SGE series Module 2.0 Pressure angle 20° (regular teeth) Number of teeth: 30 Shape: B1 Standard circle diameter d(mm): φ60 Hole diameter (mm): 10 Tooth width b(mm): 20 Module m: 2.0 Number of teeth Z: 30 Tip circle diameter da(mm):φ64 牙齿宽度DD(H7)(MM):φ10 集线器外部形状DH(mm):φ50 轮毂长度LH(mm):20 总长度L(mm):40 :40