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When your drivetrain demands a reliable 90° power transfer without backlash-prone plastic parts, engineers and makers reach for a machined steel bevel gear. These Module 1.5 bevel gears are designed for hobbyists, robotics builders, CNC enthusiasts, and light industrial integrators who need a matched pair that transmits torque cleanly at a 1:1 ratio.
Each gear is machined from C45 medium-carbon steel and finished with a hardened black oxide coating for corrosion resistance and reduced surface friction. Available in four tooth counts — 16T, 20T, 25T, and 30T — with bore diameters ranging from 6 mm (0.24 in) to 20 mm (0.79 in), including keyway options (4 mm and 5 mm/6 mm keyways) for positive shaft locking. Outer diameter scales with tooth count, typically 27–48 mm (1.06–1.89 in).
Typical use cases include right-angle gearbox assemblies for CNC router Z-axis drives, differential steering mechanisms in wheeled robots, compact bevel gear sets for 3D printer extruder upgrades, and custom power transmission rigs where a 1:1 speed ratio is required.
C45 Medium-Carbon Steel Construction — Machined from C45 steel for a balance of machinability and tensile strength, suitable for moderate-load right-angle drives in robotics and automation rigs.
Hardened Black Oxide Finish — The black oxide surface treatment reduces bare-metal corrosion, lowers friction at the tooth interface, and gives a clean industrial appearance without adding dimensional bulk.
Module 1.5 Tooth Profile — Standard metric Module 1.5 pitch ensures interchangeability with other M1.5 bevel gears and simplifies center-distance calculations in your drivetrain design.
True 1:1 Gear Ratio — Matched same-tooth-count pairs deliver a precise 1:1 speed and torque ratio, ideal for right-angle redirects where no speed change is needed.
Multiple Bore & Keyway Options — Choose plain bores (6–16 mm) or keyway bores (12 mm+4 mm key, 14–16 mm+5 mm key, 17–20 mm+5/6 mm key) for secure shaft engagement without set-screw slip.
Flexible Pack Quantities — Available in 1, 2, 3, 4, 5, or 10-piece packs so you can order a single replacement gear or stock up for a production run at a lower per-unit cost.
| Gear Module | 1.5 |
|---|---|
| Gear Ratio | 1:1 |
| Tooth Count Options | 16T / 20T / 25T / 30T |
| Material | C45 Medium-Carbon Steel |
| Surface Treatment | Black Oxide (Hardened) |
| Bore Diameter Range | 6 mm – 20 mm (0.24 – 0.79 in) |
| Keyway Options | 4 mm / 5 mm / 6 mm (bore-dependent) |
| Pressure Angle | 20° |
| Shaft Angle | 90° |
| Outer Diameter (approx.) | See variant options |
| Face Width | See variant options |
| Pack Quantity | 1 / 2 / 3 / 4 / 5 / 10 pcs |
For a 1:1 ratio, both mating gears must have the same tooth count. Choose a higher tooth count (25T or 30T) when you need smoother, quieter operation or when your shaft diameter requires a larger bore. Lower tooth counts (16T or 20T) are more compact and suit space-constrained builds. All four options share the same Module 1.5 pitch, so center distance scales predictably.
Match the bore to your shaft diameter. Plain bores (6–16 mm) work well with set screws or press fits for light-duty applications. Keyway bores are recommended when transmitting higher torque or when the gear must not slip under reversing loads — the key provides a positive mechanical lock between the gear and shaft. Select the keyway size that matches your shaft's existing keyway slot.
C45 steel has a tensile strength of approximately 600–800 MPa, making these gears suitable for moderate-load applications such as CNC axis drives, robotic joints, and light conveyor redirects. For heavy industrial loads or continuous high-speed operation, consult a mechanical engineer to verify the gear's rated torque capacity against your application's peak load.
Black oxide provides mild corrosion resistance by converting the surface iron to magnetite, which slows oxidation. For indoor or dry environments it performs well. In humid or outdoor conditions, apply a light machine oil or grease to the tooth surfaces for additional protection. The finish also reduces light reflection and lowers the coefficient of friction at the mesh point.
Yes — bevel gears of the same module can be meshed with different tooth counts to achieve speed ratios other than 1:1. For example, pairing a 20T with a 30T gear gives a 1.5:1 ratio. However, this listing is optimized for matched same-tooth-count pairs (1:1 ratio). Verify that the pitch cone geometry is compatible before mixing tooth counts from different product lines.
Yes. A bevel gear drive requires at least two mating gears. For a 1:1 ratio, order two gears with the same tooth count and compatible bore sizes for your two shafts. The multi-piece pack options (2, 3, 4, 5, or 10 pcs) are a convenient way to order a matched pair or multiple sets in one transaction at a reduced per-unit price.
For most hobby and light industrial applications, a lithium-based grease (NLGI Grade 1 or 2) applied to the tooth flanks is sufficient. For higher-speed applications, a gear oil (ISO VG 68–150) circulated or splash-lubricated is preferred. Avoid dry running — even a thin film of lubricant significantly extends tooth life and reduces noise.
