SGE series Model 2.5 Pressure angle 20° (regular teeth) Number of teeth: 50 Shape: B1 Standard circle diameter d(mm): 125 Hole diameter (mm): 15 Tooth width b(mm): 25 Total length (mm): 45 Model m: 2.5 Number of teeth Z: 50 尖端圆直径DA(mm):φ130 牙齿宽度W(mm):25 孔直径DD(H7)(H7)(MM)(MM):φ15 集线器外部形状dh(mm):φ90