Kyle, my 1642 also has no flats on insert or spindle either, I very gently used spindle lock today also
I wonder if there is some way to put it in reverse ??????? without spinning it off the spindle
Good trick Aric, thanks
"If a tree falls in the forrest, and no one is around, do you make a bowl out of it?" (Jerry Rhoads)
Do it the right way---buy a 4$ can of antiseizing compound at a auto parts store. Eliminates jammed threads and misalignment due to washers. Also it lubes the threads which may be used for many years. Most machinist use it faithfully. A dab 2-3 times a year does the trick. Also a properly tightened work piece should not back off when in reverse. A great wrench which fits all chucks is a stout piece of 1/2" thick stick. Stick it in the jaws and make it as long as you like.