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When a right-angle power transfer is the only option and slippage is not, hobbyists and mechanical engineers alike need a bevel gear they can count on. Whether you are building a custom CNC axis, a robotics drivetrain, or a hand-cranked mechanical assembly, mismatched or soft gears cause backlash, wear, and costly downtime. These 45# carbon steel bevel gears are machined to deliver consistent mesh engagement across every tooth, every time.
Each gear is precision-cut from 45# medium-carbon steel, offering a balance of hardness and machinability suited to moderate-to-heavy transmission loads. Available in three modulus values — 1 Mod, 1.5 Mod, and 2 Mod — with tooth counts ranging from 15 to 20 teeth, the pitch diameter spans approximately 15 mm (0.59 in) to 40 mm (1.57 in) depending on the selected combination. The 90° bevel angle enables direct perpendicular shaft coupling without additional gearbox housings.
Typical use cases include DIY right-angle gearbox builds for workshop machinery, bevel gear pairs in RC vehicle differentials and steering assemblies, and custom power-transmission stages in maker and automation projects requiring compact 90° direction changes.
Machined from 45# medium-carbon steel for reliable strength under rotational load, with good wear resistance across repeated engagement cycles.
Engineered for perpendicular shaft coupling, enabling compact right-angle power transmission without additional housing or adapter components.
Choose the modulus that matches your mating gear and load requirements. Larger modulus = larger tooth profile = higher torque capacity.
Five tooth-count options per modulus allow fine-tuning of gear ratio and pitch diameter to suit your specific transmission design.
Consistent tooth geometry across the full face width ensures smooth mesh engagement, reduced vibration, and predictable backlash characteristics.
Suitable for robotics, CNC builds, RC differentials, workshop machinery, and any custom mechanical assembly requiring a reliable 90° bevel gear stage.
| Material | 45# Carbon Steel |
|---|---|
| Bevel Angle | 90° |
| Modulus (Mod) | 1 / 1.5 / 2 (see variant options) |
| Number of Teeth | 15 / 16 / 18 / 19 / 20 (see variant options) |
| Pitch Diameter | See variant options |
| Bore Diameter | See variant options |
| Face Width | See variant options |
| Surface Finish | Natural steel (uncoated) |
| Quantity per Pack | 1 Pcs |
| Application | Right-angle power transmission, DIY gearboxes, robotics, CNC |
Modulus (Mod) defines the tooth size and determines which gears can mesh together — only gears of the same Mod will pair correctly. Choose a higher Mod (e.g., 2 Mod) for heavier loads and lower RPM applications, and a lower Mod (e.g., 1 Mod) for lighter loads and more compact assemblies. Always match the Mod of both the drive and driven gear.
Yes. Bevel gears of the same Modulus can be paired regardless of tooth count, and mixing tooth counts creates a gear ratio. A 15T/20T pair produces a 1:1.33 ratio, which changes output speed and torque proportionally. Ensure both gears share the same Mod and 90° bevel angle for correct mesh.
Bore diameter varies by Modulus and tooth count combination. Please refer to the variant options or contact us to confirm the bore size for your selected variant before ordering, especially if you need a specific shaft fit.
These gears are machined from 45# carbon steel with a natural (uncoated) finish, which provides good mechanical strength but limited corrosion resistance in humid or wet environments. For outdoor or high-moisture applications, consider applying a light machine oil or grease coating after installation to protect the tooth surfaces.
Load capacity depends on the Modulus, tooth count, shaft speed, and lubrication conditions. As a general guide, larger Mod gears (2 Mod) handle higher torque than smaller Mod gears (1 Mod) at equivalent speeds. For precise load ratings, contact us with your application details and we can advise on suitability.
Each listing is sold as 1 piece (1 Pcs). For a functional 90° bevel gear stage you will need at least two gears — a drive gear and a driven gear — both of the same Modulus. Add the required quantity to your cart based on your assembly needs.
Yes. These bevel gears are well-suited for DIY CNC axis direction changes, router head assemblies, and similar maker-grade CNC applications where a compact 90° transmission is needed. For production CNC environments with continuous high-cycle loads, verify the specific Mod and tooth count against your torque and speed requirements.
