We are familiar with honing pipes. Honing pipes are a kind of high-precision steel pipe material processed by cold drawing or hot rolling. Because the inner and outer walls of the precision steel pipe have no oxide layer, withstand high pressure without leakage, high precision, high finish, no deformation during cold bending, flaring, and flattening without cracks, etc. It is mainly used to produce pneumatic or hydraulic products. There is a residual stress layer after processing to improve fatigue strength. Improve surface roughness. Correct roundness, ellipticity can be ≤0.01mm. Improve the quality of fit, reduce wear and prolong the service life of parts, but the processing cost of parts is reduced. Improve surface hardness, eliminate stress deformation, and increase hardness.