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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 the chain. Engineers, robotics builders, and hands-on makers who demand reliable 90° power transfer need a gear that holds tight tolerances and pairs cleanly — every time. These 1 Mod bevel gears are designed for exactly that.
Each gear is machined from metal (typically steel or brass alloy) with a module of 1 and a pressure angle of 20°. Available in 20T, 25T, and 30T tooth counts, with bore diameters ranging from 5mm to 12mm (approximately 0.20" to 0.47"). The 90° 1:1 mating configuration means same-tooth-count pairs mesh directly for equal-ratio direction changes.
Typical use cases include CNC router axis drives, RC vehicle differentials, desktop robotic arm joints, and custom gearbox assemblies where a compact 90° bevel gear set for 5mm shaft or 12mm bore shaft is required.
| Module | 1 |
|---|---|
| Pressure Angle | 20° |
| Shaft Angle | 90° |
| Gear Ratio | 1:1 |
| Tooth Count (Model) | 20T / 25T / 30T (see variant options) |
| Bore Diameter | 5mm / 6mm / 8mm / 10mm / 12mm (see variant options) |
| Material | Metal alloy (see variant options) |
| Finish | See variant options |
| Outer Diameter | See variant options |
| Face Width | See variant options |
| Hub Diameter | See variant options |
| Keyway | Contact us to confirm |
All three options produce a 1:1 ratio when paired with a matching tooth-count gear. Choose based on the physical space in your gearbox: 20T is the most compact, 30T offers a larger pitch diameter and smoother load distribution. If torque capacity is a concern, a higher tooth count generally distributes load across more teeth.
Select the bore that matches your shaft diameter exactly. Available bores are 5mm, 6mm, 8mm, 10mm, and 12mm. If your shaft is metric, match directly. For imperial shafts, convert first (e.g., 1/4" ≈ 6.35mm — in that case, a 6mm bore would be too tight; contact us to confirm fit).
No. For a proper 90° 1:1 mesh, both gears in the pair must have the same tooth count and the same module (Mod 1). Mixing tooth counts will result in incorrect gear ratios and poor mesh geometry, leading to noise and accelerated wear.
These are metal alloy gears. Corrosion resistance depends on the specific alloy and surface finish of the variant you select. For environments with moisture or chemical exposure, consider applying a compatible gear lubricant or protective coating. Contact us to confirm the material specification for your chosen variant.
These gears are well-suited for CNC machines, robotics, RC vehicles, custom gearboxes, automation equipment, and any mechanical assembly requiring a compact 90° right-angle drive. They are not recommended for high-shock or extreme-load industrial applications without engineering review.
Keyway availability depends on the specific variant. Please contact us to confirm whether your selected model includes a keyway or set screw provision. For most DIY and light-duty applications, a set screw hub is the standard securing method.
Module is the metric gear standard (Mod 1 = 1mm per tooth of pitch diameter). Diametral pitch is the imperial equivalent. These gears are Mod 1 metric. They are not directly interchangeable with DP gears. If your existing system uses DP gears, these will not mesh correctly.
