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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Surface finish symbols

I want to know the surface finish of a component having only one circle in Lay symbol. surface finish is not directly specified in drawing but only one circle is shown.

Yogesh Wad
Trader of machining components - Nasik, Maharashtra, India
2004

I'm not looking at the symbol, so I'm only guessing...

A small circle lying in the "V" area of a "checkmark" symbol means "no material may be removed from this surface". If it's a larger circle and no checkmark is around, it's probably just an item number callout where the draftsperson didn't get back to putting the item number in :-)

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

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