Module 0.5/1/1.5 Precision Spur Gear Aluminium 12-60 Tooth Motor Pinion with Hub

The module (m) defines the tooth size and pitch of a gear. To mesh correctly, two gears must share the same module. Module 0.5 gears have smaller, finer teeth suited for compact, low-torque drives such as 3D printer extruders or small servo mechanisms. Module 1 gears are the most common general-purpose size, used in robotics, CNC machines, and automation. Module 1.5 gears have larger teeth and handle higher torque loads. Match the module of this gear to the module of your mating gear or rack.

Measure your motor or drive shaft diameter precisely with a caliper. Select the bore size that matches your shaft. For light-duty or low-speed applications, a plain bore with a set screw is typically sufficient. If you are transmitting significant torque or need to prevent rotational slip under load, choose a keyway bore variant — the keyway provides a positive mechanical lock between the shaft and gear. Keyway dimensions (e.g., 12 mm bore + 4 mm key) must match the keyway cut on your shaft.

Aluminium alloy spur gears are suitable for light to moderate torque applications. They are not recommended for heavy industrial drives where steel gears are the standard. Exact load ratings depend on the module, tooth count, face width, and operating speed. For robotics, 3D printers, small CNC machines, and educational automation projects, aluminium gears provide adequate strength while keeping weight low. Contact us to confirm suitability for your specific load and speed requirements.

Aluminium alloy naturally forms a thin oxide layer that provides moderate corrosion resistance in dry and mildly humid environments. These gears are not recommended for continuous exposure to water, salt spray, or aggressive chemicals without additional surface treatment. For outdoor or wet environments, consider applying a compatible lubricant or protective coating, or contact us to discuss alternative material options.

Standard (no-hub) variants have a gear body width equal to the face width of the teeth, providing a compact profile. Hub variants (25 mm or 35 mm hub) extend the bore section beyond the gear face, giving more shaft engagement length. This is useful when you need to position the gear further along a shaft, when using a set screw or keyway that requires more material depth, or when the gear must be cantilevered and needs better axial support. Hub variants are available on Module 1 gears with 40T, 50T, and 60T tooth counts.

Yes. These gears are machined to standard metric module specifications with a 20° pressure angle, which is the international standard for metric spur gears. A Module 1 gear from this listing will mesh correctly with any other Module 1 rack, pinion, or mating gear that also uses a 20° pressure angle. The same applies to Module 0.5 and Module 1.5. Always verify the module and pressure angle of your mating components before assembly.

Yes, these gears are designed for use as motor pinions. Select the bore diameter that matches your motor output shaft. For DC motors and servo motors with standard shaft diameters (4 mm, 5 mm, 6 mm, 8 mm are the most common), choose the corresponding plain bore variant. If your motor shaft has a flat or D-cut, a set screw through the gear hub will engage the flat. For shafts with a machined keyway, select the appropriate keyway bore variant for a secure, slip-free connection.