Manufacture of multi-sectional hydraulic cylinder and mechanical guide pillar or bar, and used for substituting for axis material for the reduction of weight.
1. Material: steel of JIS G3445, STKM13C or ST52BK + S. The tube is precisely interior bored, and plated with hard chrome after being ground. 2. Surface hardness: HV 800(minimum) up. 3. Hard chrome thickness: 20 micron. 4. Surface roughness: Ry 0.6-1.4s. 5. External diameter accuracy: h7, h8, f8.