Fast lock chuck

INTRODUCTION

This document describes the functionality of the chuck, and the basic dimensions.  Useful data (unit conversion), materials and complete manufacturing drawings also included in appendix.

MAIN SECTION

The chuck was designed for tools with a straight shank and a tongue at its clamping end.  It is very simple in use and functionality. A compression spring constantly forces through the outer rings the two locking jaws to engage with the tool. These two locking jaws (placed symmetrically along chuck’s body) hold the tool inside the chuck’s drive from a tool’s abutment. When we push the outer rings towards the taper shank the jaws release the tool. The engagement screw transfers the torque from the chuck’s body to the tool. Oil holes and grooves are important for inner lubrication of the chuck. Inner lubrication helps for fast engagement and disengagement of the tool. In order to make a reliable tool drive care must be taken when drilling together the engagement screw with the chuck body. Making the hole before heat treatment and finishing after with a reamer to suit a dowel pin is better.