load, continuous-duty drives such as robotics joints, CNC axis drives, and small conveyor systems. For very high-shock or high-speed applications, consider whether a heat-treated or alloy steel variant is more appropriate for your load requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these gears rust or corrode?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e45 steel is a carbon steel and will oxidize if exposed to moisture without protection. For indoor or dry environments, a light machine oil coating is sufficient. For humid or outdoor-adjacent environments, apply a corrosion-inhibiting grease or consider a zinc-plated alternative. The surface finish of each variant is listed in the variant options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these compatible with Module 0.5 racks and other M0.5 gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. All Module 0.5 gears with a 20° pressure angle share the same involute tooth geometry and will mesh correctly with each other, including M0.5 racks, pinions, and idler gears from any manufacturer. Verify the pressure angle (20°) matches your existing gear train before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many gears should I order for a project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor prototyping, a single-piece (1 pc) order lets you verify fit and mesh before committing. For small production runs or builds with multiple identical axes, the 5- or 10-piece packs offer a lower per-unit cost. The 15–30 piece packs are suited for batch builds, classroom kits, or maintaining a spares inventory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears with plastic mating gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, but with a caveat: steel gears will wear plastic mating gears significantly faster than a steel-on-steel pairing. If your existing gear train uses plastic gears, replacing only one gear with steel may accelerate wear on the plastic counterpart. For longevity, pair steel with steel throughout the mesh.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003eTeeth–Bore size and quantity\u003c\/strong\u003e above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"58T-6mm \/ 1","offer_id":52443372650770,"sku":"GLFBMWXGLCDPJ00102x1","price":5.83,"currency_code":"USD","in_stock":true},{"title":"58T-6mm \/ 5","offer_id":52443372683538,"sku":"GLFBMWXGLCDPJ00102x5","price":26.72,"currency_code":"USD","in_stock":true},{"title":"58T-6mm \/ 10","offer_id":52443372716306,"sku":"GLFBMWXGLCDPJ00102x10","price":52.82,"currency_code":"USD","in_stock":true},{"title":"58T-6mm \/ 15","offer_id":52443372749074,"sku":"GLFBMWXGLCDPJ00102x15","price":78.93,"currency_code":"USD","in_stock":true},{"title":"58T-6mm \/ 20","offer_id":52443372781842,"sku":"GLFBMWXGLCDPJ00102x20","price":105.05,"currency_code":"USD","in_stock":true},{"title":"58T-6mm \/ 25","offer_id":52443372814610,"sku":"GLFBMWXGLCDPJ00102x25","price":131.14,"currency_code":"USD","in_stock":true},{"title":"58T-6mm \/ 30","offer_id":52443372847378,"sku":"GLFBMWXGLCDPJ00102x30","price":157.26,"currency_code":"USD","in_stock":true},{"title":"58T-8mm \/ 1","offer_id":52443372880146,"sku":"GLFBMWXGLCDPJ00103x1","price":5.83,"currency_code":"USD","in_stock":true},{"title":"58T-8mm \/ 5","offer_id":52443372912914,"sku":"GLFBMWXGLCDPJ00103x5","price":26.72,"currency_code":"USD","in_stock":true},{"title":"58T-8mm \/ 10","offer_id":52443372945682,"sku":"GLFBMWXGLCDPJ00103x10","price":52.82,"currency_code":"USD","in_stock":true},{"title":"58T-8mm \/ 15","offer_id":52443372978450,"sku":"GLFBMWXGLCDPJ00103x15","price":78.93,"currency_code":"USD","in_stock":true},{"title":"58T-8mm \/ 20","offer_id":52443373011218,"sku":"GLFBMWXGLCDPJ00103x20","price":105.05,"currency_code":"USD","in_stock":true},{"title":"58T-8mm \/ 25","offer_id":52443373043986,"sku":"GLFBMWXGLCDPJ00103x25","price":131.14,"currency_code":"USD","in_stock":true},{"title":"58T-8mm \/ 30","offer_id":52443373076754,"sku":"GLFBMWXGLCDPJ00103x30","price":157.26,"currency_code":"USD","in_stock":true},{"title":"58T-10mm \/ 1","offer_id":52443373109522,"sku":"GLFBMWXGLCDPJ00104x1","price":5.83,"currency_code":"USD","in_stock":true},{"title":"58T-10mm \/ 5","offer_id":52443373142290,"sku":"GLFBMWXGLCDPJ00104x5","price":26.72,"currency_code":"USD","in_stock":true},{"title":"58T-10mm \/ 10","offer_id":52443373175058,"sku":"GLFBMWXGLCDPJ00104x10","price":52.82,"currency_code":"USD","in_stock":true},{"title":"58T-10mm \/ 15","offer_id":52443373207826,"sku":"GLFBMWXGLCDPJ00104x15","price":78.93,"currency_code":"USD","in_stock":true},{"title":"58T-10mm \/ 20","offer_id":52443373240594,"sku":"GLFBMWXGLCDPJ00104x20","price":105.05,"currency_code":"USD","in_stock":true},{"title":"58T-10mm \/ 25","offer_id":52443373273362,"sku":"GLFBMWXGLCDPJ00104x25","price":131.14,"currency_code":"USD","in_stock":true},{"title":"58T-10mm \/ 30","offer_id":52443373306130,"sku":"GLFBMWXGLCDPJ00104x30","price":157.26,"currency_code":"USD","in_stock":true},{"title":"58T-12mm \/ 1","offer_id":52443373338898,"sku":"GLFBMWXGLCDPJ00105x1","price":5.83,"currency_code":"USD","in_stock":true},{"title":"58T-12mm \/ 5","offer_id":52443373371666,"sku":"GLFBMWXGLCDPJ00105x5","price":26.72,"currency_code":"USD","in_stock":true},{"title":"58T-12mm \/ 10","offer_id":52443373404434,"sku":"GLFBMWXGLCDPJ00105x10","price":52.82,"currency_code":"USD","in_stock":true},{"title":"58T-12mm \/ 15","offer_id":52443373437202,"sku":"GLFBMWXGLCDPJ00105x15","price":78.93,"currency_code":"USD","in_stock":true},{"title":"58T-12mm \/ 20","offer_id":52443373469970,"sku":"GLFBMWXGLCDPJ00105x20","price":105.05,"currency_code":"USD","in_stock":true},{"title":"58T-12mm \/ 25","offer_id":52443373502738,"sku":"GLFBMWXGLCDPJ00105x25","price":131.14,"currency_code":"USD","in_stock":true},{"title":"58T-12mm \/ 30","offer_id":52443373535506,"sku":"GLFBMWXGLCDPJ00105x30","price":157.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture_1_of_9_1_6d4dd91e-15ea-4fd6-b165-7e01fb8ea3a6.jpg?v=1784113968","url":"https:\/\/homediyer.com\/products\/0-5m-58t-spur-gears-steel-pinion-gears-metal-spur-transmission-gear-45-steel","provider":"HomeDIYer","version":"1.0","type":"link"}