This Craftsman vise is clean, lubed and everything on it looks good and functional. I’ve had the screw out, collar removed, checked the collar bearing and all parts cleaned of old greas and regreased.
However, when I turn the screw handle and squeeze the jaws together just a little tight (against themselves or something in the jaws) it goes from a very easy and acceptable action to open and close, to becoming very tight (to both open and close). I can still open and close it, but the effort to do so becomes much harder.
If I open it all or nearly the way (8.35”) , and then close it.. the action loosens back up to what I think is normal again.
I don’t see any burrs anywhere, the screw is super straight, and the action is normal - opening and closing.. unless I squeeze the jaws together right (not overly tight mind you).
What can I do to fix or troubleshoot this further? I’m using Park Tools Polylube 1000 grease and it’s never been an issue before on other vises.
Thanks for your tips!


