Resources and References
Useful quick reference resources for the manufacturing industry
Cast Microfinish Comparator
Here are examples of cast finishes from 20 to 900 RMS. You will see Die Casting offers the smoothest finish, while an as-cast Sand Casting finish will be the most coarse.
Machining Finishes
15
Machining Finishes based on the type of machining process used.
RA values /surface finish grade numbers
22
Compare N, RA, RMS, CLA and RT values