1 The rack is usually made of 45 steel, and some manufacturers use other special materials to reduce the material cost and improve the mechanical properties of the rack.
2 The length of rack is generally 300-3000mm, which can be customized without standard and can be spliced infinitely.
3 The hardness of the rack surface after quenching and tempering shall be 50-60hrc.
4 After induction heat treatment, there shall be no crack around the oil hole of the rack and no crack on the tooth.
5 In the tooth part of the rack, the quenching depth is generally between 0.1 ~ 1.5mm below the tooth root and 1-3mm at the shaft part.
