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When a slipping or mismatched gear brings your build to a halt, you need a replacement you can trust to mesh cleanly and run quietly. Whether you are a robotics hobbyist, a CNC builder, or a mechanical engineer prototyping a new drive train, these cylindrical spur gears give you the tooth count and module you need without compromise.
Each gear is machined from durable metal alloy stock and features a convex tooth profile with a standard pitch of 3.14 mm (Module 1) or 6.28 mm (Module 2). Outer diameters range from approximately 14 mm (0.55 in) for the 1M-12T up to approximately 324 mm (12.76 in) for the 2M-160T equivalent, with bore dimensions that vary by model — see variant options for exact bore size. The tooth face width is typically 10–15 mm depending on module.
Typical use cases include DC motor gearbox assemblies for tabletop robots, lead-screw drive stages on DIY CNC routers, and reduction stages in custom conveyor or winch mechanisms where a reliable gear-to-gear mesh is critical.
| Type | Cylindrical Spur Gear (Convex Tooth) |
|---|---|
| Available Modules | Module 1 (1M), Module 2 (2M) |
| Tooth Count Range | 12T – 160T (see variant options) |
| Tooth Pitch | 3.14 mm (1M) / 6.28 mm (2M) |
| Pressure Angle | 20° (standard involute) |
| Outer Diameter | See variant options |
| Bore Diameter | See variant options |
| Face Width | Typically 10–15 mm (varies by module) |
| Material | Metal alloy (see variant options) |
| Finish | See variant options |
| Quantity per Order | 1 piece |
Module number defines the tooth size and pitch. Module 1 gears have a tooth pitch of 3.14 mm and are suited to lighter loads and compact drives (e.g., small robots, hobby CNC). Module 2 gears have a tooth pitch of 6.28 mm and handle higher torque loads. Two gears must share the same module to mesh correctly.
Divide the driven gear tooth count by the driving gear tooth count to get your reduction ratio. For example, pairing a 20T driver with a 60T driven gear gives a 3:1 reduction. Choose tooth counts that achieve your target ratio while fitting within your housing dimensions.
Load capacity depends on the module, tooth count, face width, material, and operating speed. Larger modules and higher tooth counts generally support greater torque. For exact load ratings, contact us with your application details so we can confirm suitability.
Corrosion resistance varies by material and finish. If your application involves moisture or chemicals, please contact us to confirm the specific alloy and surface treatment for the variant you are ordering before purchase.
Yes — as long as the other gear shares the same module (1M or 2M) and pressure angle (20°), these gears will mesh correctly. Module and pressure angle must match; tooth count and face width can differ between meshing gears.
Bore diameter varies by model and tooth count. Please refer to the variant detail page or contact us with your specific model number (e.g., 1M-20T) and we will confirm the bore size before you order.
Yes. Module 1 spur gears are commonly used in rack-and-pinion CNC drive stages and extruder gearboxes. Confirm that the bore fits your motor shaft and that the module matches your rack or mating gear before ordering.
