1. Scratch is upper standard Rz6.9.
We judge it is OK.
But, you can see the result is Rz5.2 ~ Rz5.7. (apporoximate with standard)
I think KBT can delivery parts were be over than Rz6.9
So, please let me know how can you do to improve your quality?
2. Abnormal color.
We think it is OK.
3. Have concave at outside diameter.
We need you have countermeasures for this problems.
And give me this occur's cause together.