Module 1M, 1.5M, 2M Spur Gear Wheels Spur Wheel With 10 To 90 Teeth Flat Gear

The module (M) is the fundamental unit of gear tooth size in the metric system. A larger module means larger, stronger teeth. Match the module of your new gear to the module of the mating gear, rack, or pinion already in your system. If you are designing from scratch, 1M suits light-load, compact mechanisms; 1.5M works well for moderate-load drives; and 2M is appropriate for higher-torque applications where tooth strength matters more than compactness.

Gear ratio equals the tooth count of the driven gear divided by the tooth count of the driving gear. For example, pairing a 20-tooth pinion with a 60-tooth gear gives a 3:1 reduction ratio. Choose your tooth counts based on the speed reduction or increase your application requires. A wider tooth count range — like the 10 to 150 teeth available here — lets you achieve ratios from roughly 1:1 up to 15:1 within a single product family.

Bore diameter varies by module and tooth count. Please check the specific variant detail page or contact us to confirm the bore size before ordering. If your shaft diameter does not match the standard bore, the gear can typically be re-bored by a local machine shop to your required dimension, provided the bore does not exceed the hub diameter.

45# steel has a tensile strength typically in the range of 600–750 MPa after standard heat treatment, making it suitable for moderate mechanical loads in DIY automation, light conveyor drives, and robotics. For heavy industrial applications with continuous high-torque cycling, consider gears made from alloy steel or with surface hardening. If you are unsure whether this material suits your load requirements, contact us with your torque and speed specifications.

45# steel in its natural machined finish has limited corrosion resistance and will oxidize if exposed to moisture over time. For indoor, dry-environment applications this is generally not a concern. If your application involves humidity, occasional water exposure, or outdoor use, we recommend applying a light machine oil or grease to the gear teeth and bore, or consider sourcing stainless steel or zinc-plated alternatives for corrosion-critical environments.

Yes. These gears follow the standard metric module tooth profile with a 20° pressure angle, which is the most common standard for metric gear racks and pinions. A 1M spur gear will mesh correctly with a 1M gear rack; a 2M gear meshes with a 2M rack. Always verify that both the module and pressure angle match between mating components to ensure proper tooth engagement and avoid premature wear.

Yes, spur gears transmit force along parallel shafts and generate no inherent axial thrust, making them suitable for vertical shaft arrangements. Ensure your shaft bearings are rated for the radial load generated by the gear mesh force. For vertical drives carrying significant weight, apply appropriate lubrication to the gear teeth to reduce wear and heat buildup during operation.