SPIRO-SK Self-tightening Drill Chuck13/16

Self-tightening flat jaw drill chuck with metal sleeve, ideal for use in machining centers, stationary drills and drilling machines with high precision requirements. Precise concentricity of up to 0.07 mm over the whole clamping range. Increase in the clamping force proportional to the cutting force by automatic retightening function and no releasing in counterclockwise rotation. Conical mount for maximum driving force and precision.