Split coupling
Split coupling
(OP)
I am designing a brass split coupling to be used in a four jaw chuck to prevent damage to a shaft from the jaws while the shaft is being turned. The OD of the shaft is 2.5590 +/- 0.0001. If I am going to make the split in the coupling 0.125, will it be okay if I make the ID of the coupling 2.565 or should I make it slightly larger?





RE: Split coupling
I am assuming that the split coupling you are talking about is two-piece. That, and I am assuming that you need a slight interference fit on the shaft as to eliminate any chatter or movement during the machining operaton.
Your tolerance = 2.5590 +/- .0001
Maximum Mat'l Condition of shaft = 2.5591
Minimum Mat'l Condition of shaft = 2.5589
You must accomodate the minimum mat'l condition in order for your coupling to be useful in all situations.
RE: Split coupling
RE: Split coupling
When I had a situation such as yours where a part had to be
protected from damage, I used to remove the standard jaws
and replace them with soft mild steel blank ones,which after
centralising were bored out to the component size.
regards desertfox
RE: Split coupling