Standard for conectricity used in machining?
Standard for conectricity used in machining?
(OP)
Hi everyone,
what is the standard concentricity tolerance in machining T6 grade aluminium alloys?
Thanks,
V.
what is the standard concentricity tolerance in machining T6 grade aluminium alloys?
Thanks,
V.





RE: Standard for conectricity used in machining?
You have to specify what you will tolerate on your drawing.
Mike Halloran
Pembroke Pines, FL, USA
RE: Standard for conectricity used in machining?
Specified tolerance should arguably be based on primarily functional considerations, then verified that it can be achieved cost effectively.
Do you really mean concentricity or more generic coaxiality which might be run-out or even position tolerance?
What machining process are you interested in?
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Standard for conectricity used in machining?
RE: Standard for conectricity used in machining?
CNC is not a manufacturing process, it's a way of controlling machines for many processes.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Standard for conectricity used in machining?
RE: Standard for conectricity used in machining?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Standard for conectricity used in machining?
Chris
SolidWorks 13
ctopher's home
SolidWorks Legion
RE: Standard for conectricity used in machining?
Just because something is CNC milled does not mean you can always achieve the same positional accuracy. If there are surfaces machined in one chucking with the same tool the result will be much better than if multiple tools are used and the part has to be flipped over and re-chucked.
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RE: Standard for conectricity used in machining?
Centreing in a lathe depends to some extent on whether or not the machinist needs to re-chuck your part. If two features have to be centred, you should design them to be machinable on one setup.
I strongly agree with dgallup, above. Your tolerances should be based on functional requirements. You do need to be aware of what your fabricators can do.
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JHG
RE: Standard for conectricity used in machining?
RE: Standard for conectricity used in machining?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems