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When a right-angle power transmission fails mid-project, the culprit is almost always an undersized or poorly finished gear. Engineers, hobbyists, and machine builders who need a reliable 90° direction change without backlash or premature wear will find these Module 1 bevel gears a dependable solution. Available in a 1:3 ratio pairing (15-tooth pinion and 45-tooth wheel), they are suited for both light-duty DIY builds and repetitive industrial drive cycles.
Each gear is machined from C45 medium-carbon steel and finished with a hardened black surface treatment for improved wear resistance and corrosion protection. The module is 1 (metric), with tooth counts of 15T (pinion) or 45T (wheel), and bore sizes ranging from 6 mm (0.24 in) to 12 mm (0.47 in). Outer diameter varies by tooth count: the 15T gear measures approximately 17 mm (0.67 in) and the 45T gear approximately 47 mm (1.85 in). Available in quantities of 1 to 5 pieces per order.
Typical use cases include CNC router axis drives requiring a 1:3 speed reduction, 3D printer extruder gearbox assemblies needing compact right-angle transmission, and custom robotics or automation rigs where a hardened bevel gear set replaces worn plastic or cast components.
Machined from C45 medium-carbon steel for a balance of machinability and tensile strength, suitable for continuous rotational loads in drive assemblies.
The blackening treatment increases surface hardness and provides a degree of corrosion resistance, extending service life in workshop and light-industrial environments.
15-tooth pinion paired with 45-tooth wheel delivers an exact 3:1 speed reduction (or 1:3 speed increase), enabling precise torque multiplication in right-angle drive configurations.
Available in 6 mm, 8 mm, 10 mm, and 12 mm bore diameters to fit a wide range of standard shaft sizes without custom machining.
Order 1 to 5 pieces per SKU — ideal for prototyping single units or stocking spares for multi-axis machines and production lines.
Bevel tooth geometry enables smooth power transfer between intersecting shafts at 90°, making these gears a compact alternative to worm gear or belt-and-pulley setups.
| Module | 1 (metric) |
|---|---|
| Ratio | 1:3 |
| Tooth Count | 15T (pinion) / 45T (wheel) |
| Material | C45 medium-carbon steel |
| Surface Treatment | Hardened black finish |
| Bore Size | 6 mm / 8 mm / 10 mm / 12 mm (See variant options) |
| Outer Diameter (15T) | Approx. 17 mm (0.67 in) |
| Outer Diameter (45T) | Approx. 47 mm (1.85 in) |
| Pressure Angle | 20° |
| Shaft Angle | 90° |
| Quantity per Order | 1 / 2 / 3 / 4 / 5 pcs (See variant options) |
| Weight (per piece) | See variant options |
Yes. The 15-tooth pinion (Module 1【15 Tooth】) and the 45-tooth wheel (Module 1【45 Tooth】) are listed as separate variants. To achieve the 1:3 ratio drive, you need one of each. Make sure both share the same bore size, or plan to use a keyway or set-screw adapter if shaft diameters differ.
Measure your shaft diameter with a caliper before ordering. Available bore sizes are 6 mm, 8 mm, 10 mm, and 12 mm. The bore should match your shaft diameter exactly — a loose fit causes vibration and accelerated wear, while an oversized shaft will not insert. If your shaft falls between sizes, select the next larger bore and use a keyway or Loctite retaining compound.
C45 steel has a tensile strength of approximately 600–800 MPa depending on heat treatment. These gears are suited for light-to-medium duty applications such as CNC machines, 3D printers, and small automation rigs. For heavy industrial loads exceeding continuous torque requirements of your application, consult a mechanical engineer to verify the gear's rated torque against your system's demand.
The hardened black surface treatment provides moderate corrosion resistance suitable for indoor workshop and light-industrial use. For outdoor, marine, or high-humidity environments, we recommend applying a thin coat of gear grease or anti-rust oil and re-applying periodically. For fully corrosion-resistant applications, consider stainless steel alternatives.
Yes, provided the other gear also conforms to Module 1 metric standards with a matching 20° pressure angle and 90° shaft angle. Module is a standardized metric measurement, so gears from different manufacturers with the same module should mesh correctly. Always verify tooth count and pressure angle before mixing gear sets.
For most applications, a medium-viscosity gear grease (NLGI Grade 1 or 2) applied to the tooth flanks before assembly is sufficient. For high-speed applications, a splash-lubricated oil bath may be more appropriate. Avoid dry running — even brief unlubricated operation accelerates tooth wear on steel bevel gears.
If you are prototyping or replacing a single failed gear, 1 pcs is the right choice. For multi-axis machines (e.g., a 3-axis CNC router), ordering 2–3 sets at once reduces downtime if a gear needs replacement mid-project. The per-piece cost decreases with higher quantities, making 4–5 pcs a cost-effective option for production runs or spare parts inventory.
