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When your project demands reliable right-angle power transmission and you can't afford slop, backlash, or premature wear, the right bevel gear makes all the difference. These 45-degree bevel gears are designed for hobbyists, robotics builders, CNC enthusiasts, and mechanical engineers who need a matched, hardened drivetrain component they can trust across repeated load cycles.
Each gear is machined from carbon steel and hardened for wear resistance. Available in module sizes 1, 1.5, 2, 2.5, 3, 4, and 5, with tooth counts ranging from 15T to 40T (approximately 0.59 in to 1.57 in pitch diameter for Mod 1; scales proportionally by module). Paired 1:2 ratio sets (e.g., 15+30T, 16+32T, 18+36T, 20+40T) are also available for direct speed reduction applications.
Typical use cases include right-angle gearbox assemblies for DIY CNC routers, robotic arm joints requiring a 1:2 speed reduction, and custom mechanical drive systems in automation prototypes where a compact 45° bevel mesh is needed instead of a worm or helical stage.
The 45-degree pressure angle enables clean 90° shaft intersections, making these gears ideal for compact right-angle drive configurations without additional shafting or universal joints.
Each gear is manufactured from carbon steel and hardened to resist surface fatigue, pitting, and wear — extending service life under repeated mechanical loading compared to unhardened alternatives.
Seven module sizes (1, 1.5, 2, 2.5, 3, 4, 5) let you match the gear to your torque and space requirements. Larger modules handle higher torque; smaller modules suit compact, low-load mechanisms.
With tooth counts from 15 to 40 (and select options up to 40T), you can fine-tune your gear ratio and pitch diameter to fit your shaft spacing and speed requirements precisely.
Select paired sets (15+30T, 16+32T, 18+36T, 20+40T) in Mod 1.5, 2, 2.5, and 3 for a guaranteed 2:1 speed reduction out of the box — no separate matching required.
All gears conform to the metric module (Mod) standard, ensuring straightforward replacement sourcing and compatibility with other metric-standard gears in your drivetrain.
| Gear Type | Bevel Gear, 45° Pressure Angle |
|---|---|
| Material | Carbon Steel (Hardened) |
| Module Range | Mod 1, 1.5, 2, 2.5, 3, 4, 5 |
| Tooth Count Range | 15T – 40T (single); 15+30T to 20+40T (pairs) |
| Bevel Angle | 45° |
| Bore Diameter | See variant options |
| Hub Diameter | See variant options |
| Face Width | See variant options |
| Surface Treatment | Hardened |
| Gear Standard | Metric Module (ISO) |
| Shaft Orientation | 90° (right-angle) |
| Weight | See variant options |
Module size determines the tooth size and load capacity. Smaller modules (Mod 1–1.5) suit lightweight, low-torque mechanisms such as small robots or instruments. Mid-range modules (Mod 2–3) are appropriate for moderate-torque applications like CNC axis drives or automation prototypes. Larger modules (Mod 4–5) handle higher torque loads in heavier machinery. As a rule, match the module to your torque requirement and available shaft spacing.
No. Bevel gears must be the same module to mesh correctly. Mixing modules results in incorrect tooth engagement, accelerated wear, and potential gear failure. Always confirm both gears in a mating pair share the same module value before assembly.
These gears are machined from hardened carbon steel, which provides significantly better surface fatigue resistance and wear life compared to mild steel or plastic alternatives. Exact load ratings depend on module, tooth count, shaft speed, and lubrication conditions. For critical load calculations, refer to standard gear design references (e.g., AGMA or ISO 10300) using the module and material data provided.
Carbon steel has moderate corrosion resistance. For indoor or dry environments, the hardened surface provides adequate protection under normal use. For humid, wet, or outdoor environments, we recommend applying a light machine oil or grease coating and storing gears in a dry location when not in use. If corrosion resistance is a primary requirement, consider stainless steel alternatives.
Bore diameter varies by module and tooth count. Please check the variant detail or contact us to confirm the bore size for your selected module and tooth count before ordering. Ensure the bore matches your shaft diameter, or plan for a keyway or set-screw modification as needed.
Single gears (e.g., 15T, 20T) are sold individually and are suitable when you already have a mating gear or need to replace one gear in an existing pair. Paired sets (e.g., 15+30T, 16+32T) include both the pinion and the gear pre-matched at a 1:2 tooth ratio, delivering a 2:1 speed reduction. Paired sets save time and ensure correct module matching right out of the box.
Yes, lubrication is recommended for all metal gear meshes to reduce friction, heat, and wear. A light gear oil or lithium-based grease applied to the tooth contact surfaces is suitable for most hobby and light industrial applications. Re-lubricate periodically based on operating hours and load conditions.
