I have a Piston that I am holding tolerances of .000035 & .000050 on a .2500 Dia. Ball. The material
is 52100 and is Heat Treated to 56-62 HRC. In order to achieve a 4 rms Finish, I polish the Ball
using oil. I have a Sphericity callout to hold .000050 on Diameter. Question I have is during...
I have a 52100 part Spherical Dia. on the end and here is what the drawing asks for.
.2500 +/-.0002 Dia. with a another note stating Sphericity to be within .00005 on Diameter. Should
this be one or the other and not both. Looking for some information on this.
I have a question that someone can answer. I have an Engineering Drawing that requires Case Harden to 88.5-91.5 HR15N. It does not say anything
about what the Core Hardness should be. When you Carburize 8620 you could end up with a range of 25 to 45 HRC range in your Core Hardness numbers...
