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When a motion system demands a clean 90-degree direction change without sacrificing torque, most off-the-shelf gears fall short — wrong tooth count, inconsistent mesh, or materials that wear out under load. These 2 Module bevel gears are engineered for engineers, makers, and machine builders who need a dependable 2:1 ratio transmission component they can spec with confidence.
Each gear is machined from 45# medium-carbon steel, offering a solid balance of hardness and machinability. The 2 Module (2M) tooth profile spans 15 to 40 teeth across the range, with outer diameters from 32.5 mm (1.28 in) to 82.5 mm (3.25 in). The 90-degree meshing angle and 2:1 gear ratio are fixed by design, making these a drop-in solution for paired bevel drive assemblies. Available in quantities of 1, 2, or 5 pieces per order.
Typical use cases include CNC axis drives requiring a 90° turn with speed reduction, robotic joint assemblies where compact bevel pairs replace bulky worm gears, and industrial conveyor or agitator systems needing a reliable right-angle 2:1 transmission. Long-tail applications: 2 mod bevel gear pair for DIY CNC router, 45 steel right angle gear set for robotics, 2 module 90 degree bevel gear replacement.
Machined from 45# steel for a reliable combination of surface hardness and core toughness — resists wear under sustained rotational load without becoming brittle.
Standardized 2M tooth geometry ensures consistent mesh quality and interchangeability with other 2 module gears. Tooth count range: 15T to 40T across the product line.
Engineered for true right-angle power transmission. The 90-degree bevel configuration redirects shaft rotation cleanly with minimal backlash when properly aligned.
The fixed 2:1 ratio delivers predictable speed reduction and torque multiplication — ideal for applications where the output shaft must turn at half the input speed.
Outer diameters span 32.5 mm to 82.5 mm (1.28–3.25 in), covering compact desktop CNC builds up to mid-scale industrial drive assemblies.
Order 1, 2, or 5 pieces per variant to match your project scale — whether prototyping a single axis or stocking spares for a production run.
| Module | 2M (2 mm/tooth) |
|---|---|
| Number of Teeth | 15T – 40T (see variant options) |
| Outer Diameter | 32.5 mm – 82.5 mm (1.28 – 3.25 in) |
| Meshing Angle | 90° |
| Gear Ratio | 2:1 |
| Material | 45# Medium-Carbon Steel |
| Surface Finish | See variant options |
| Bore Diameter | See variant options |
| Hub Length | See variant options |
| Pressure Angle | 20° (standard) |
| Quantity per Order | 1 / 2 / 5 pcs (see variant options) |
| Application | Right-angle mechanical power transmission |
For a 2:1 ratio, pair a smaller driver gear with a driven gear that has exactly twice the teeth — for example, a 15T driver with a 30T driven gear, or a 20T driver with a 40T driven gear. Choose the tooth count based on the outer diameter that fits your housing and the torque load your application requires. Larger tooth counts mean larger diameters and higher torque capacity.
These bevel gears are designed with a fixed 2:1 ratio — the driven gear always turns at half the speed of the driver, with double the torque. The ratio is determined by the tooth count pairing and cannot be changed without selecting a different gear combination. If you need a 1:1 or other ratio, please contact us to confirm availability.
45# steel (equivalent to C45 / SAE 1045) offers a tensile strength of approximately 600–800 MPa in the normalized condition, making it suitable for moderate-to-heavy mechanical drives. For high-cycle or high-shock applications, consider whether additional heat treatment or surface hardening is required for your specific load profile.
45# carbon steel has limited inherent corrosion resistance. For outdoor, humid, or washdown environments, we recommend applying a rust-inhibiting coating, grease, or oil film after installation. If corrosion resistance is a primary requirement, contact us to inquire about stainless steel or surface-treated alternatives.
Yes — as long as the mating gear shares the same module (2M), pressure angle (20°), and meshing angle (90°), these gears will mesh correctly. Always verify the bore diameter and shaft fit of both gears before assembly. Mixing gears with different modules or pressure angles will result in improper mesh and accelerated wear.
You can order individual gears or pairs depending on your needs. If you are building a complete 2:1 right-angle drive, you will need both a driver and a driven gear — select the appropriate tooth count for each. The quantity option (1, 2, or 5 pcs) refers to the number of identical gears per order, not a pre-matched pair. Contact us if you need assistance selecting a matched set.
Bore diameter varies by tooth count and outer diameter. Please refer to the variant detail or contact us to confirm the bore size for your selected tooth count before ordering. Providing your shaft diameter will help us confirm compatibility.
