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When a stripped or undersized gear brings your build to a halt, you need a replacement that fits precisely and holds up under load. These M1.5 Mod1.5 spur gears are designed for makers, robotics builders, and mechanical engineers who demand accurate tooth profiles and consistent bore tolerances across every unit.
Each gear is machined from metal and offered in three tooth counts — 35T, 40T, and 50T — with bore diameters ranging from 6 mm (0.24 in) to 25 mm (0.98 in). The module 1.5 pitch ensures full interchangeability with any standard Mod 1.5 rack, pinion, or mating gear in your drivetrain.
Typical applications include DC motor output shafts in robotics platforms, reduction stages in CNC axis drives, and speed-ratio adjustments in custom conveyor or winch assemblies — anywhere a compact, metal spur gear with a standardized module is required.
| Module (Mod) | 1.5 |
|---|---|
| Tooth Count Options | 35T / 40T / 50T |
| Bore Diameter Options | 6, 8, 10, 12, 14, 15, 16, 17, 20, 25 mm |
| Pressure Angle | See variant options |
| Material | Metal (see variant options for alloy) |
| Face Width | See variant options |
| Outer Diameter (35T) | Approx. 55.5 mm (2.19 in) |
| Outer Diameter (40T) | Approx. 63.0 mm (2.48 in) |
| Outer Diameter (50T) | Approx. 78.0 mm (3.07 in) |
| Hub Style | See variant options |
| Pack Quantity | 1 / 2 / 3 / 4 / 5 pcs |
| Finish | See variant options |
The tooth count determines your gear ratio when paired with a pinion. A higher tooth count (e.g., 50T) on the driven gear produces more torque and lower output speed; a lower count (e.g., 35T) gives higher speed with less torque. Divide the driven gear teeth by the driving gear teeth to get your ratio. Match this to your motor's RPM and the load requirements of your application.
Measure your motor or drive shaft diameter with a caliper. Select the bore that matches exactly — available in 6, 8, 10, 12, 14, 15, 16, 17, 20, and 25 mm. If your shaft falls between sizes, a slightly larger bore can be used with a keyway or set-screw arrangement, but an exact fit is always preferred for concentricity and load transfer.
Yes. Module 1.5 is an internationally standardized pitch. These gears will mesh correctly with any other Mod 1.5 spur gear, rack, or pinion that shares the same pressure angle. Confirm the pressure angle (typically 20°) matches your existing components before assembling.
The metal construction provides significantly greater strength and wear resistance compared to plastic or nylon alternatives. Actual load capacity depends on the specific alloy, face width, and operating speed. For continuous-duty or high-torque applications, verify the gear's rated torque against your system's peak load with an appropriate safety factor.
Corrosion resistance depends on the specific metal alloy and surface finish of the variant you select. For outdoor or high-humidity environments, look for variants with a protective coating or consider applying a compatible gear lubricant to extend service life. Contact us to confirm the finish details for your chosen variant.
Absolutely. M1.5 spur gears are widely used in robotics drive trains, CNC axis reduction stages, and automated conveyor systems. The standardized module ensures you can source mating components from multiple suppliers, and the range of bore sizes accommodates most stepper motor and servo shaft diameters used in hobby and light-industrial CNC builds.
Single pieces (1 pc) are ideal for prototyping or one-off repairs. Multi-packs (2–5 pcs) offer a per-unit cost saving and are practical when building symmetric gear stages, stocking spares for production equipment, or assembling multiple identical mechanisms in a batch. Select the pack quantity that matches your project scale.
