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When your drivetrain demands a reliable right-angle power transfer, a poorly matched bevel gear creates backlash, noise, and premature wear that stalls your entire project. These 45# steel bevel gears are engineered for makers, robotics builders, CNC hobbyists, and mechanical engineers who need a repeatable 1:1 ratio at a true 90° meshing angle without compromise.
Each gear is machined from 45# carbon steel, offering a solid balance of hardness and toughness for demanding drive applications. Available in four module sizes — 1M, 1.5M, 2M, and 3M — with tooth counts ranging from 15T to 40T, outer diameters span approximately 16.2 mm (0.64 in) for the smallest 1M/15T variant up to 123.7 mm (4.87 in) for the largest 3M/40T variant. Bore diameter and keyway dimensions vary by module; see variant options for exact bore specs.
Typical use cases include right-angle gearbox assemblies for DIY CNC router Z-axis drives, bevel gear sets for robotic arm wrist joints requiring 90-degree torque redirection, and custom mechanical clock or automaton mechanisms where a compact 1:1 bevel gear pair keeps the build tight and precise.
Machined from 45# carbon steel for a reliable combination of surface hardness and core toughness, resisting tooth deformation under sustained torque loads in mechanical drive systems.
Engineered to a precise 90° shaft angle, enabling clean right-angle power transmission without shimming or custom mounting — critical for compact gearbox and robotic joint designs.
Identical tooth counts on both mating gears deliver a 1:1 speed and torque ratio, simplifying drivetrain calculations and making these gears ideal for direction-change applications without speed reduction.
Available in 1M, 1.5M, 2M, and 3M modules with 15T to 40T tooth counts, covering outer diameters from 16.2 mm to 123.7 mm (0.64 in to 4.87 in) to suit a wide range of drive system scales.
CNC-machined tooth profiles maintain consistent pitch and pressure angle across the full tooth count range, reducing vibration and noise during operation in precision mechanical assemblies.
Suited for robotics, CNC machines, DIY gearboxes, automaton mechanisms, and educational engineering projects where a standardized module bevel gear pair is required for right-angle torque transfer.
| Material | 45# Carbon Steel |
|---|---|
| Module Options | 1M, 1.5M, 2M, 3M |
| Tooth Count Range | 15T – 40T |
| Gear Ratio | 1:1 |
| Meshing Angle | 90° |
| Outer Diameter Range | 16.2 mm – 123.7 mm (0.64 in – 4.87 in) |
| Bore Diameter | See variant options |
| Keyway | See variant options |
| Surface Finish | See variant options |
| Tooth Profile | Straight bevel, standard module |
| Application | Right-angle drive, robotics, CNC, gearbox |
| Sold As | Single gear (order two for a mating pair) |
Module size determines the scale of the gear tooth. Larger modules (2M, 3M) handle higher torque loads and suit larger shafts, while smaller modules (1M, 1.5M) are better for compact, lightweight mechanisms. Match the module to your shaft diameter and the torque requirements of your drive system. Both mating gears in a pair must share the same module.
Yes. Each listing is for a single gear. For a 1:1 right-angle drive, you need two identical gears (same module and tooth count) — one for each shaft. Select your module and tooth count, then add two units to your cart.
Since this is a 1:1 ratio set, both gears have the same tooth count — the tooth count selection affects the outer diameter and the physical size of the gear pair. Smaller tooth counts (15T–20T) give a more compact assembly; larger counts (30T–40T) provide a larger contact area and smoother operation at higher speeds. Choose based on the available space in your housing and your shaft center distance.
These gears are machined from 45# carbon steel, which offers a tensile strength of approximately 600–800 MPa depending on heat treatment. They are suitable for moderate-duty mechanical drives in robotics, CNC, and DIY machinery. For heavy industrial continuous-duty applications with high shock loads, consult the specific torque rating for your chosen module and tooth count before ordering.
45# carbon steel has moderate corrosion resistance. For indoor or dry environments, the bare steel finish is adequate. If your application involves moisture, humidity, or occasional exposure to liquids, applying a light machine oil or grease to the tooth surfaces will extend service life. For corrosive environments, consider stainless steel alternatives.
Bore diameter varies by module size. Please refer to the variant options or contact us to confirm the exact bore diameter for your selected module and tooth count before ordering. Measure your shaft diameter carefully — a proper fit is essential for accurate gear meshing and to prevent shaft slippage under load.
These gears are designed for a 1:1 ratio, meaning they change the direction of rotation by 90° without altering speed or torque. They are not suitable for speed reduction on their own. If you need a reduction ratio, you would need to combine them with a separate gear stage (spur, helical, or worm) in your gearbox design.
