SGE series Model 3.0 Pressure angle 20° (regular teeth) Number of teeth: 25 Shape: B1 Standard circle diameter d(mm): φ75 Hole diameter (mm): 12 Tooth width b(mm): 30 Total length (mm): 50 Model m: 3.0 Number of teeth Z: 25 尖端圆直径DA(mm):φ81 牙齿宽度w(mm):30 孔直径DD(H7)(MM)(MM):φ12 Hub外部形状DH(mm):φ60 φ60 Hub长度LH(MM):20