Z=0-200, M=0-4, diameter=0-400mm, quality can reach GB 4 The gears: Tooth (Z)Modul(M)Diameter(Φ)Normal Press Angle(a)DescriptionQuality (Chinese standard)1-2000-60-600mm20°, 25° or according to the customer's requirment.Pinion gear, Spiral gear, Large gear,GB7, GB 6, GB 5, GB4Note: 1.The gears material can be 40Cr, 45#, 42CrMo,20CrMnTi, 16MnCr5 etc.or according to the customer's requirements. 2. ...