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When a right-angle drive solution fails mid-project, the entire mechanism stalls. Engineers, machine builders, and serious DIYers who need a dependable 90° power transfer between intersecting shafts require a bevel gear pair that holds its geometry under load — not one that wears out of mesh after a few hundred cycles.
This listing covers a matched bevel gear set machined from C45 medium-carbon steel, available in Module 1.5 with a 1:3 tooth ratio (15-tooth pinion paired with 45-tooth gear). Bore sizes range from 8mm to 16mm (~0.31" to ~0.63"), with keyway options (4mm or 5mm) available on the larger bore variants. The gears receive a hardened black surface treatment for improved wear resistance and corrosion protection.
Typical applications include right-angle gearbox assemblies for conveyor drives, DIY CNC router axis conversions, small agricultural equipment power take-offs, and custom robotics joint mechanisms requiring a compact 1:3 speed reduction at 90°.
Machined from C45 medium-carbon steel for a balance of machinability and mechanical strength, suitable for moderate-load right-angle drive applications.
The blackening treatment improves surface hardness and provides a base layer of corrosion resistance, extending service life in workshop and light industrial environments.
A 1:3 speed reduction ratio with Module 1.5 tooth geometry ensures smooth meshing and predictable torque multiplication across the gear pair.
Available in 8mm and 10mm plain bores, plus 12mm/4mm keyway, 14mm/5mm keyway, 15mm/5mm keyway, and 16mm/5mm keyway — covering a wide range of shaft standards.
Order 1, 2, or 3 sets per purchase to match your project scale, with per-unit pricing that reflects multi-pack value.
Engineered for true 90° power transmission between intersecting shafts, making these gears a direct fit for right-angle gearbox designs without additional adapters.
| Module | 1.5 |
|---|---|
| Tooth Ratio | 1:3 (15T pinion / 45T gear) |
| Material | C45 Medium-Carbon Steel |
| Surface Treatment | Hardened Black |
| Bore Size Range | 8mm – 16mm (approx. 0.31" – 0.63") |
| Keyway Options | 4mm (12mm bore) / 5mm (14mm, 15mm, 16mm bore) |
| Pressure Angle | See variant options |
| Shaft Angle | 90° |
| Pitch Diameter — 15T | 22.5mm (approx. 0.89") |
| Pitch Diameter — 45T | 67.5mm (approx. 2.66") |
| Face Width | See variant options |
| Pack Quantity | 1 pcs / 2 pcs / 3 pcs (select above) |
Measure your shaft diameter with a caliper. For plain shafts, choose the matching plain bore (8mm or 10mm). If your shaft uses a key for torque transmission, select the keyway variant that matches your shaft diameter and key width — for example, a 12mm shaft with a 4mm key should use the "12mm + 4mm Keyway" option. Always verify the fit before final assembly.
Each listing variant represents one gear (either the 15T pinion or the 45T gear). To achieve the 1:3 ratio drive, you need one of each. Select the same bore size for both gears to match your shaft dimensions, or different bores if your input and output shafts differ in diameter.
C45 steel bevel gears at Module 1.5 are suited for light-to-moderate torque applications — typically small machinery, DIY automation, and robotics. Exact load ratings depend on operating speed, lubrication, and mounting rigidity. For heavy industrial loads or continuous high-speed operation, consult an engineer to verify suitability.
The blackening treatment offers a base level of corrosion resistance suitable for indoor workshop and light industrial environments. For outdoor use or exposure to moisture, coolants, or chemicals, applying a light machine oil or grease to the gear teeth is recommended to extend service life.
Yes — Module 1.5 is a standardized gear metric, so these gears are dimensionally compatible with other Module 1.5 bevel gears that share the same pressure angle and shaft angle (90°). Always confirm the pressure angle specification matches before mixing components from different sources.
In a 1:3 ratio pair, the 15-tooth pinion is the input (driver) and the 45-tooth gear is the output (driven). If the pinion rotates at 300 RPM, the output gear rotates at 100 RPM — a 3× speed reduction with a corresponding 3× torque increase (minus friction losses). Reverse the driver/driven assignment to achieve a 3:1 speed increase instead.
Standard workshop tools are sufficient: a shaft press or mallet for bore fitting, a key and keyway file for keyway variants, and a torque wrench for set screws if your application uses them. Ensure the gear pair is mounted so the pitch cones intersect at the shaft crossing point for correct mesh and minimal backlash.
