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When your motion-control build demands consistent tooth engagement and repeatable torque transfer, undersized or poorly machined gears become the weakest link in the chain. Engineers, makers, and automation integrators working on CNC routers, robotic arms, conveyor drives, and stepper-motor stages need a Module 1.5 spur gear that holds tight tolerances across every tooth count — without adding unnecessary weight to the assembly.
These aluminium spur gears are machined from 6061-series aluminium alloy and feature an integrated hub for secure shaft clamping. The Module 1.5 tooth profile spans 12 to 32 teeth, with pitch circle diameters ranging from approximately 18 mm (0.71 in) for the 12T up to 48 mm (1.89 in) for the 32T. Bore options cover 6 mm, 8 mm, 10 mm, 12 mm, and keyway variants up to 20 mm + 6 mm keyway, accommodating a wide range of motor and shaft standards.
Typical use cases include direct-drive pinion gears on rack-and-pinion linear axes for CNC plasma and router tables, gear-reduction stages in small robotic joint actuators, and motor-output pinions in 3D-printer extruder or Z-axis assemblies — all applications where a lightweight aluminium mod 1.5 pinion gear with hub reduces rotational inertia while maintaining structural rigidity.
The extended hub provides a larger clamping surface for set screws, reducing shaft slip under dynamic loads compared to hubless pinions.
Machined from 6061-series aluminium, these gears keep rotational inertia low — critical for high-cycle stepper and servo motor applications.
Sixteen tooth-count options from 12 to 32 teeth let you dial in the exact gear ratio needed for your drive stage without custom machining.
Plain bores from 6–12 mm plus keyway variants (12 mm + 4 mm key up to 20 mm + 6 mm key) cover standard metric motor shafts and keyed shaft assemblies.
The natural aluminium surface resists oxidation in typical indoor workshop and light-industrial environments, keeping the gear serviceable over extended duty cycles.
Fully interchangeable with any ISO/DIN Module 1.5 rack or mating gear, making these pinions a drop-in fit for standard motion-control hardware.
| Module | 1.5 |
|---|---|
| Tooth Count Options | 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 28, 30, 32 Tooth |
| Bore Size Options | 6 mm, 8 mm, 10 mm, 12 mm, 12 mm + 4 mm Keyway, 14 mm + 5 mm Keyway, 15 mm + 5 mm Keyway, 16 mm + 5 mm Keyway, 17 mm + 5 mm Keyway, 18 mm + 6 mm Keyway, 20 mm + 6 mm Keyway |
| Pitch Circle Diameter | Module × Teeth (e.g., 1.5 × 20 = 30 mm PCD) |
| Material | Aluminium Alloy (6061-series) |
| Hub | Integrated hub with set-screw clamping |
| Tooth Profile | Standard Module 1.5 (ISO/DIN) |
| Pressure Angle | 20° |
| Finish | Natural aluminium (uncoated) |
| Weight | See variant options |
| Quantity per Order | 1 pcs (per variant selected) |
The tooth count determines the pitch circle diameter (PCD = Module × Teeth) and your gear ratio. For a rack-and-pinion axis, a higher tooth count gives more linear travel per motor revolution; a lower count gives more torque. Match the mating gear or rack to the same Module 1.5 specification, then select the tooth count that achieves your target ratio or travel-per-step.
Measure your motor or drive shaft diameter precisely. Common NEMA 17 motors use a 5 mm shaft (not listed — check compatibility) while NEMA 23 motors typically use 6.35 mm or 8 mm shafts. For keyed shafts, select the keyway variant that matches your shaft's key dimensions. When in doubt, choose the next size up and use a shaft adapter or bore-reduction bushing.
Aluminium Module 1.5 spur gears are well-suited for moderate-speed, moderate-load applications such as CNC router axes, 3D printer drives, and light robotic joints. For very high-speed or heavy-load continuous-duty cycles, consider the tooth count, lubrication, and mating gear material. Aluminium-on-aluminium meshing at high speeds may increase wear; pairing with a steel rack or mating gear is common practice.
The natural aluminium finish provides good oxidation resistance for typical indoor workshop and light-industrial use. For outdoor or high-humidity environments, applying a thin coat of machine oil or a dry-film lubricant to the tooth faces will extend service life. Anodising is not included but can be applied by a local finishing shop if needed.
Yes — any gear or rack marked Module 1.5 (Mod 1.5) with a standard 20° pressure angle will mesh correctly with these pinions. Verify that your existing component is Module 1.5 and not a similar-looking metric pitch (e.g., 0.8 MOD or 32 DP imperial), as these are not interchangeable.
Plain bore variants (6–12 mm) use one or two set screws threaded into the hub to clamp onto a smooth shaft. Keyway variants include a machined slot that accepts a standard key, providing positive rotational locking and higher torque transmission without relying solely on set-screw friction. Choose keyway if your shaft already has a key or if you need to transmit higher torque reliably.
Each order includes 1 piece (1 pcs) of the selected variant — one gear in the tooth count and bore size you choose. If you need multiple gears for a multi-axis machine or a matched gear pair, simply increase the quantity at checkout or add multiple variants to your cart.
