Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a stripped or undersized gear brings your motor drive, robotic arm, or CNC axis to a halt, you need a replacement that fits exactly and holds up under load. These Mod 1.5 stainless steel spur gears are engineered for makers, automation builders, and mechanical engineers who cannot afford slop, backlash, or corrosion in their drivetrain.
Each gear is machined from stainless steel and finished to Module 1.5 (1.5 mm/tooth pitch) standards. The tooth count spans 12 to 30 teeth, and bore sizes range from 8 mm (0.31 in) to 20 mm (0.79 in), each paired with a precision-cut keyway (3–6 mm depending on bore) for positive torque transmission. Face width is typically 10–15 mm (0.39–0.59 in); overall gear diameter scales with tooth count per standard module geometry.
Typical use cases include DC motor pinion drives in robotics and automation, lead-screw or rack-and-pinion CNC axis drives, and gear-reduction stages in custom gearboxes where a compact, corrosion-resistant Mod 1.5 spur gear is required.
| Module | 1.5 |
|---|---|
| Tooth Count | 12 / 13 / 14 / 15 / 16 / 18 / 20 / 22 / 24 / 25 / 28 / 30 |
| Bore Diameter | 8 mm / 10 mm / 12 mm / 14 mm / 15 mm / 16 mm / 17 mm / 18 mm / 19 mm / 20 mm |
| Keyway Width | 3 mm (8 mm bore) / 4 mm (10–12 mm bore) / 5 mm (14–17 mm bore) / 6 mm (18–20 mm bore) |
| Material | Stainless Steel |
| Tooth Profile | Standard Involute (20° pressure angle) |
| Pitch (Circular) | ≈ 4.712 mm (Module 1.5 × π) |
| Face Width | See variant options |
| Finish | Machined, natural stainless |
| Gear Type | Spur (Flat / Pinion) |
| Sold As | 1 piece per unit |
Select the tooth count based on your required gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For motor pinion applications, smaller tooth counts (12–16T) give higher reduction; larger counts (24–30T) are used when the pinion is the larger gear in the pair. Confirm the resulting pitch circle diameter fits within your housing clearance.
Measure your motor or shaft diameter precisely with calipers. Choose the bore that matches your shaft (e.g., 10 mm shaft → 10 mm bore with 4 mm keyway). The keyway width is fixed per bore size: 3 mm for 8 mm bore, 4 mm for 10–12 mm bore, 5 mm for 14–17 mm bore, and 6 mm for 18–20 mm bore. Use a matching key stock to lock the gear to the shaft.
Yes. All gears in the Module 1.5 series share the same tooth pitch and pressure angle (20° involute), so they mesh directly with any other Mod 1.5 spur gear, pinion, or rack regardless of tooth count. Ensure center distance is set correctly: center distance = (T1 + T2) × Module / 2.
Stainless steel offers good tensile strength (typically 515–620 MPa for 304-grade) and is well-suited for light-to-medium duty drives, robotics, and automation where corrosion resistance matters. For very high-torque or heavy industrial applications, consider whether a hardened steel or alloy gear would better suit your load requirements.
Stainless steel provides inherent corrosion resistance against moisture, mild chemicals, and humidity without additional coating. It is suitable for outdoor robotics, food-adjacent machinery, and marine-adjacent environments. For highly aggressive chemical exposure, verify the specific stainless alloy grade meets your requirements.
Yes, provided the motor shaft diameter matches the bore size you select and you use the appropriate key stock in the keyway. Confirm the motor shaft has a keyway machined into it, or plan to use a set-screw collar alongside the keyed bore for additional retention. The flat spur gear profile is ideal for compact motor pinion configurations.
Pitch Circle Diameter (PCD) = Module × Tooth Count. For Module 1.5: a 12-tooth gear has PCD = 18 mm, a 20-tooth gear has PCD = 30 mm, and a 30-tooth gear has PCD = 45 mm. The outside diameter (tip circle) = PCD + 2 × Module = PCD + 3 mm.
