Contcat Us For Quote Now !

0086 188 5753 9999

Quality standard of special steel balls

Update:20-05-2020
Summary:

From the launch of raw materials to the completion of p […]

From the launch of raw materials to the completion of product processing, the steel ball requires multiple detection auxiliary production processes, which mainly include: cold pier → smooth ball → heat treatment → strengthening → hard grinding → preliminary research → sorting → refined research.

1. Raw material quality standards
The material used for the ink-specific steel balls is GCr15 bearing steel. On this basis, Qingdao Feite has innovatively produced GCr15SiMn and martensitic stainless steel balls with better wear resistance. Used in the ink manufacturing industry.

2. Steel ball dimensional accuracy and geometric accuracy standards
For steel balls with a diameter of 1.2 ~ 12.7mm, the variation of the ball diameter is ≤25μm; the variation of the batch diameter is ≤50μm; the spherical error is ≤25μm; the gauge value is ± 150μm (can be formulated according to the requirements of users).

3. Steel ball crushing load standard
This standard is an important standard to ensure that the steel ball is not broken

4. Quality standard of steel ball heat treatment
This standard is an important foundation to ensure that the steel ball has high wear resistance and high hardness