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When your project demands a reliable 90-degree power transfer without backlash headaches, finding a matched bevel gear pair in the right module and bore can be a real bottleneck. These brass bevel gear sets are designed for makers, robotics builders, and mechanical engineers who need a dimensionally accurate, ready-to-install 1:1 miter gear pair without custom machining.
Each set consists of two matched bevel gears machined from solid brass, offering a smooth tooth profile and consistent pitch accuracy. Available in four module sizes — Mod 0.5, Mod 0.8, Mod 1, and Mod 1.5 — with tooth counts of 15, 20, 25, or 30 teeth depending on the module. Bore diameters range from 3 mm (approx. 0.12 in) up to 15 mm (approx. 0.59 in), with select variants featuring a 4 mm keyway slot for positive shaft locking. Gear outer diameters range approximately 7.5 mm to 45 mm (0.30–1.77 in) depending on module and tooth count.
Typical use cases include 90-degree shaft direction changes in small CNC router builds, robotic arm joint drives requiring compact miter gear pairs, and custom DIY gearbox assemblies where a brass bevel gear set with keyway bore provides secure torque transmission without set-screw slip.
Machined from solid brass for good corrosion resistance, low friction meshing, and reliable performance in light-to-medium load drivetrain applications.
Choose from Mod 0.5, 0.8, 1, or 1.5 to match your gear pitch requirements. Wider module selection means fewer compromises when designing your drivetrain.
Each set contains two identical bevel gears with the same tooth count, delivering a precise 1:1 speed and torque ratio for 90-degree shaft intersections.
Select variants include a 4 mm keyway slot (on 8 mm, 10 mm, and 12 mm bore sizes) for positive shaft engagement — eliminating set-screw slip under load.
Bore options span 3 mm to 15 mm to fit common motor shafts, hobby servo shafts, and standard metric rod stock used in CNC and robotics builds.
Available in 15, 20, 25, or 30 teeth (tooth count availability varies by module), giving you flexibility to balance gear size, speed, and torque in compact assemblies.
| Product Type | Bevel Gear Set (Miter Gear Pair, 1:1 Ratio) |
|---|---|
| Material | Brass |
| Gear Ratio | 1:1 |
| Module (Pitch) | Mod 0.5 / Mod 0.8 / Mod 1 / Mod 1.5 (see variant options) |
| Tooth Count | 15 / 20 / 25 / 30 teeth (availability varies by module — see variant options) |
| Bore Diameter | 3 mm / 4 mm / 5 mm / 6 mm / 8 mm / 10 mm / 12 mm / 14 mm / 15 mm (see variant options) |
| Keyway Options | 8 mm + 3 mm keyway / 10 mm + 4 mm keyway / 12 mm + 4 mm keyway (select variants) |
| Shaft Angle | 90° |
| Outer Diameter (approx.) | See variant options |
| Pressure Angle | See variant options |
| Quantity per Set | 2 gears (matched pair) |
| Finish | Natural brass (uncoated) |
The module (Mod) defines the tooth size and pitch of the gear. Smaller modules like Mod 0.5 and Mod 0.8 are suited for compact, low-torque applications such as small robotics or instrument drives. Mod 1 and Mod 1.5 handle higher torque and are common in light CNC and mechanical automation builds. Both gears in a meshing pair must share the same module — mixing modules will result in incorrect meshing and rapid wear.
Select a bore diameter that matches your shaft diameter exactly. Common motor shaft sizes include 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, and 10 mm. If your shaft is metric and falls within our listed bore range, choose the matching size. For shafts requiring a positive lock, choose a keyway variant (available in 8 mm, 10 mm, and 12 mm bore sizes with a 4 mm keyway slot).
For light-duty or intermittent-load applications, a standard bore with a set screw is typically sufficient. For continuous-duty or higher-torque applications — such as CNC axis drives or robotic joints under load — a keyway bore provides a more secure mechanical connection and prevents rotational slip. If your shaft already has a keyway machined into it, select the matching keyway bore variant.
Each listing is for a matched set of two bevel gears with the same module and tooth count, forming a complete 1:1 miter gear pair. You do not need to purchase gears separately — both gears in the set are included and are dimensionally matched for correct meshing.
Brass offers good resistance to atmospheric corrosion and mild moisture exposure, making it suitable for indoor mechanical assemblies, robotics, and light automation. It is not recommended for prolonged submersion or highly acidic/alkaline environments. For outdoor or wet environments, consider whether a coated or stainless alternative would better suit your needs.
Yes. Mod 1 and Mod 1.5 bevel gear sets are commonly used in CNC router axis drives and extruder gearboxes where a 90-degree direction change is needed. Mod 0.5 and Mod 0.8 sets are better suited for compact 3D printer or instrument-level mechanisms. Confirm the bore size matches your motor or lead screw shaft before ordering.
Within the same module, a higher tooth count results in a larger gear outer diameter and a smoother, quieter mesh due to more teeth in contact. A 30-tooth gear will be physically larger than a 20-tooth gear of the same module. Since the ratio is always 1:1 (both gears have the same tooth count), the choice affects gear size and available bore options rather than speed or torque ratio.
