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When your drive system needs to change direction without losing torque, a mismatched or imprecise bevel gear becomes the weakest link in your build. Engineers, robotics hobbyists, and mechanical DIYers working on right-angle drive assemblies need module 1 brass bevel miter gears that mesh cleanly, hold tight tolerances, and resist wear over extended duty cycles.
These Module 1 brass bevel gears are available in 15, 20, 30, and 40 tooth counts, machined from solid brass for a balance of machinability and corrosion resistance. Bore sizes range from 4 mm (0.16 in) to 15 mm (0.59 in), with keyway options available on larger bores. Each gear is designed as a 90° 1:2 pairing miter set, meaning a 15T gear pairs with a 30T gear, and a 20T gear pairs with a 40T gear for a 2:1 reduction ratio.
Typical use cases include right-angle gearbox assemblies for CNC router axis drives, custom robotic arm joints requiring a 2:1 speed reduction, and small-scale mechanical automation projects such as conveyor direction changes and rotary indexing tables.
Machined from brass for reliable corrosion resistance, smooth meshing, and low-noise operation in both dry and lightly lubricated environments.
Standard Module 1 pitch ensures accurate gear meshing with minimal backlash, compatible with any Module 1 bevel gear counterpart.
Engineered for exact 90-degree right-angle power transmission — ideal for changing drive direction in compact mechanical assemblies.
15T pairs with 30T; 20T pairs with 40T — delivering a clean 2:1 speed reduction or 1:2 speed increase depending on drive configuration.
Bore sizes from 4 mm to 15 mm (0.16–0.59 in), with keyway variants (4 mm and 5 mm) available on 12 mm, 14 mm, and 15 mm bores for positive shaft locking.
Suited for robotics joints, CNC axis drives, conveyor direction changes, rotary indexing tables, and custom mechanical automation projects.
| Material | Brass |
|---|---|
| Module | 1 |
| Tooth Count Options | 15T, 20T, 30T, 40T |
| Pairing Ratio | 1:2 (15T↔30T, 20T↔40T) |
| Shaft Angle | 90° |
| Bore Size Options | 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 12 mm + 4 mm Keyway, 14 mm + 5 mm Keyway, 15 mm + 5 mm Keyway |
| Pressure Angle | 20° (standard Module 1) |
| Outer Diameter | See variant options |
| Face Width | See variant options |
| Weight | See variant options |
| Finish | Natural brass (uncoated) |
| Quantity | 1 pc per order (pair sold separately) |
For a 2:1 speed reduction, pair the 15-tooth gear (driver) with the 30-tooth gear (driven), or pair the 20-tooth gear with the 40-tooth gear. Both combinations produce a 90° shaft angle with a 1:2 ratio. If you need a 1:1 ratio, you would need two gears of the same tooth count — contact us to confirm availability.
Each listing sells 1 piece per order. To complete a mating pair (e.g., 15T + 30T), you need to add both tooth counts to your cart separately. Select the correct tooth count and bore size for each gear in your drive assembly.
Match the bore size to your shaft diameter. Available bores are 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, and keyway variants at 12 mm, 14 mm, and 15 mm. For shafts that transmit significant torque, choose a keyway bore to prevent slipping. Measure your shaft with calipers before ordering.
Brass offers good resistance to atmospheric corrosion and mild moisture exposure, making it suitable for indoor mechanical assemblies and light-duty outdoor enclosures. It is not recommended for continuous immersion in water or exposure to strong acids. For harsh environments, consider stainless steel alternatives.
Brass is a moderate-strength material well-suited for light-to-medium duty applications such as robotics, instrumentation, and small CNC drives. For heavy industrial loads or high-speed continuous operation, steel bevel gears are typically recommended. The 40-tooth gear, being larger in diameter, will generally handle higher torque than the 15-tooth gear at the same module.
Yes. Select the bore size that matches your motor shaft diameter. Common stepper motor shaft sizes are 5 mm and 6.35 mm — the 5 mm and 6 mm bore options cover most standard NEMA 17 and NEMA 23 stepper shafts. For servo motors with larger shafts, the 8 mm–15 mm bore variants are available, including keyway options for positive torque transfer.
Brass gears can run dry at low speeds and light loads, but applying a thin film of gear grease or light machine oil at the mesh point will significantly extend service life and reduce noise. For continuous-duty or higher-speed applications, periodic re-lubrication is recommended.
