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When your motion-control build demands reliable torque transfer at an angle, a mismatched or worn bevel gear becomes the weakest link in the entire drivetrain. Engineers, makers, and small-batch manufacturers working on CNC routers, robotic arms, conveyor systems, and motorized fixtures need a gear that holds tight tolerances run after run — without backlash creep or premature wear.
These 1 Module (1M) steel helical bevel gears are machined from carbon steel with a smooth helical tooth profile. The tooth count spans 15T to 40T, with corresponding outer diameters ranging from approximately 16.2 mm (0.638 in) for the 15T up to 41.2 mm (1.622 in) for the 40T. Each gear features a standard 1M pitch, making cross-sourcing and replacement straightforward.
Typical use cases include right-angle power transmission in desktop CNC spindle heads, bevel gear pairs in DIY 3D-printer extruder gearboxes, and angular drive stages in automated camera sliders or pick-and-place machines — anywhere a compact, steel helical bevel gear for motor shaft is required.
| Module | 1M (Metric Module 1) |
|---|---|
| Tooth Count Options | 15T, 16T, 18T, 20T, 22T, 24T, 25T, 30T, 35T, 40T |
| Outer Diameter Range | 16.2 mm – 41.2 mm (0.638 in – 1.622 in) |
| Tooth Type | Helical (umbrella tooth / bevel) |
| Material | Carbon Steel |
| Shaft Bore Diameter | See variant options |
| Pressure Angle | See variant options |
| Pitch Angle | 45° (standard bevel pair) |
| Surface Finish | See variant options |
| Pack Quantity | 1 pcs / 4 pcs / 8 pcs / 10 pcs |
| Application | CNC, robotics, motor drives, automation |
Select the tooth count based on your required gear ratio and available space. For a 1:1 right-angle drive, pair two gears of the same tooth count (e.g., 20T × 20T). For a speed or torque reduction, pair different counts — for example, a 15T driving a 30T gives a 2:1 reduction. Check the outer diameter against your housing clearance before ordering.
Bore diameter varies by tooth count and is listed in the variant detail. Please check the variant options or contact us to confirm the bore size matches your motor or shaft diameter before purchasing.
Yes. The carbon steel construction provides solid load-bearing capacity for typical small-motor and servo applications found in CNC routers, robotic joints, and automation fixtures. For very high-torque or high-RPM industrial drives, verify the rated torque against your system requirements.
Carbon steel offers good mechanical strength but has moderate corrosion resistance. For environments with moisture or mild chemicals, apply a light machine oil or grease to the tooth surfaces. For highly corrosive environments, consider stainless steel alternatives.
Yes — as long as both gears share the same module (1M) and the pitch angle is compatible (standard 45° bevel pair). A 15T/40T pairing gives approximately a 2.67:1 ratio. Confirm center distance and housing geometry accommodate the size difference between the two gears.
Helical bevel gears have angled (spiral) teeth that engage gradually across the tooth face, resulting in smoother, quieter operation and higher load capacity compared to straight bevel gears. They are preferred in applications where noise reduction and smooth torque delivery matter, such as precision CNC axes and robotic joints.
A standard right-angle bevel gear drive requires two gears — one on each intersecting shaft. Order at least 2 pieces (or a 4-pack for spares). If you are building multiple axes or want backup gears on hand, the 8-pack or 10-pack options offer better per-unit value.
