Nominal value for pitch diameterModuleHelical angleAccuracy gradeφ180m1.25 1.75β15°A.Bφ180m2 6β15°A.Bφ180m1.25 1.75β5°A.Bφ180m2 6β5°A.Bφ240m2 8β15°A.Bφ240m2 8β5°A.B We can supply all kinds of the cutters, especially the Non-standard ones for u according to ur specific requirements. Need any further details? Pls dont hesitate to contact us!!! We'll response u ASAP.