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When your build demands a clean 90-degree direction change without sacrificing torque or alignment accuracy, a poorly matched gear set becomes the weakest link in your drivetrain. Engineers, machine builders, and serious DIY makers who need repeatable, low-backlash power transmission rely on a properly spec'd miter gear pair — not a generic substitute. This Module 3 bevel gear is designed for exactly that application.
Each gear is machined from C45 medium-carbon steel and treated with a hardened black oxide finish for improved surface hardness and corrosion resistance. The 20-tooth, Module 3 profile delivers a pitch circle diameter of 60 mm (approx. 2.36 in). Bore sizes range from 15 mm to 28 mm (0.59–1.10 in), each paired with a precision-cut keyway (5 mm, 6 mm, or 8 mm depending on bore) for positive shaft engagement. Sold individually or as a matched 1:1 pair.
Typical use cases include right-angle gearbox assemblies for CNC router axis drives, custom conveyor direction changes requiring a compact 90° miter gear module 3 setup, and industrial automation rigs where a C45 steel bevel gear with keyway bore ensures consistent shaft-to-gear coupling under cyclic load.
Machined from C45 steel for a balanced combination of machinability, tensile strength (typically 580–700 MPa), and wear resistance — suited for moderate-to-heavy duty drivetrain applications.
The black oxide surface treatment improves micro-hardness, reduces friction during run-in, and provides a baseline layer of corrosion inhibition in dry or lightly oiled environments.
Module 3 tooth geometry yields a 60 mm pitch circle diameter with a tooth pitch of ~9.42 mm, enabling smooth meshing at 90° with a matched miter gear and minimal backlash when properly mounted.
Nine bore sizes from 15 mm to 28 mm, each with a matched keyway (5 mm, 6 mm, or 8 mm) for positive, slip-free shaft coupling. Select the bore that matches your shaft diameter exactly.
Identical tooth count on both gears ensures a 1:1 speed and torque ratio at a precise 90-degree shaft angle — ideal for direction-change applications where output speed must equal input speed.
Available as 1 pc (single gear) or 2 pcs (matched miter pair). Order 2 pcs to receive a complete, pre-matched 90° bevel gear set ready for direct installation.
| Gear Type | Bevel Gear (Miter Gear) |
|---|---|
| Module | 3 |
| Number of Teeth | 20 |
| Shaft Angle | 90° |
| Gear Ratio | 1:1 |
| Pitch Circle Diameter | 60 mm (2.36 in) |
| Material | C45 Medium-Carbon Steel |
| Surface Treatment | Hardened Black Oxide |
| Bore Size Range | 15 mm – 28 mm (0.59–1.10 in) |
| Keyway Width | 5 mm (15–17 mm bore) / 6 mm (18–22 mm bore) / 8 mm (24–28 mm bore) |
| Pressure Angle | See variant options |
| Face Width | See variant options |
Measure your shaft diameter with a caliper. Select the bore size that matches your shaft exactly — for example, if your shaft is 20 mm in diameter, choose the "20mm + 6mm Keyway" option. The keyway width is fixed per bore size, so also confirm your shaft has a matching keyway slot cut to the correct width (5 mm, 6 mm, or 8 mm depending on bore).
Yes — a miter gear drive requires two identical gears meshing at 90°. Select the "2 pcs" quantity option to receive a matched pair. Both gears share the same Module 3, 20-tooth specification, ensuring a true 1:1 ratio. If you already have one gear, you can order a single piece ("1 pcs") as a replacement.
C45 steel has a typical tensile strength of 580–700 MPa and yield strength of approximately 305–450 MPa. Actual load capacity depends on operating speed (RPM), lubrication, mounting accuracy, and duty cycle. For precise torque ratings, consult a mechanical engineer using the gear's pitch circle diameter (60 mm) and face width as inputs to standard gear strength calculations (e.g., AGMA or ISO 6336).
Black oxide provides a baseline level of corrosion inhibition and is suitable for dry or lightly oiled indoor environments. For applications exposed to moisture, coolant, or outdoor conditions, we recommend applying a light coat of gear oil or anti-rust grease to the tooth surfaces and bore after installation to extend service life.
Module 3 is a standardized metric gear specification, so this gear is designed to be dimensionally compatible with other Module 3, 20-tooth bevel gears that share the same pressure angle. However, minor manufacturing tolerances can affect backlash. For critical applications, test-fit before final assembly and verify the pressure angle matches your existing gear.
For moderate-speed applications, an ISO VG 220 gear oil or a lithium-based grease applied to the tooth contact surfaces is suitable. For high-speed or continuous-duty use, consult a lubrication engineer. Avoid dry running — even a thin film of lubricant significantly extends tooth life and reduces operating temperature.
Yes. Bevel gears can operate in any shaft orientation — horizontal, vertical, or angled — provided the housing or bearing arrangement adequately supports the axial (thrust) loads generated by the bevel tooth geometry. Ensure your bearing selection accounts for both radial and axial load components when mounting in a vertical configuration.
