Requirements on materials

* Polished or well brushed materials are required; length range: 1000~3000mm.

*The material diameter tolerance consistency is within ±0.02mm;

* Material roundness tolerance consistency is within 0.005~0.01mm;

*The material straightness requirement is within 0.35mm/m;

* When the hardness of materia is higher than HRC28, it needs to be declared in advance.