SGE series Module 0.8 Pressure angle 20° (regular teeth) Number of teeth: 25 Shape: B1 Standard circle diameter d(mm): 20 Hole diameter d(mm): 5 Tooth width b(mm): 8 Module m: 0.8 Number of teeth Z: 25 Tip circle diameter da(mm):21.6 牙齿宽度W(mm):8 孔直径DD(H7)(MM):5 集线器外部形状DH(mm):16 集线器长度LH(mm):10 总长度L(MM):18