Chamfer Designation on Print
Chamfer Designation on Print
(OP)
Can someone explain exactly the meaning of this callout on a print or point me in the direction of the standard?
At first look it is specifying a chamfer with size of 0.5 to 0.13mm but does it mean a 45deg chamfer? if so, what is the angle deviation allowed? or is it just a corner break that falls between a 0.13mm chamfer at 45deg and 0.5mm at 45deg?
Any help would be appreciated, we have exhausted our resources here and are trying to be very thorough in meeting the print in its entirety. We can not locate it in the ASME Y14.5M standard.
Thank you.
At first look it is specifying a chamfer with size of 0.5 to 0.13mm but does it mean a 45deg chamfer? if so, what is the angle deviation allowed? or is it just a corner break that falls between a 0.13mm chamfer at 45deg and 0.5mm at 45deg?
Any help would be appreciated, we have exhausted our resources here and are trying to be very thorough in meeting the print in its entirety. We can not locate it in the ASME Y14.5M standard.
Thank you.





RE: Chamfer Designation on Print
Chamfers are covered in figures 1-41 to 1-44 and section 1.8.15 of ASME Y14.5M-1994.
I think your image may contravene the standard if so going back to whoever gave you the drawing and ask is perhaps the only option.
KENAT,
Have you reminded yourself of FAQ731-376: Eng-Tips.com Forum Policies recently, or taken a look at posting policies: http://eng-tips.com/market.cfm?
RE: Chamfer Designation on Print
That drawing detail is for an "edge" not for a "chamfer". ISO 13715 Technical drawings — Edges of undefined shape — Vocabulary and indications is one standard that defines edges and how to interpret the drawing. The specific example that you provided means that the edge must be free of burrs and requires an "undercut", which in this ISO standard means a corner break that is not defined by an angle. Here is the official description from Table 2 in ISO 13715 using your specific values:
External edge without burr; undercut in the zone from 0.13 mm to 0.5 mm
Two images accompany the description: one shows a chamfer and one shows a radius, although these are meant to be illustrative and not limiting.
RE: Chamfer Designation on Print
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RE: Chamfer Designation on Print
RE: Chamfer Designation on Print
The answers to your questions are as a depth, yes, and yes.
RE: Chamfer Designation on Print
However, if the drawing is perhaps from a vendor working to iso stds then sounds like TVP has given the answer.
KENAT,
Have you reminded yourself of FAQ731-376: Eng-Tips.com Forum Policies recently, or taken a look at posting policies: http://eng-tips.com/market.cfm?
RE: Chamfer Designation on Print
The print in question is for a part that could be simplified as a hollow cylinder (or tube) and the specification is pointing at what I assumed was an ID corner break (or chamfer).
It is an old print, assumed to be converted from imperial measurements to todays version.
Thank you again to everyone.