Spur Tooth Rack Pt.CP = Transverse/tooth M = Module Z = Number of teeth Quality = 6h23 Material = C45K DIN 1.0503 Profile = all faces ground Teeth = Hardened and ground/pressure angle a = 20°。 Cumulative pitch error GTf : 0.027 / 300 mm Adjacent pitch error fp(mm) : Module ≦ 3 ; 0.006﹐ Module > 3 ; 0.008