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How to get 4Ra finish on 316 ss in a .020" dia thru hole

(-----) 2004

We have an opportunity to produce parts that include a .020" dia. hole ±.001" with a 4Ra finish. This is a thru hole in 316 SS. We have several CNC lathes, so creating the hole is not an isssue, just the finish. I am looking for sugestions on manufacturing and inspection equipment and processes.

Steve Hansen
Machine shop - Round Rock, Texas
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2004

YOU KNOW FOLKS, SIZE, SHAPE, QUANTITY AND MATERIAL DOES MATTER IN ANSWERING QUESTIONS! Didn't mean to take it out on the person who asked this question, but there are a lot of similarly stated questions. To answer this question, I can only make a guess again, because of the lack of detailed info; however, the RMS you indicated would tend to make me think you should look into lapping type equipment.

AF Kenton
retired business owner - Hatboro, Pennsylvania
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2004

Electropolish the ID!

Johnny McCaffrey
- Houston, Texas
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