This is a toothed wheel with straight toothing (involute profile). Technical data as follows:
External Ø = 12 mm; Primitive Ø = 10 mm; Root Ø = 7.5 mm
Normal module (Mn) = 1
Teeth number (Z) = 10
Pressure angle (Alfa) = 20°
Teeth angle (Beta) = 0° (Straight)
Teeth width (b) = 10 mm
Double Hub Ø 5 mm with key 2x1 mm