Rugged chuck jaw FHB

Hard top jaws for universal use. The jaw unit – base jaw FGB and hard top jaw FHB – is mainly used for machining a workpiece in the first operation. To increase the coefficient of friction, the clamping surfaces of the top jaw are provided with a cobblestone toothing. To increase concentricity, hard top jaws should be ground in the chuck under clamping pressure and no longer separated from the base jaw.