Total Runout tolerance Vs Position Tolerance
Total Runout tolerance Vs Position Tolerance
(OP)
Hi,
What is the similarity / difference between a total runout tolerance and position tolerance. Can position tolerance be used in lieu of runout tolerance
Thanks
What is the similarity / difference between a total runout tolerance and position tolerance. Can position tolerance be used in lieu of runout tolerance
Thanks





RE: Total Runout tolerance Vs Position Tolerance
You may want to get a copy of ASME Y14.5.
More info: http://www.tec-ease.com/gdt-terms.php
Chris
SolidWorks 10 SP4.0
ctopher's home
SolidWorks Legion
RE: Total Runout tolerance Vs Position Tolerance
RE: Total Runout tolerance Vs Position Tolerance
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Total Runout tolerance Vs Position Tolerance
Total runout is applicable to small cylindrical parts with co-axial features and is usually confirmed using divider head (chuck) with a dial indicator on a stand. It confirms a combination of roundness, straightness of an axis, off center (concentricity) and straightness of a surface relative to a datum C/L.
Positional (in RFS) on the same small cylindrical co-axial part will only reflect how far the feature is off center relative to the datum C/L. That is it.
Positional (at MMC) is conducive to a checking fixture and, if built correctly, will confirm whether or not the feature is within the specification boundary (MMB).
Hope this helps.
Dave D.
www.qmsi.ca
RE: Total Runout tolerance Vs Position Tolerance
If you're just looking to primarily ensure interchangeability (i.e. any stepped shaft will always fit in any stepped hole or the like) then position is most likely adequate.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Total Runout tolerance Vs Position Tolerance
"Good to know you got shoes to wear when you find the floor." - Robert Hunter
RE: Total Runout tolerance Vs Position Tolerance
Peter Stockhausen
Senior Design Analyst (Checker)
Infotech Aerospace Services
www.infotechpr.net