Chamfer Designation on Print 2

[mecheng05]

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.

 

[KENAT]

Your image was so small pixel size it was difficult to make out what was goin on.

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 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?

 

[TVP]

mecheng05,

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.

 

[ewh]

Is it stated on the drawing what standard to use in interpretation?

"The ambassador and the general were briefing me on the - the vast majority of Iraqis want to live in a peaceful, free world. And we will find these people and we will bring them to justice." - [small]George Bush, Washington DC, 27 October, 2003[/small]

 

[btrueblood]

Man, is that unclear or what - which way are you to measure 0.13 to 0.5mm, as a depth or a radial distance? And why the (-) signs in front, or is that what specifies it as an "undercut" - if you have (+) signs, does that mean a hanging burr 0.13 to 0.5 mm wide?

 

[TVP]

btrueblood,

The answers to your questions are as a depth, yes, and yes.

 

[KENAT]

ewh brings up a good point, what standard is the drawing too. The OP mentions 14.5 in the OP so I didn't ask & assumed ASME standards in which case I'm not sure the callout it legit.

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 recently, or taken a look at posting policies:

http://eng-tips.com/market.cfm?

 

[mecheng05]

The print is from one of the Car Makers and it states on the print that it is to ASME Y14.5M-1994 standard. I reviewed the standard as well as some other drafting texts we have and could not find any reference to it.

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.