Anyone ever "stretch" ER collets slightly beyond their capacity for use without problems?
i.e. 15MM collet (.5905) for 19/32" (.5937) tooling or even using a 13MM collet (.5118) in for 33/64" (.5156) tooling.
I know that they can be damaged if stretched too far, but does a few thousandths make a difference on most applications since they are open that far without being pushed at all?
Runout desired is .001-.003 max. if it matters.
I wouldn't try it on a smaller collet size - but they come in smaller increments to make up for it anyhow.
Regards, Joe Agro, Jr. (800) 871-502201.908.542.0244 Automatic / Pneumatic Drills: