SGE series Model 3.0 Pressure angle 20° (regular teeth) Number of teeth: 80 Shape: B1 Standard circle diameter d(mm): φ240 Hole diameter (mm): 20 Tooth width b(mm): 30 Total length (mm): 50 Model m: 3.0 Number of teeth Z: 80 尖端圆直径DA(mm):φ246 牙齿宽度W(mm):30 孔直径DD(H7)(H7)(MM):φ20 集线器外部形状DH(mm):φ170