Type “SF” Replaceable Bushing, 1144 Steel, 1/2 x 3/4 x 0.2188 in.

SF drill bushings are replaceable bushings generally used with a liner bushing and lock crew. Use SF bushings when you expect to replace bushings during the tooling’s lifetime, or to switch bushings to perform multi-step operations with the same tooling. SF bushings combine the benefits of older S-type slip-renewable and F-type fixed renewable bushings: one side of SF drill bushings features a lock screw recess for fixed mounting; the other has a locking recess that allows the bushing to slip down, then rotate to lock in place. S and F types are now obsolete, and combination SF drill bushings will be supplied at no extra charge.