SGE series Model 2.5 Pressure angle 20° (regular teeth) Number of teeth: 30 Shape: B1 Standard circle diameter d(mm): 75 Hole diameter (mm): 12 Tooth width b(mm): 25 Total length (mm): 45 Model m: 2.5 Number of teeth Z: 30 尖端圆直径DA(mm):φ80 牙齿宽度W(mm):25 孔直径DD(H7)(H7)(MM)(MM):φ12 集线器外部形状DH(mm):φ65 φ65 HUB长度LH(mm):20