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When your drivetrain needs to change direction without losing torque, a mismatched or low-tolerance bevel gear becomes the weakest link in your build. Whether you're designing a CNC axis, a robotic joint, or a custom gearbox, these 3 Module 1:1 ratio bevel gears give you the dimensional accuracy and material integrity to transmit power cleanly at 90°.
Each gear is machined to a Module 3 standard with a 1:1 ratio pairing (20T or 30T), available in bore diameters ranging from 14 mm (0.55 in) to 50 mm (1.97 in). The tooth profile follows standard involute geometry for smooth meshing engagement. Material is steel alloy, finished to a consistent surface for reliable contact under load.
Typical applications include right-angle gearbox assemblies for CNC router Z-axis drives, bevel gear sets for robotic arm joints requiring 90° torque redirection, and custom mechanical transmission systems in industrial automation and maker projects requiring precise 1:1 speed ratio bevel gear pairing.
Standard Module 3 geometry ensures accurate tooth engagement and interchangeability with other M3 bevel gear components in your drivetrain.
Matched 20T×20T or 30T×30T pairing delivers a precise 1:1 transmission ratio, redirecting torque 90° without altering rotational speed.
Available in 14 bore size options from 14 mm to 50 mm (0.55"–1.97") to fit a broad range of shaft diameters across hobby and industrial applications.
Machined from steel alloy for the load-bearing strength and wear resistance needed in continuous-duty mechanical transmission applications.
Choose 20T for compact, lighter-duty assemblies or 30T for larger pitch diameter and higher torque capacity — both maintain the 1:1 ratio when paired correctly.
Each unit is sold as a single gear. Order two matching tooth-count gears with your required bore sizes to complete a functional 90° bevel gear pair.
| Module | 3 |
|---|---|
| Gear Ratio | 1:1 |
| Tooth Count Options | 20T / 30T |
| Pressure Angle | 20° (standard involute) |
| Bore Diameter Range | 14 mm – 50 mm (0.55" – 1.97") |
| Pitch Cone Angle | 45° (1:1 ratio) |
| Material | Steel Alloy |
| Surface Finish | See variant options |
| Shaft Fit | Straight bore (keyway: See variant options) |
| Tooth Form | Straight bevel (involute) |
| Quantity per Order | 1 pc |
| Weight | See variant options |
Measure your shaft's outer diameter precisely with calipers. Select the bore size that matches your shaft OD. If you need a keyway or set-screw hole, that machining is typically done separately after receiving the gear. When in doubt between two sizes, choose the smaller bore — it can be bored out, but cannot be reduced.
Both maintain a 1:1 ratio when paired with an identical tooth-count gear. The 20T gear has a smaller pitch diameter (~60 mm) making it suited for compact assemblies with moderate torque. The 30T gear has a larger pitch diameter (~90 mm), offering greater torque capacity and smoother engagement at the cost of a larger footprint. Both must be paired with the same tooth count to maintain the 1:1 ratio.
No. Mixing a 20T with a 30T bevel gear of the same module will result in a 2:3 ratio, not 1:1, and the pitch cone angles will not match correctly for a 90° mesh. For a true 1:1 right-angle drive, always pair two gears with the same tooth count (20T×20T or 30T×30T).
These gears are machined from steel alloy without a specified corrosion-resistant coating. For outdoor, humid, or washdown environments, we recommend applying a suitable gear lubricant or anti-corrosion treatment after installation. If your application requires stainless steel or coated variants, please contact us to confirm availability.
These gears are well-suited for CNC machine right-angle axis drives, robotic arm joints, custom gearbox assemblies, agricultural equipment, and general mechanical power transmission where a 90° direction change at a 1:1 ratio is required. The Module 3 standard makes them compatible with a wide range of off-the-shelf mechanical components.
Yes. Each listing is for a single gear. To create a functional 90° bevel gear drive, you need two gears of the same tooth count (e.g., two 20T gears or two 30T gears) with bore diameters matched to your respective shafts. Add two units to your cart, selecting the appropriate bore size for each shaft.
For most applications, a medium-viscosity gear oil (ISO VG 220) or a lithium-based grease applied to the tooth contact faces is recommended. Ensure the gear housing retains lubricant at the mesh point. Re-lubricate periodically based on operating load and duty cycle.
