Membership Services

Re: Double Plus or Minus Tolerance

[ Home ][ Forum Archive ] [ Active Engineering Forum ]

Posted By<" ">Randy Kimball on October 28, 2002 at 22:45:27:

In Reply to: Double Plus or Minus Tolerance posted byDavid E. Wagher on October 28, 2002 at 11:56:02:

I agree with Cragyon, why do this ...
The engineer is telling the machinest he wants
a .250 to .230 hole and to please shoot for .240.
A better notation would be .250 +.000/-.020.
Seeing this any self respecting machinest is going
to ream the hole to .240 and play it safe, if it is
a hole. 'or try to mill, grind, or turn to .240.
... it is a bit like when I tell my vendor job shops,
"Please hold my 1/4" holes a few tight so I can fit
ream them at assembly".

Follow Ups

Subject: Re: Re: Double Plus or Minus Tolerance

Comments:: I agree with Cragyon, why do this ... : The engineer is telling the machinest he wants : a .250 to .230 hole and to please shoot for .240. : A better notation would be .250 +.000/-.020. : Seeing this any self respecting machinest is going : to ream the hole to .240 and play it safe, if it is : a hole. 'or try to mill, grind, or turn to .240. : ... it is a bit like when I tell my vendor job shops, : "Please hold my 1/4" holes a few tight so I can fit : ream them at assembly".

[ Home ][ Forum Archive ] [ Active Engineering Forum ]