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When your drive system demands consistent torque transfer and repeatable mesh accuracy, undersized or mismatched gears become an immediate bottleneck. Engineers, robotics builders, and DIY CNC makers who rely on module 2 gear trains need components that hold tight tolerances across every tooth — these cylindrical spur gears are machined to meet that standard.
Each gear in this series follows Module 2 geometry with a tooth pitch of 6.28 mm (0.247 in). The tooth count range spans 12T through 26T, yielding outer diameters from 28 mm (1.10 in) to 56 mm (2.20 in). Material is typically engineering-grade metal alloy; finish and exact alloy grade vary by variant — see variant options for confirmation.
Typical use cases include motor pinion assemblies in DC gear-motor drives, rack-and-pinion linear actuators for DIY CNC routers, and stage-reduction gearboxes in robotics and automation rigs where a compact 2Mod spur gear pair delivers the required speed ratio.
| Module | 2 (Mod 2) |
|---|---|
| Tooth Count Range | 12T – 26T |
| Tooth Pitch | 6.28 mm (0.247 in) |
| Outer Diameter Range | 28 mm – 56 mm (1.10 in – 2.20 in) |
| Pressure Angle | 20° (standard) |
| Gear Type | Cylindrical Spur Gear |
| Material | See variant options |
| Finish / Colour | See variant options |
| Bore Diameter | See variant options |
| Face Width | See variant options |
| Hub Style | See variant options |
| Quantity per Order | 1 pc (single piece) |
Select the tooth count based on your required gear ratio and available space. Divide the driven gear tooth count by the driving gear tooth count to get the ratio. For a motor pinion, a smaller tooth count (12T–15T) gives higher speed reduction when paired with a larger mating gear, while a higher tooth count (20T–26T) reduces the ratio. Confirm the resulting OD fits within your housing or frame before ordering.
Yes — any gear or rack manufactured to the Module 2 standard with a matching 20° pressure angle will mesh correctly with these gears. Module (not pitch diameter) is the key compatibility parameter. If your existing component is labeled Mod 2 or M2, these gears are a direct match.
Bore diameter varies by tooth count and is not uniform across the 12T–26T range. Please contact us to confirm the bore size for your specific variant before ordering, especially if you need a press fit or keyed shaft connection. We can also advise on reaming or bushing options if your shaft diameter differs.
These cylindrical spur gears are machined from engineering-grade metal alloy and are suitable for continuous-duty motor pinion applications at moderate torque levels typical of DC gear-motors and stepper-driven CNC axes. For high-shock or very high-torque environments, contact us with your RPM and torque figures so we can confirm suitability.
Corrosion resistance depends on the specific material and finish of the variant you select. Some variants may feature a protective coating or be made from a corrosion-resistant alloy. For outdoor or high-humidity installations, please contact us to confirm the finish specification of your chosen variant and whether additional lubrication or sealing is recommended.
Yes, these gears are designed for motor pinion use. Confirm that the bore diameter of your selected variant matches your motor shaft diameter. Common motor shaft sizes range from 3 mm to 8 mm; contact us with your motor shaft spec to verify compatibility before purchase.
For most indoor mechanical and robotics applications, a light machine oil or lithium-based grease applied to the tooth faces is sufficient. For higher-speed motor pinion drives, a gear-specific grease with an EP (extreme pressure) additive helps extend service life. Avoid over-lubrication, which can attract debris and accelerate wear.
