Sep 15, 2010 #1 Acester Industrial Sep 15, 2010 5 What is the tolerance for a Surface Roughness Ra 3.2um. Is it 3.2 ± the general tolerance on the print. Or is 3.2 the max reading as in 0 - 3.2
What is the tolerance for a Surface Roughness Ra 3.2um. Is it 3.2 ± the general tolerance on the print. Or is 3.2 the max reading as in 0 - 3.2
Sep 15, 2010 2 #2 KENAT Mechanical Jun 12, 2006 18,387 Roughness is usually given as an RMS statistical average number. I think a resource like Machineries may have enough info to help you out. Other wise looke in ASME B46.1 or equivalent. Posting guidelines faq731-376 http://eng-tips.com/market.cfm? (probably not aimed specifically at you) What is Engineering anyway: faq1088-1484 Upvote 0 Downvote
Roughness is usually given as an RMS statistical average number. I think a resource like Machineries may have enough info to help you out. Other wise looke in ASME B46.1 or equivalent. Posting guidelines faq731-376 http://eng-tips.com/market.cfm? (probably not aimed specifically at you) What is Engineering anyway: faq1088-1484
Sep 15, 2010 1 #3 TVP Materials Apr 12, 2002 4,592 Surface roughness is a maximum, meaning Ra 3.2 micrometers maximum. Upvote 0 Downvote
Sep 16, 2010 #4 mrainey Industrial Jun 22, 2002 225 I have seen sealing surfaces rejected for being "too smooth". Software For Metalworking http://closetolerancesoftware.com Upvote 0 Downvote
I have seen sealing surfaces rejected for being "too smooth". Software For Metalworking http://closetolerancesoftware.com
Sep 16, 2010 #5 KENAT Mechanical Jun 12, 2006 18,387 Which is why ASME B46.1 allows you to specify an upper and lower limit. Normally though, only the upper limit is specified. Posting guidelines faq731-376 http://eng-tips.com/market.cfm? (probably not aimed specifically at you) What is Engineering anyway: faq1088-1484 Upvote 0 Downvote
Which is why ASME B46.1 allows you to specify an upper and lower limit. Normally though, only the upper limit is specified. Posting guidelines faq731-376 http://eng-tips.com/market.cfm? (probably not aimed specifically at you) What is Engineering anyway: faq1088-1484
Sep 16, 2010 Thread starter #6 Acester Industrial Sep 15, 2010 5 My readings range from .97 - 1.02. is this "too smooth" from the 3.2 callout Upvote 0 Downvote
Sep 16, 2010 #7 KENAT Mechanical Jun 12, 2006 18,387 Unless they explicitly list a lower limit I don't think there is such a thing as 'too smooth'. Posting guidelines faq731-376 http://eng-tips.com/market.cfm? (probably not aimed specifically at you) What is Engineering anyway: faq1088-1484 Upvote 0 Downvote
Unless they explicitly list a lower limit I don't think there is such a thing as 'too smooth'. Posting guidelines faq731-376 http://eng-tips.com/market.cfm? (probably not aimed specifically at you) What is Engineering anyway: faq1088-1484
Sep 16, 2010 Thread starter #8 Acester Industrial Sep 15, 2010 5 There is no lower limit callout. Thank you KENAT Upvote 0 Downvote
