What is the Standard Tolerance for Concentricity?

A

AmQC01

#1
I need help finding information on:

  • What is the standard tolerance for concentricity?

  • Where to find this information?
Thank you,
AmQc01
 
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Jim Wynne

Staff member
Admin
#2
Re: Standard tolerance

Where is the concentricity specification coming from? Can you give us more information about your concern?
 

Michael_M

Trusted Information Resource
#3
Re: Standard tolerance

Are you looking in the title block or notes area of the print? Usually that is were an unspecified tolerances would go.

Outside of that, it changes based on customer. One of our customers basic concentricity call is .005 (unless stated otherwise) while another is .002 and I have seen them out to .010 (but not in a long while).
 
A

AmQC01

#4
This is coming from our customer. The print shows no dimensional call out for the hole to the o.d. of the part. There is also no call out in the tolerance block. I wasn't sure if there was a standard call out ( such as AMSE or DIN ISO).
Thanks for the help and any further help you can give me.

AmQc01
 

Jim Wynne

Staff member
Admin
#5
This is coming from our customer. The print shows no dimensional call out for the hole to the o.d. of the part. There is also no call out in the tolerance block. I wasn't sure if there was a standard call out ( such as AMSE or DIN ISO).
Thanks for the help and any further help you can give me.

AmQc01
If there's nothing on the print or other specifications, there is no requirement. If you feel that there's something off-center that might be a problem, you might want to talk it over with your customer.
 
J

Joelbear5

#6
The drawing is not fully defined. If there is a standard it needs to be referenced somewhere on the drawing, most likely in a general note or the title block.
 

Stijloor

Staff member
Super Moderator
#8
This is coming from our customer. The print shows no dimensional call out for the hole to the o.d. of the part. There is also no call out in the tolerance block. I wasn't sure if there was a standard call out ( such as AMSE or DIN ISO).
Thanks for the help and any further help you can give me.

AmQc01
Another reason why there is a need (required by ISO 9001) to determine and review customer requirements. As Jim stated, if there is no reference to a (GD&T) standard, than there is no requirement.

Also, in the USA, concentricity is in 99% of the cases the wrong application. For coaxiality concerns on stationary parts think Position. For dynamic (rotating) parts think Runout or Total Runout.

Contact the customer, discuss what actually they want, and get it in writing!!

Stijloor.
 
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