SGE series Module 1.5 Pressure angle 20° (regular teeth) Number of teeth: 30 Shape: B1 Standard circle diameter d(mm): φ45 Hole diameter (mm): 8 Tooth width b(mm): 15 Module m: 1.5 Number of teeth Z: 30 Tip circle diameter da(mm):φ48 牙齿宽度DD(H7)(MM):φ8 集线器外部形状DH(mm):φ38 集线器长度LH(mm):15 总长度L(mm):30