Material: Bright steel C45K. Tooth area induction hardened, 54 +4 HRC. Precisely Straightened. Teeth milled in quality 8. But the hardening sets the tooth quality to 10-11. Cross-section tolerance h11 = -1/10 to -2/10 depending on size. Straight teeth. Pressure angle 20°. Tooth quality 8d25 modelled on DIN 3962, 3967, 3968. The teeth on the gear racks are manufactured using an overhead milling cutter. This leads to negative tolerances for dimension a and h0: Module 2: -0,2 mm. Module 3 to 4: -0,3 mm. Module 5: -0,4 mm. * Length = Nominal length. The real length is roughly one multiple of the pitch.