SGE series Module 0.8 Pressure angle 20° (regular teeth) Number of teeth: 30 Shape: B1 Standard circle diameter d(mm): 24 Hole diameter d(mm): 5 Tooth width b(mm): 8 Module m: 0.8 Number of teeth Z: 30 Tip circle diameter DA(mm):25.6 牙齿宽度W(mm):8 孔直径DH(mm):5 集线器外部形状DH(mm):20 集线器长度LH(mm):10 总长度L(mm):18