{"product_id":"0-5-1-mod-pinion-gear-10t-150t-spur-gear-with-step-45-steel-transmission-gear","title":"0.5\/1 Mod Pinion Gear 10T-150T Spur Gear with Step 45# Steel Transmission Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e0.5\/1 Mod Pinion Spur Gear — Precision 45# Steel Transmission Gear for Reliable Motion Control\u003c\/h2\u003e\n\u003cp\u003eWhen a stripped plastic gear or an undersized pinion brings your build to a halt, you need a drop-in replacement that holds up under real load. Whether you are a robotics engineer, an RC hobbyist, or a workshop maker, these 45# carbon steel spur gears with stepped bore give you the dimensional accuracy and material strength to keep your drivetrain running without play or wobble.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from 45# medium-carbon steel and is available in two module sizes — 0.5M and 1M — spanning tooth counts from 10T to 150T. Bore diameters range from 4 mm (approx. 0.157 in) to 25 mm (approx. 0.984 in), and the integrated step hub ranges from 0 mm to 60 mm depending on the variant, allowing direct shaft seating without additional spacers.\u003c\/p\u003e\n\u003cp\u003eTypical applications include RC car and truck transmission upgrades requiring a 0.5M 20T or 1M 30T pinion gear replacement, CNC router and 3D-printer Z-axis drives needing a 1M 60T spur gear with step bore, and light industrial conveyor or actuator assemblies where a 1M 100T steel transmission gear with a 14–20 mm bore is specified.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard 0.5 module and 1 module gear systems. Match module (M), tooth count (T), bore diameter, and step height to your shaft and mating gear before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Pinion 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# Carbon Steel Construction\u003c\/strong\u003e — Medium-carbon steel provides a strong balance of hardness and toughness, resisting deformation under sustained torque loads in transmission and drive applications.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eWide Module \u0026amp; Tooth Range\u003c\/strong\u003e — Available in 0.5M and 1M modules with tooth counts from 10T to 150T, covering a broad gear-ratio spectrum for both compact and heavy-duty drive systems.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eStepped Bore Hub Design\u003c\/strong\u003e — The integrated step hub (0–60 mm depending on variant) seats directly onto a shaft shoulder, eliminating axial float and reducing the need for additional collars or spacers.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eMultiple Bore Sizes\u003c\/strong\u003e — Bore options from 4 mm to 25 mm accommodate a wide range of motor and shaft diameters, including common sizes such as 5 mm, 6 mm, 6.35 mm (1\/4 in), 8 mm, 10 mm, 12 mm, 14 mm, and 20 mm.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cstrong\u003eConsistent Tooth Profile Accuracy\u003c\/strong\u003e — Machined to standard module pitch, these gears mesh smoothly with mating spur gears of the same module, minimising backlash and noise in precision motion systems.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eSingle-Unit Listing\u003c\/strong\u003e — Each order contains one gear. Select your exact Types (module + tooth count), Bore diameter, and Step height from the variant options above to get the precise part you need.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Pinion Spur Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e0.5M \/ 1M (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e10T – 150T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 mm – 25 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStep Height\u003c\/th\u003e\n\u003ctd\u003e0 mm – 60 mm (see variant options)\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\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eSpur Gear (straight tooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\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 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\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\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 module and tooth count for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe module (M) must match the module of the mating gear — a 1M pinion will only mesh correctly with a 1M gear. Tooth count determines your gear ratio: divide the driven gear tooth count by the driving gear tooth count. For example, a 1M 20T pinion driving a 1M 60T spur gear gives a 3:1 reduction. Check your existing gear markings or measure the pitch diameter (PD = module × teeth) to confirm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size should I select for my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect the bore diameter that matches your shaft diameter exactly. Common motor shaft sizes are 5 mm, 6 mm, 6.35 mm (1\/4 inch), 8 mm, and 10 mm. If your shaft has a keyway or flat, you will need to machine the bore accordingly after receiving the gear. Do not select a bore larger than your shaft — a loose fit causes vibration and premature wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does the Step dimension refer to?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe Step value is the height of the hub boss that protrudes from the gear face. A 0 mm step means the gear face is flush with no protruding hub. A larger step (e.g., 25 mm or 40 mm) provides a longer shaft engagement surface, useful when you need to position the gear at a specific axial location or when shaft engagement length must exceed the gear face width alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these gears under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are machined from 45# medium-carbon steel, which has a tensile strength of approximately 600–800 MPa depending on heat treatment. They are suitable for moderate-to-high torque applications in robotics, RC drivetrains, and light industrial machinery. For very high-shock or continuous heavy-load environments, consider whether a hardened or alloy steel gear is more appropriate for your specific torque and speed requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears corrosion-resistant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e45# carbon steel has moderate corrosion resistance. For indoor or dry environments, the bare steel finish is generally adequate with light lubrication. For humid, outdoor, or washdown environments, apply a rust-inhibiting grease or consider a gear with a zinc or black-oxide coating. Contact us to confirm available surface treatment options for your chosen variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use a 0.5M gear with a 1M gear in the same drivetrain?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. Gears of different modules cannot mesh together — the tooth pitch and profile are incompatible. All gears in a meshing pair must share the same module. Use 0.5M gears exclusively with other 0.5M gears, and 1M gears with other 1M gears. Mixing modules will result in incorrect tooth engagement, noise, and rapid wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I decide between a 0.5M and a 1M gear for my project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eModule 0.5 gears have smaller, finer teeth suited to compact, lightweight applications such as micro RC cars, small servo mechanisms, and miniature robots. Module 1 gears have larger teeth and can transmit more torque, making them better for larger RC vehicles, 3D printer drives, CNC machines, and light industrial actuators. If replacing an existing gear, measure the pitch diameter and count the teeth to calculate the module: M = PD ÷ T.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Types (module + tooth count), Bore diameter, and Step height above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"0.5M 20T \/ 5mm \/ 0mm","offer_id":52443342242066,"sku":"ZBTCD00507x1","price":3.78,"currency_code":"USD","in_stock":true},{"title":"0.5M 20T \/ 6mm \/ 0mm","offer_id":52443342274834,"sku":"ZBTCD00508x1","price":3.78,"currency_code":"USD","in_stock":true},{"title":"0.5M 20T \/ 6.35mm \/ 0mm","offer_id":52443342307602,"sku":"ZBTCD00509x1","price":3.78,"currency_code":"USD","in_stock":true},{"title":"0.5M 40T \/ 5mm \/ 17mm","offer_id":52443342340370,"sku":"ZBTCD00510x1","price":4.07,"currency_code":"USD","in_stock":true},{"title":"0.5M 40T \/ 6mm \/ 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