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When your build demands a clean 90° power transfer without slippage or backlash, the wrong gear set becomes a costly bottleneck. Engineers, machinists, and serious DIYers working on gearboxes, rotary tables, and drive assemblies need a bevel gear that holds tolerance under load — not one that wears out after a few hundred cycles.
These Mod 1.5 bevel gears are machined from C45 medium-carbon steel and finished with a hardened black surface treatment for wear resistance. Available in two tooth counts — 20T and 30T — forming a 1:1.5 gear ratio pair. Bore sizes range from 8mm (0.31 in) to 15mm (0.59 in), with an outer diameter typically in the 33–48mm (1.30–1.89 in) range depending on tooth count. Sold individually or in multi-piece sets of up to 5 pcs.
Typical use cases include right-angle gearbox assemblies for CNC router builds, rotary indexing tables requiring a 1:1.5 speed reduction, and custom drive trains in agricultural or workshop automation equipment where a compact bevel gear pair is needed.
Machined from C45 steel for a balance of machinability and tensile strength, suitable for moderate-to-heavy torque applications in mechanical assemblies.
The blackening treatment improves surface hardness and corrosion resistance, extending service life in workshop and light-industrial environments.
The 20-tooth and 30-tooth gears are matched to deliver a precise 1:1.5 speed reduction or increase, ideal for right-angle drive configurations.
Choose from 8mm, 10mm, 12mm, 14mm, or 15mm bore to match your shaft diameter directly — no bushing required for standard shaft sizes.
Order a single gear for a replacement or up to 5 pieces for multi-axis builds or spare inventory — quantity pricing scales accordingly.
Bevel gear geometry enables smooth torque transfer between intersecting shafts at 90°, making these gears a compact solution for direction-change drive systems.
| Module | 1.5 |
|---|---|
| Gear Ratio | 1:1.5 (20T drives 30T) |
| Tooth Count Options | 20 Tooth / 30 Tooth |
| Material | C45 Medium-Carbon Steel |
| Surface Treatment | Hardened Black |
| Bore Size Options | 8mm / 10mm / 12mm / 14mm / 15mm |
| Pressure Angle | 20° |
| Shaft Angle | 90° |
| Outer Diameter (20T) | See variant options |
| Outer Diameter (30T) | See variant options |
| Face Width | See variant options |
| Weight | See variant options |
| Available Quantities | 1 / 2 / 3 / 4 / 5 pcs |
Measure your shaft diameter with a caliper. Available bore sizes are 8mm, 10mm, 12mm, 14mm, and 15mm. Select the bore that matches your shaft exactly — a loose fit will cause runout and vibration, while an undersized bore cannot be installed without machining.
Yes. The 1:1.5 gear ratio is achieved by pairing the 20-tooth (driver) with the 30-tooth (driven) gear. If you only need a replacement for one gear in an existing pair, you can order just the tooth count you need.
C45 steel has a tensile strength typically in the 600–800 MPa range, making these gears suitable for moderate-to-heavy torque in low-to-medium speed applications. For high-speed or shock-load environments, consult your application's torque requirements against the gear's rated capacity.
The hardened black surface treatment provides a degree of corrosion resistance suitable for indoor workshop and light-industrial use. For outdoor or high-humidity environments, periodic lubrication is recommended. These gears are not rated for submersion or highly corrosive chemical exposure.
Module (Mod) is a standardized metric gear specification, so Mod 1.5 gears from different manufacturers are generally interchangeable in terms of tooth profile and pitch. However, always verify the pressure angle (20° standard) and shaft angle (90°) match your existing gear set before installation.
The 20-tooth gear is the smaller driver gear and the 30-tooth is the larger driven gear. When the 20T gear drives the 30T gear, the output shaft rotates at 2/3 the speed of the input shaft (speed reduction). Reversing the driver/driven roles gives a 1.5× speed increase.
If you are building a single right-angle drive, you need at minimum one 20T and one 30T gear (order each separately as 1 pcs). Multi-piece sets (2–5 pcs) are cost-effective for multi-axis machines, production builds, or keeping spares on hand. Per-unit pricing decreases with larger quantity options.
