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When a DIY robotics build, CNC axis, or custom gearbox demands a clean 90° direction change without sacrificing torque, a mismatched or worn bevel gear becomes the weakest link in the drivetrain. These 1 Module (1M) bevel gears are engineered for makers, engineers, and hobbyists who need repeatable, low-backlash right-angle transmission in compact assemblies.
Each gear is machined from steel (typically carbon steel or alloy steel) with a module of 1 and a 1:1 transmission ratio, meaning the paired drive and driven gears share the same tooth count. Available tooth counts range from 15T to 30T, with outer diameters typically spanning 15 mm to 32 mm (approx. 0.59"–1.26") and face widths of approximately 6–10 mm (0.24"–0.39"). Bore diameter varies by model — see variant options for exact bore specs.
Typical applications include: desktop CNC router Z-axis drives, small robotic arm joints requiring 90° torque transfer, DIY lathe cross-slide mechanisms, and custom RC vehicle differentials. Long-tail use cases: 1 module bevel gear pair for robotics, 1M right-angle gear set for CNC, small bevel gear 1:1 ratio hobbyist.
| Module | 1 (M1) |
|---|---|
| Transmission Ratio | 1:1 |
| Available Tooth Counts | 15T, 16T, 18T, 20T, 24T, 25T, 26T, 28T, 30T |
| Outer Diameter (OD) | Typically 15–32 mm (0.59"–1.26") — See variant options |
| Face Width | Typically 6–10 mm (0.24"–0.39") — See variant options |
| Bore Diameter | See variant options |
| Pressure Angle | 20° |
| Shaft Angle | 90° |
| Material | Carbon steel / Alloy steel |
| Surface Finish | Machined, natural steel finish |
| Weight (per piece) | See variant options |
| Sold As | 1 piece per order |
For a 1:1 ratio, both the drive and driven gears must have the same tooth count. Choose a tooth count that fits your shaft center distance — higher tooth counts (e.g., 28T, 30T) result in larger outer diameters and are suited for applications needing more contact area and smoother meshing. Lower counts (15T, 16T) are more compact and suited for tight spaces.
These steel bevel gears are suitable for light-to-medium duty continuous operation, such as small CNC drives, robotic joints, and hobby machinery. For heavy industrial loads or high-RPM applications exceeding the gear's rated torque, consult the load specifications for your specific tooth count variant before use.
The gears are machined from carbon or alloy steel with a natural finish. They are not inherently corrosion-resistant in wet or outdoor environments. For humid or mildly corrosive conditions, apply a light machine oil or grease coating. For harsh environments, consider stainless steel alternatives.
Yes — as long as your existing gears conform to the Module 1 (M1) standard with a 20° pressure angle and 90° shaft angle, these gears should mesh correctly. Always verify the tooth count, bore diameter, and module before pairing with gears from other sources.
Bore diameter varies by tooth count variant. Please check the variant detail or product images for the specific bore size of the model you are ordering. If you need a custom bore size, contact us to confirm availability.
Each order contains 1 piece (single gear). If you need a meshing pair for a 1:1 drive, order two units of the same tooth count — one for each shaft. This gives you full flexibility to replace only the worn gear in an existing assembly.
The primary difference is physical size. A 15T gear has a smaller outer diameter (approx. 15–17 mm) and is suited for compact, lightweight assemblies. A 30T gear has a larger outer diameter (approx. 30–32 mm), offers more tooth contact area, and typically runs more smoothly at higher loads. Both maintain the same 1:1 ratio when paired with an identical tooth-count partner gear.
