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When your drivetrain demands a reliable 90-degree power turn without slippage or backlash creep, a mismatched or undersized bevel gear pair becomes the weakest link in the entire system. Makers, robotics engineers, and CNC builders who need a repeatable 2:1 speed reduction at a right-angle junction will find this straight bevel gear set engineered to hold up under real load cycles.
Each set consists of a matched pinion and wheel pair machined from 45# medium-carbon steel — a material known for its balance of tensile strength and machinability. The gear pairs are available in module sizes of 1, 1.5, 2, 2.5, and 3 Mod, with tooth counts ranging from 15T+30T up to 20T+40T depending on the selected variant. Bore diameter and hub dimensions vary by module; refer to variant options for exact measurements.
Typical applications include DIY gearbox builds requiring a 2:1 reduction stage, robotic arm joints needing a compact 90-degree torque transfer, CNC axis drives where a right-angle bevel stage replaces a worm gear for higher efficiency, and small-scale industrial automation prototypes where shaft intersection at 90° is a layout constraint.
Pinion and wheel are machined and paired at the factory to deliver a consistent 2:1 speed reduction, eliminating the guesswork of sourcing and matching individual gears.
45# steel offers a tensile strength of approximately 600–800 MPa, making these gears suitable for moderate-to-heavy torque loads in both continuous and intermittent duty cycles.
Available in 1, 1.5, 2, 2.5, and 3 Mod to match your existing gear train pitch. Larger modules handle higher torque; smaller modules suit compact, high-speed layouts.
Straight bevel tooth profile is cut for a precise 90-degree shaft angle, enabling right-angle power transmission without the efficiency losses associated with worm gear drives.
Choose from 15T+30T, 16T+32T, 18T+36T, or 20T+40T combinations to balance pitch line velocity, torque capacity, and physical envelope for your specific application.
Each order includes one pinion and one wheel, pre-matched for correct tooth engagement. No additional pairing or lapping required before installation.
| Gear Type | Straight Bevel Gear |
|---|---|
| Ratio | 2:1 |
| Shaft Angle | 90° |
| Material | 45# Medium-Carbon Steel |
| Module (Mod) | 1 / 1.5 / 2 / 2.5 / 3 (see variant options) |
| Tooth Count (Pinion + Wheel) | 15T+30T / 16T+32T / 18T+36T / 20T+40T (see variant options) |
| Pressure Angle | 20° (standard straight bevel) |
| Bore Diameter | See variant options |
| Hub Length | See variant options |
| Surface Finish | Natural steel (uncoated) |
| Pack Contents | 1 Matched Pair (1 Pinion + 1 Wheel) |
| Applicable Standard | GB/T (metric module) |
Module (Mod) determines the tooth size and pitch. A larger module (e.g., 3 Mod) means bigger teeth that can handle more torque but require more space. A smaller module (e.g., 1 Mod) suits compact, higher-speed applications with lower torque. Match the module to your existing gear train or calculate based on the torque and speed requirements of your drive system.
All combinations maintain the 2:1 ratio — the difference lies in physical size and pitch line velocity. A 15T+30T pair is more compact; a 20T+40T pair distributes load across more teeth, which can reduce wear under sustained load. Choose based on your available envelope and duty cycle.
45# steel has a typical tensile strength of 600–800 MPa and yield strength of approximately 355 MPa. Actual load capacity depends on module size, tooth count, operating speed, lubrication, and duty cycle. For high-cycle or shock-load applications, consider adding a lubricant and verifying the calculated tangential force against the gear's rated capacity for the selected module.
45# steel is not inherently corrosion-resistant. For outdoor or humid environments, apply a light machine oil or grease to the tooth surfaces and bore. If long-term corrosion resistance is required, consider applying a zinc or black oxide coating after installation, or contact us to discuss alternative material options.
No — straight bevel gears must be paired with a matching straight bevel gear of the same module and pressure angle. They are not interchangeable with helical bevel, spiral bevel, or worm gears. The pinion and wheel in each set are factory-matched and should always be used together.
Bore diameter varies by module and tooth count. Please refer to the variant options on this page or contact us with your selected variant (e.g., "2 Mod 18T+36T") and we will confirm the exact bore diameter and hub length before you order.
Standard installation requires a shaft with the correct diameter to match the bore, a keyway or set screw arrangement for shaft retention (depending on your hub design), and a suitable gear housing or bearing support to maintain the 90° shaft alignment. No special tooling beyond common workshop equipment is needed for assembly.
