Self-tightening drill chuck SPX

SPX drill chucks offer the same features as SP, with the advantage of being furnished with milled wrench flats and spanner wrench to allow application of supplementary gripping torque. Light tightening increases gripping torque up to 3 times higher than hand tightening. For use on CNC machines in drilling, boring, counter-boring and milling operations requiring heavy feed. Resistance to tool loosening on high- speed machines with instant spindle stop.