dimensioning cylindrical taper
dimensioning cylindrical taper
(OP)
One of a few "standard" ways of accurately dimensioning a cylindrical taper is to call out a slope based on DIAMETRAL change : axial distance. And, for safety to use a symbol that looked like an arrowhead.
Is there a GDT symbol for that?
About the best I can do so far is apply an angular dimension to the included angle on the drawing.
Thanks,
Dan T
Is there a GDT symbol for that?
About the best I can do so far is apply an angular dimension to the included angle on the drawing.
Thanks,
Dan T






RE: dimensioning cylindrical taper
Regards,
Scott Baugh, CSWP

Heckler (Mechanical)
Tmoose
Tmoose (Mechanical)
(OP)
SBaugh (Mechanical)
If you look under the Modifing Symbols there is a slope symbol there.
3DVision Technologies
http://www.scottjbaugh.com
Merry Christmas
RE: dimensioning cylindrical taper
The symbol that looks like an arrowhead is Circular runout which controls coaxiality and circularity. If your taper needs to be controled even tighter you might want to consider Total Runout. Total runout controls variations of circularity, straightness, coaxiality, angularity, taper and profile.
But be warned this increases the cost of the part because now the entire surface must lie within the specified tolerance zone.
Best Regards,
Heckler
"Never underestimate the power of very stupid people in large groups" John Kenneth Galbraith
RE: dimensioning cylindrical taper
"The symbol that looks like an arrowhead is Circular runout"
I guess I did not describe the tapersymbol very well.
It's related to the slope symbol.
It's on page 3, Fig 11 here -
http://www.draftingzone.com/shoppingzone/6-1.pdf
It was real embarassing when a part machinedwith a 1:10 cylindrical taper (delta diameter) met a part machined to a 1:10 slope (2D delta radius) in the assembly room.
RE: dimensioning cylindrical taper
There is Up, Down, Inverted Up and a Inverted Down slope symbols there. You can get to this using an Annotation.
But from you first post you mention GD&T. Well if you don't see it in the list, then it's not available and probably isn't a true standard for the standard you are using there.
Regards,
Scott Baugh, CSWP

3DVision Technologies
http://www.scottjbaugh.com
Merry Christmas
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