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When your drivetrain needs to change direction without losing torque, a mismatched or low-precision bevel gear becomes the weakest link in your build. Whether you are a robotics hobbyist, a CNC machine builder, or an industrial automation engineer, these metric bevel gears give you the dimensional accuracy and material integrity needed to transmit power reliably at a 90° shaft angle.
Each bevel gear in this series is machined from carbon steel and features a precisely cut tooth profile across four module sizes — 1M, 1.5M, 2M, and 2.5M — with 20-tooth or 30-tooth configurations. Bore diameters range from 6mm (0.24 in) up to 30mm (1.18 in), with plain bore or bore-plus-keyway options available depending on the model. The 90° mesh angle ensures a clean, low-backlash engagement between mating pairs.
These bevel gears are well suited for DIY gearbox assemblies requiring a 1:1.5 speed ratio, CNC axis drive systems where compact right-angle power transfer is critical, and light industrial automation rigs where repeatable torque delivery across a 90° bevel gear set is essential.
Available in Mod 1, 1.5, 2, and 2.5 to cover a wide range of torque and speed requirements. Select the module that matches your mating gear for correct pitch engagement.
Choose 20-tooth for a compact, lighter-duty configuration or 30-tooth for increased contact ratio and smoother torque delivery in higher-load applications.
Engineered for a true 90° shaft intersection, enabling right-angle power transmission without the need for additional gearbox housings or complex coupling arrangements.
Plain bore options from 6mm to 15mm and bore-plus-keyway configurations from 12mm to 30mm allow secure shaft mounting across a broad range of motor and shaft sizes.
Machined from carbon steel for a balance of machinability, strength, and wear resistance suitable for light-to-medium duty mechanical drive applications.
Order as a single piece for prototyping or in packs of 2, 3, or 5 for production builds and spare-parts inventory — all at a consistent per-unit specification.
| Module (Mod) | 1 / 1.5 / 2 / 2.5 |
|---|---|
| Tooth Count | 20T or 30T (see variant options) |
| Mesh Angle | 90° |
| Speed Ratio | 1:1.5 (20T:30T pairing) |
| Bore Diameter | 6 / 8 / 10 / 12 / 14 / 15 / 16 / 18 / 20 / 22 / 24 / 25 / 28 / 30 mm (see variant options) |
| Keyway | 4mm / 5mm / 6mm / 8mm (available on select bore sizes; see variant options) |
| Material | Carbon Steel |
| Finish | See variant options |
| Pitch Diameter (Mod 1, 20T) | 20mm (0.79 in) |
| Pitch Diameter (Mod 2.5, 30T) | 75mm (2.95 in) |
| Pack Quantity | 1 / 2 / 3 / 5 pcs (see variant options) |
| Application | Right-angle power transmission, robotics, CNC, DIY gearboxes |
The module (Mod) determines the tooth size and pitch. Larger modules handle higher torque loads. For light-duty robotics or small mechanisms, Mod 1 or 1.5 is typically sufficient. For CNC drives or heavier automation, Mod 2 or 2.5 provides greater tooth strength. Always match the module of both mating bevel gears — mismatched modules will not mesh correctly.
You can pair two gears of the same tooth count (e.g., 20T with 20T) for a 1:1 speed ratio, or pair 20T with 30T for a 1:1.5 ratio. Both pairings are valid as long as the module matches. The 1:1.5 ratio is the primary design intent of this series, but 1:1 pairing is mechanically compatible.
A plain bore is a smooth cylindrical hole — the gear is typically secured to the shaft using a set screw or press fit. A bore-plus-keyway option includes a machined slot (keyway) that accepts a key inserted between the shaft and gear hub, providing a positive rotational lock and preventing slippage under torque. For driven applications with significant load, the keyway variant is recommended.
These gears are machined from carbon steel, which offers good strength but moderate corrosion resistance. For indoor or dry environments, they perform reliably with standard lubrication. For humid or outdoor environments, applying a light machine oil or grease coating is recommended to prevent surface oxidation. If corrosion resistance is a primary requirement, consider stainless steel alternatives.
Measure your motor or drive shaft diameter with a caliper. Select the bore variant that matches your shaft diameter exactly. For keyway variants, also confirm the keyway width matches your shaft's key slot — the keyway dimensions are listed in each variant name (e.g., "Bore 14mm + Keyway 5mm" means a 5mm wide keyway slot).
A light gear oil or lithium-based grease applied to the tooth contact surfaces is recommended for most applications. For low-speed, low-load DIY builds, a general-purpose machine oil is sufficient. Avoid dry running, especially under load, as it accelerates tooth wear on carbon steel gears.
Yes. These metric bevel gears are commonly used in CNC axis drives, extruder gearboxes, and right-angle transmission stages in 3D printers and router machines. Select the module and bore size that matches your existing drive components. For CNC applications requiring low backlash, ensure the gear pair is properly aligned and preloaded during assembly.
