Put a Sock on it. . .
© Frank Ford 2004; Photos by FF
It doesn't get much simpler than this one. I often machine identical parts in batches up to about 100 pieces, so I give my collet closer a fair workout. As I'm reaching over with a slippery hand covered in cutting oil, I sometimes slide right off the handle of the closer. Now when I'm doing batches, I simply secure an old gym sock on the handle with a rubber band:
So, each time I reach for the lever, I wipe a bit of the cutting oil off my hand, and I get a good grip, too.