SGE series Module 1.0 Pressure angle 20° (regular teeth) Number of teeth: 90 Shape: B1 Standard circle diameter d(mm): 90 Hole diameter b(mm): 10 Tooth width b(mm): 10 Module m: 1.0 Number of teeth Z: 90 Tip circle diameter da(mm):92 牙齿宽度W(mm):10 孔直径DD(H7)(MM):10 集线器外部形状DH(mm):65 集线器长度LH(mm):10 总长度L(MM):20