Type “SF” Replaceable Bushing, 1144 Steel, 5/16 x 1-3/8 x 0.1285 in.

SF drill bushings are replaceable bushings generally used with 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.