SGE series Model 1.5 Pressure angle 20° (regular teeth) Number of teeth: 90 Shape: B1 Standard circle diameter d(mm): φ135 Hole diameter (mm): 12 Tooth width b(mm): 15 Model m: 1.5 Number of teeth Z: 90 Tip circle diameter da(mm):φ138 牙齿宽度W(mm):15 孔直径DD(H7)(H7)(MM):φ12 集线器外部形状DH(mm):φ95 集线器长度LH(mm)LH(mm):15 总长度L(MM):30 :30 :30