2M/2.5M/3M/4M/5M 10-96T Spur Gear Transmission Motor Gears (Harden by Quenching)

The module determines the size of each tooth and must match between mating gears. Larger modules (e.g., 4M, 5M) handle higher torque but produce larger, heavier gears. Tooth count sets your gear ratio: divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For example, a 10T driver meshing with a 40T driven gear gives a 4:1 reduction. Start with the torque and speed requirements of your motor, then select the smallest module that keeps tooth stress within safe limits.

No. Gears of different modules cannot mesh correctly. The tooth pitch, height, and thickness are all scaled to the module value, so a 2M gear and a 2.5M gear will not engage properly and will damage each other if forced together. Always confirm that both the driving and driven gears share the same module before ordering.

These gears are made from steel and hardened by quenching, which significantly increases surface hardness compared to unhardened or cast gears. Quench hardening improves resistance to tooth surface fatigue (pitting) and wear under cyclic loading. Exact load ratings depend on the specific module, tooth count, face width, and operating speed of your application. For critical load calculations, use standard AGMA or ISO gear rating methods with the gear's geometry data.

These are steel gears without a stated corrosion-resistant coating. For outdoor, humid, or wet environments, we recommend applying a suitable gear lubricant or grease to the tooth surfaces and bore, and considering periodic reapplication. If long-term corrosion resistance is a primary requirement, contact us to confirm whether a coated or stainless option is available for your module and tooth count.

Bore diameter and keyway dimensions vary by module and tooth count. These details are specific to each variant and are not uniform across the range. Please check the variant options on this page or contact us with your selected model number (e.g., "3M 20T") and we will confirm the bore and keyway specifications before you order.

First, identify your motor shaft diameter and whether it uses a keyway or set-screw retention. Then select the module that matches your mating gear (or calculate the required module from your center distance and tooth counts). Finally, choose the tooth count that gives your target gear ratio. If you are unsure, measure your existing gear's tooth pitch with calipers: module = pitch diameter ÷ tooth count.

Yes, like all steel spur gears, these benefit from lubrication to reduce friction, heat, and tooth wear. For low-speed, light-load applications, a light machine oil or grease applied to the tooth faces is sufficient. For higher-speed or higher-load drives, use a gear-rated grease or oil appropriate for your operating temperature range. Regular lubrication intervals will extend gear life significantly.