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What is the proper cutoff for 3.2 Ra finish?

Q. What is the proper cutoff to check the surface finish of a machined turned product that has a 3.2 Ra max specification ? 0.8, or 0.25, or 0.08 ? We have always used a 0.25 in the past.

Harold Hammond
2nd tier automotive - McArthur, Ohio, USA
2003

? Please define or clarify "cutoff".

AF Kenton
retired business owner - Hatboro, Pennsylvania
2003

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