7.5*55*241*15.4 red, used for motorcycle rear shock absorber, drawn from 60Si2Mn oil quenching spring wire, wound into warp, then completed and set by multi-channel processes, and done surface treatment according to the requirements of customers.
Technical Requirements:
1) Total number of coils: 15.4.
2) Number of active coils: 12.4.
3) Free height: 241mm.
4) Port deburring.
5) Both ends of the surface were wore off, circumference is not less than 3/4.
6) Shot blasted: pills ¢ 0.8mm ~ ¢ 1.2mm, intensity 0.2 ~ 0.45A, coverage of 80%.
7) Surface treatment: red spray.