SGE series Model 2.0 Pressure angle 20° (regular teeth) Number of teeth: 90 Shape: B1 Standard circle diameter d(mm): φ180 Hole diameter (mm): 15 Tooth width b(mm): 20 Model m: 2.0 Number of teeth Z: 90 Tip circle diameter da(mm):φ184 牙齿宽度W(mm):20 孔直径DD(H7)(H7)(MM):φ15 集线器外部形状DH(mm):φ130 集线器长度LH(mm)LH(mm):20 总长度L(MM):40 :40 :40