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When a shaft direction change is non-negotiable and slippage is not an option, engineers and serious DIYers reach for a properly rated bevel gear set. This Mod 2 bevel gear pair is designed for builders who need a dependable 1:3 speed-reduction or torque-multiplication drive in a compact right-angle configuration — without the guesswork of undersized or poorly finished gears.
Each gear is machined from C45 medium-carbon steel and finished with a hardened black oxide coating for corrosion resistance and surface durability. The set consists of a 15-tooth pinion gear and a 45-tooth wheel gear, both cut to Module 2 (Mod 2) standard. Bore sizes range from 10 mm (0.39 in) up to 25 mm (0.98 in), with keyway options available from 4 mm to 8 mm depending on bore diameter — select your exact combination from the variant options above.
Typical use cases include right-angle gearbox assemblies for CNC router Z-axis drives, custom lathe or milling attachments requiring 1:3 reduction, agricultural equipment PTO adapters, and hobbyist robotics or automation rigs where a bevel gear pair for right-angle torque transfer is required. The hardened black finish also makes these gears a practical choice for open-drive applications where light corrosion protection matters.
Machined from C45 medium-carbon steel for a balance of machinability, toughness, and load-bearing strength — suitable for moderate-to-high torque right-angle drives.
Surface-hardened with a black oxide treatment that reduces friction, resists light corrosion, and extends service life in open or semi-enclosed drive environments.
Delivers a precise 1:3 speed reduction or 3:1 torque multiplication — ideal for applications where the input shaft spins faster than the output shaft needs to.
Bore sizes from 10 mm to 25 mm, with keyway slots (4 mm, 5 mm, 6 mm, or 8 mm) available on larger bores for positive shaft engagement and zero rotational slip.
Order a single gear for replacement or a matched pair for a complete bevel gear drive assembly — both options available per variant selection.
Cut to Mod 2 standard for interchangeability with other Mod 2 bevel gears. Consistent tooth geometry ensures smooth mesh and predictable load distribution across the gear face.
| Module | 2 (Mod 2) |
|---|---|
| Gear Ratio | 1:3 |
| Pinion Tooth Count | 15 Tooth |
| Wheel Tooth Count | 45 Tooth |
| Material | C45 Medium-Carbon Steel |
| Surface Treatment | Hardened Black Oxide |
| Pressure Angle | 20° |
| Bore Diameter | See variant options (10 mm – 25 mm) |
| Keyway | See variant options (4 mm / 5 mm / 6 mm / 8 mm, bore-dependent) |
| Drive Angle | 90° (right-angle bevel) |
| Available Quantity | 1 pcs or 2 pcs (see variant options) |
| Weight | See variant options |
This listing includes both gears as a matched 1:3 ratio set. The 15-tooth gear is the pinion (input/driver) and the 45-tooth gear is the wheel (output/driven). If you need only one for replacement, select the appropriate model from the variant dropdown. For a complete right-angle drive assembly, order the 2-pcs option to receive both gears.
Measure your shaft diameter precisely with a caliper. Select the bore size that matches your shaft — a bore that is too large will cause runout and vibration. For shafts requiring positive locking, choose a bore + keyway variant (e.g., 14mm + 5mm Keyway) and use a matching key and set screw for a secure fit.
C45 steel bevel gears are rated for moderate-to-high torque applications in machinery, automation, and industrial equipment. For exact load ratings, calculate based on the Mod 2 tooth geometry and your operating RPM. If your application involves shock loads or continuous high-speed operation, consider adding lubrication and an enclosed housing for best service life.
The hardened black oxide finish provides light corrosion resistance suitable for indoor or semi-protected environments. For outdoor or high-humidity applications, periodic lubrication with a gear grease or oil is recommended to maintain the surface and extend gear life.
Yes — as long as the mating gear is also Module 2 with a matching pressure angle (20°) and compatible tooth count for your desired ratio. Module 2 is a standardized tooth profile, so these gears are interchangeable with other Mod 2 bevel gears from any manufacturer following the same standard.
Yes. Bore-only variants (e.g., 10mm, 12mm, 14mm, 15mm) are available for applications where a set screw or interference fit is used instead of a key. If your shaft has a keyway machined in, select the matching bore + keyway variant for a positive, slip-free connection.
Selecting "1 pcs" gives you a single gear of the model you choose (either the 15T pinion or the 45T wheel). Selecting "2 pcs" gives you two gears of the same model — useful if you need spares or are building a symmetric drive with two identical stages. For a complete mating pair (one pinion + one wheel), add both models to your cart individually, or contact us to confirm bundle availability.
