RS PRO Steel 40 Teeth Spur Gear, 0.5 Module, 4mm Bore Diam, 20mm Pitch Diam, 9mm Hub Diam

Use these steel spur gears from RS PRO to get your industrial equipment moving. Our extensive range of spur gears is selected for their high-quality, ease of use and performance while ensuring the correct power, torque multiplication, and speed reduction. To obtain your ideal solution, browse the range using the improved filters to locate the module to suit your application.

What is the module?

A module is expressed as d/N which is the pitch diameter divided by the number of teeth. This explains the size of the gear or qualifies the unit size of a gear based on the number of teeth. Use this parameter to conclude if the gear is compatible.

SSN type gears come with M4 grub screws fitted.
SSN10/10B and SSN10/12B are hobbed type pinions with cutter runout after the 5 mm gear face width.