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When a right-angle power transfer fails mid-project, the entire drivetrain stalls. Engineers, machinists, and serious DIY builders working on CNC machines, robotics, conveyor systems, and custom gearboxes need bevel gears they can rely on — parts that mesh cleanly, hold tolerance under load, and arrive ready to install. These Bevel Gear Mod 3/4/5 transmission gears are designed exactly for that use case.
Each gear is machined from solid metal (steel alloy) and available across three module sizes — Mod 3, Mod 4, and Mod 5 — with tooth counts ranging from 15T to 40T (approximately 0.59 in to 1.57 in pitch diameter reference range depending on module). The 90° 1:1 pairing configuration means each gear is designed to mesh directly with its matching counterpart for straight angular transmission without ratio change. Bore diameter and keyway dimensions vary by module and tooth count; see variant options for exact bore specs.
Typical applications include right-angle drive shafts in CNC router builds, bevel gear sets for robotic joint articulation, 90-degree power transmission in custom agricultural or industrial machinery, and replacement gearing in light-duty gearboxes requiring Mod 3 bevel gears or Mod 5 bevel gear pairs.
Available in Mod 3, Mod 4, and Mod 5 — covering a wide range of torque and speed requirements for light to medium industrial drives.
15T through 40T options let you match the gear to your shaft spacing and load requirements without custom machining.
Each gear is cut for direct right-angle meshing with its matched counterpart, delivering clean angular transmission with no ratio offset.
Machined from steel alloy for durability under rotational load — resists wear and deformation in continuous-duty applications.
Order 1, 2, or 3 pieces per transaction — ideal whether you need a single replacement or a matched pair plus a spare.
Suited for CNC machines, robotics, conveyor drives, custom gearboxes, and light industrial machinery requiring reliable right-angle power transfer.
| Gear Type | Straight Bevel Gear |
|---|---|
| Module Options | Mod 3 / Mod 4 / Mod 5 |
| Tooth Count Range | 15T – 40T |
| Pressure Angle | 20° (standard) |
| Shaft Angle | 90° |
| Gear Ratio | 1:1 |
| Material | Steel Alloy |
| Finish | See variant options |
| Bore Diameter | See variant options |
| Outer Diameter | See variant options |
| Face Width | See variant options |
| Pack Quantity | 1 / 2 / 3 pcs (selectable) |
The module number defines the tooth size and pitch. Mod 3 gears have smaller teeth and suit lighter loads or tighter shaft spacing. Mod 4 is a mid-range choice for moderate torque. Mod 5 has larger teeth and handles heavier loads. Both mating gears must share the same module — you cannot mesh a Mod 3 with a Mod 4 or Mod 5.
Yes. A 1:1 bevel gear set requires two matching gears — same module, same tooth count — mounted at 90° to each other. You can select a pack quantity of 2 directly from the variant options, which gives you one matched pair. If you need a spare, choose quantity 3.
For a 1:1 ratio drive, both gears must have the same tooth count. Choose a tooth count that fits your shaft center distance and available space. Lower tooth counts (15T–20T) result in smaller overall gear diameter; higher counts (30T–40T) produce larger gears that distribute load across more teeth, which can reduce wear in continuous-duty applications.
These gears are machined from steel alloy. Steel offers good mechanical strength but has limited inherent corrosion resistance without surface treatment. For damp or outdoor environments, we recommend applying a suitable gear lubricant or anti-corrosion coating after installation. Contact us to confirm the specific surface finish for your selected variant.
Bore diameter varies by module and tooth count. Check the variant detail or contact us with your required shaft diameter before ordering. A bore that is too small cannot be forced onto the shaft; a bore that is too large will cause runout and vibration. If you need a custom bore size, consult a local machine shop for post-purchase boring.
Yes. These are a common choice for right-angle drive shafts in CNC router Z-axis assemblies, robotic joint articulation, and custom automation rigs. Mod 3 and Mod 4 variants are particularly popular for robotics due to their compact size. Ensure your motor torque rating is compatible with the gear's load capacity for your specific module and tooth count.
All packs contain the same gear (same module and tooth count as selected). Ordering 2 pcs gives you a matched pair for a complete 90° 1:1 drive set. Ordering 3 pcs gives you a pair plus one spare — useful for production environments or long-running machinery where downtime from a broken gear is costly.
