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ns thread callout help
i would like to know how to properly call out a ns external thread (shaft) for a bearing locknut. the locknuts are common (n-05 at most suppliers) and the thread o.d. is .969 with 32 tpi. i have found different manufacturers with slightly different tolerances but most seem to be class b. some call this same thread 25mmx32 having the same o.d.
this is a replacement shaft for a north american machine.
i am used to calling out standard fractional threads, but in this case do i use decimals? and tolerance?
can someone point me to a definative chart pls.
ps ive look in my machinerys handbook and can't find an ns spec chart
thanx
first off look here......

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借用达朗贝尔的名言：前进吧，你会得到信心!
[url="http://www.dimcax.com"]几何尺寸与公差标准[/url]

2009-09-05, 11:54 AM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	ns thread callout help ns thread callout help i would like to know how to properly call out a ns external thread (shaft) for a bearing locknut. the locknuts are common (n-05 at most suppliers) and the thread o.d. is .969 with 32 tpi. i have found different manufacturers with slightly different tolerances but most seem to be class b. some call this same thread 25mmx32 having the same o.d. this is a replacement shaft for a north american machine. i am used to calling out standard fractional threads, but in this case do i use decimals? and tolerance? can someone point me to a definative chart pls. ps ive look in my machinerys handbook and can't find an ns spec chart thanx first off look here...... __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]