question about drawing 1

[JoannDu]

Hi folks, I am new to the mechanical design drawing. I want to ask you guys what are the circled parts in the picture called. And does anyone know the drawing standard to that? Any advice are appreciated.

http://photos.yahoo.com/joann_du

 

[GregLocock]

The 45 degree angled cut is called a chamfer.


Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[MadMango]

As for drawing standard, I think it is ISO, but with so few dimensions it is hard to tell.

[green]"Art without engineering is dreaming; Engineering without art is calculating."[/green]
Steven K. Roberts, Technomad
Have you read faq731-376 to make the best use of Eng-Tips Forums?

 

[Cockroach]

Do you mean "exploded views", showing additional detail on the print?

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

 

[ewh]

Chamfers and what I would call (thread) reliefs.

 

[TheTick]

The feature where the diameter changes is called an undercut or relief. These are used because it is not possible always to be sure a corner is square, so extra material is removed to me sure other parts like bearings fit correctly.

 

[SnTMan]

JoannDu, you might do well to get a classic engineering graphics textbook. Used bookstores are full of 'em.

Regards,

Mike

 

[JoannDu]

Thanks guys for all your instructions. Really helped me a lot.

 

[diamondjim]

I am with the tick.
The illustrations show
a groove that allows for the the
spline or thread to be fully cut
across that section of the part.
The chamfer is probably an
option to create less of a stress
raiser or to clear a radius on
the tool that cuts the groove.