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When your build demands a clean 90° direction change without sacrificing torque or rotational accuracy, a mismatched or low-tolerance gear set becomes the weakest link in your drivetrain. Engineers, robotics builders, and precision DIY machinists need a bevel gear set that meshes consistently, runs quietly, and holds its geometry under load. This Module 1 aluminium bevel gear set delivers exactly that — a matched 1:1 ratio pair engineered for repeatable, low-backlash right-angle transmission.
Each set consists of two identical bevel (miter) gears machined from aluminium alloy, available in 15, 20, 25, or 30 tooth configurations. Bore diameters range from 4mm to 12mm (~0.16" to ~0.47"), with select variants offering a 3mm or 4mm keyway for positive shaft locking. Module 1 pitch ensures compatibility with standard M1 gear systems across metric drivetrain designs.
Typical applications include desktop CNC axis drives requiring compact right-angle gearing, robotics joint assemblies where a lightweight aluminium miter gear set reduces inertia, and custom automation or 3D-printer extruder mechanisms that benefit from a precision bevel gear pair with consistent tooth engagement.
Both gears in the set share identical tooth counts, delivering a true 1:1 speed and torque ratio — ideal for right-angle shaft redirection without ratio change.
Machined from aluminium alloy for a strong strength-to-weight ratio. Reduces rotational inertia compared to steel alternatives — well-suited for speed-sensitive or weight-critical assemblies.
Standard M1 module pitch ensures accurate meshing with other M1 components. Precision-cut tooth geometry minimises backlash and noise during operation.
Available in 15T, 20T, 25T, and 30T configurations. Higher tooth counts increase gear diameter and load-bearing surface area — select based on torque requirements and available space.
Bore sizes from 4mm to 12mm accommodate a broad range of motor and shaft diameters. Keyway variants (3mm or 4mm) provide positive shaft engagement to prevent slippage under load.
Designed to integrate directly into existing Module 1 gear assemblies. No custom machining required for standard bore sizes — select your shaft diameter and install.
| Gear Type | Bevel / Miter Gear (90° mesh) |
|---|---|
| Module | 1 (M1) |
| Gear Ratio | 1:1 |
| Material | Aluminium Alloy |
| Tooth Count Options | 15T / 20T / 25T / 30T |
| Bore Diameter Options | 4mm / 5mm / 6mm / 8mm / 10mm / 12mm |
| Keyway Options | 8mm + 3mm Keyway / 10mm + 4mm Keyway / 12mm + 4mm Keyway |
| Pressure Angle | See variant options |
| Pitch Diameter (approx.) | 15T ≈ 15mm / 20T ≈ 20mm / 25T ≈ 25mm / 30T ≈ 30mm |
| Mesh Angle | 90° |
| Quantity per Set | 2 gears (matched pair) |
| Finish | Natural aluminium (uncoated) |
| Weight | See variant options |
For a 1:1 bevel gear set, tooth count does not affect the speed ratio — both gears always turn at the same RPM. Instead, choose based on physical size and load: a 15T gear has a smaller pitch diameter (~15mm) and suits compact, lightweight builds, while a 30T gear (~30mm pitch diameter) offers more tooth contact area and handles higher torque loads. Match the gear's outer diameter to the space available in your assembly.
Measure your motor or drive shaft diameter precisely with calipers. Select the bore size that matches — for example, a 6mm shaft requires the 6mm bore variant. If your shaft is between sizes, do not select a smaller bore; instead, choose the next size up and use a shaft collar or set screw to secure it. For shafts requiring positive locking under high torque, choose a keyway variant.
Keyway variants are recommended when the gear must transmit significant torque without slipping on the shaft. A set screw alone can loosen under vibration or reversing loads. The 3mm keyway (for 8mm bore) and 4mm keyway (for 10mm and 12mm bore) variants accept a standard parallel key, providing a positive mechanical connection between the gear and shaft. For light-duty or low-torque applications, a standard bore with a set screw is typically sufficient.
Yes — Module 1 is a standardised metric pitch, so these aluminium gears will mesh correctly with any other M1 bevel gear of the same tooth count and pressure angle, regardless of material. However, when pairing aluminium with steel gears under heavy load, be aware that aluminium teeth will wear faster. For mixed-material pairings in high-load applications, consider replacing both gears with the same material or using the aluminium set in lighter-duty roles.
Aluminium alloy gears offer a good strength-to-weight ratio and are well-suited for light to medium duty applications such as robotics, 3D printers, CNC axis drives, and automation equipment. They are significantly lighter than steel, which reduces inertia in dynamic systems. For heavy industrial loads, continuous high-torque operation, or abrasive environments, steel gears are generally more durable. These aluminium miter gears are designed for precision, weight-sensitive builds rather than heavy industrial use.
Light lubrication is recommended for extended service life, particularly in continuous-duty applications. A thin film of white lithium grease or a dry PTFE lubricant applied to the tooth faces at installation will reduce wear and noise. For intermittent or low-speed applications (such as manual positioning mechanisms), lubrication is beneficial but not strictly required. Avoid heavy oil-based lubricants that may attract dust and debris in open-frame assemblies.
The set is sold as a matched pair of two identical gears. While you can technically use a single gear from the set paired with another M1 bevel gear of the same tooth count from a different source, the gears in this set are matched and will mesh optimally with each other. Using both gears from the same set ensures consistent tooth geometry and minimises backlash.
