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When a slipping or undersized gear disrupts your CNC router, robotics arm, or motor-driven mechanism, the entire project stalls. Engineers, makers, and automation builders who need consistent tooth engagement and repeatable torque transfer rely on flat spur gears with tight dimensional tolerances — not generic hardware-store substitutes.
This set includes 8 identical Module 1 flat spur gears machined from carbon steel. Each gear features 58 teeth with a standard Module 1 (1 mm/tooth) pitch, an outer diameter of approximately 60 mm (2.36 in), and a bore diameter that accommodates common motor shaft sizes — typically 5–8 mm (0.20–0.31 in). The flat face profile and uniform tooth geometry ensure smooth meshing with any compatible Module 1 mating gear.
Typical use cases include DIY CNC gantry drives where consistent rack-and-pinion engagement is critical, small robotics joint actuators requiring compact metal cogwheels, and motor pinion assemblies in 3D printer extruder or conveyor systems where a 58-tooth module 1 spur gear delivers the right reduction ratio.
Machined from carbon steel for solid rigidity and resistance to deformation under load — suitable for continuous-duty mechanical drives.
58-tooth Module 1 geometry ensures direct interchangeability with any M1-rated rack, pinion, or mating spur gear in your drivetrain.
Low-profile flat spur design minimizes axial space requirements, making these cogwheels ideal for tight enclosures and compact automation frames.
Uniform tooth pitch and depth across all 8 gears in the set ensures repeatable meshing force and reduced backlash in paired gear assemblies.
Receive 8 identical gears per order — enough to stock a full project build or maintain spares for multi-axis CNC and robotics systems.
Bore diameter sized for common motor shafts (typically 5–8 mm / 0.20–0.31 in). Confirm your shaft diameter against the variant options before ordering.
| Module | 1 (1 mm/tooth) |
|---|---|
| Number of Teeth | 58 |
| Outer Diameter | ~60 mm (2.36 in) |
| Pitch Diameter | 58 mm (2.28 in) |
| Bore Diameter | See variant options |
| Face Width (Thickness) | See variant options |
| Material | Carbon Steel |
| Finish | See variant options |
| Gear Type | Flat Spur Gear |
| Pressure Angle | 20° |
| Quantity per Set | 8 pcs |
| Weight (per set) | ~350 g (12.3 oz) |
These are standard Module 1 spur gears. Any gear, rack, or pinion rated Module 1 (M1) will mesh correctly. Check that your existing components are labeled M1 or have a pitch of 1 mm per tooth. If you are unsure, measure the outer diameter of a known gear: for a 58-tooth M1 gear, the OD should be approximately 60 mm.
Bore diameter varies by variant — please check the variant options above before ordering. Common bore sizes for M1 gears in this tooth count range from 5 mm to 8 mm. If your motor shaft diameter is not listed, contact us to confirm availability.
Carbon steel provides solid load-bearing capacity for light-to-medium duty applications such as CNC gantry drives, extruder mechanisms, and small robotic joints. For heavy-duty industrial applications with sustained high torque, consider hardened steel or helical gear alternatives. These gears are well-suited for maker, prototyping, and small-machine use cases.
Carbon steel has moderate corrosion resistance. For indoor, dry environments these gears perform reliably without additional treatment. If used in humid or outdoor conditions, applying a light machine oil or grease to the tooth surfaces is recommended to prevent surface oxidation and extend service life.
Each gear in the set is identical and fully independent. You can use as many or as few as your project requires. The 8-piece quantity is designed to cover multi-axis builds or provide replacement spares without needing to reorder frequently.
These gears use a standard 20° pressure angle, which is the most common standard for metric spur gears. When pairing gears, both the mating gear must share the same module (M1) and the same pressure angle (20°) to mesh correctly. Mixing pressure angles — even with the same module — will cause poor tooth contact and accelerated wear.
Gear ratio is determined by dividing the tooth count of the driven gear by the tooth count of the driving gear. A 58-tooth gear paired with a 29-tooth pinion gives a 2:1 reduction ratio, halving speed and doubling torque. Use this gear as the driven (output) gear in reduction stages, or as the driver in overdrive configurations depending on your application.
