Tolerance Calcs
Tolerance Calcs
(OP)
Just thought this may be helpful to any of you.
ht tp://www.e ngineersed ge.com/Cal ulators_On line.shtml
ht
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP2.0 / PDMWorks 05
ctopher's home site
FAQ371-376
FAQ559-1100
FAQ559-1091
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RE: Tolerance Calcs
You do realize don't you that the formulae for GD&T positional tolerances are very simple?
For a screw passing through a clearance hole into a tapped hole, the positional tolerances equal one half the diametral clearance, based on MMC values. For a bolt passing through two clearance holes, the positional tolerances equal the diametral clearance, again, based at MMC.
Most of the time, I do the arithmetic in my head. Without the convient tables, people might consider alternate GD&T schemes like setting the positional tolerance to zero (usually but not always at MMC), using holes as datums.
JHG
RE: Tolerance Calcs
The link is just for anyone that does not understand it and want a visual tool. Just for info.
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP2.0 / PDMWorks 05
ctopher's home site
FAQ371-376
FAQ559-1100
FAQ559-1091
FAQ559-716
RE: Tolerance Calcs
I also do the math in my head, or scratch it down with other numbers I'm working with, but this is a good tip. The site has alot of good reference information other than GD&T.
RE: Tolerance Calcs
Tunalover
RE: Tolerance Calcs
Sometimes when I get very frustrated with coworkers, I catch myself doing the same. Or sometimes if I'm rushed, I may use the online site for check.
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP2.0 / PDMWorks 05
ctopher's home site
FAQ559-1100
FAQ559-716