Tool assembly

A tool assembly comprising a tool holder and a tool removably secured to a forward end thereof;

• wherein:
• the tool has a longitudinal tool axis and comprises a tool head, a coupling member and a shank therebetween;
• the shank tapers axially rearwardly from the tool head to the coupling member, the coupling member extends axially rearwardly from the shank and comprises a frustoconical head that tapers forwardly,
• the tool holder comprises a sleeve, a collet and a pusher,
• the sleeve having a longitudinal sleeve axis and comprising:
• a cavity having a cavity wall which opens out to a forward end thereof, the cavity wall comprising a forward tapering portion and a cylindrical portion, the forward tapering portion tapering axially rearwardly from the forward end of the sleeve towards the cylindrical portion;
• the collet is located within the cavity and comprises:
• a collet head comprising a base at a rear end, the base having an axially extending cylindrical peripheral surface;
• and
• a finger portion comprising at least two bulge portions at a forward end of the collet, each bulge portion comprising an outer bulge surface and an inner bulge surface, the outer bulge surface having an axially extending cylindrical shape and the inner bulge surface laying on a forwardly tapering conical surface, and
• the pusher is located in the collet with a portion of the pusher abutting a forwardly facing surface of the collet, the pusher comprising:
• a pusher body having a longitudinal pusher axis and a rear end, the pusher being configured and dimensioned to be inserted, with the pusher body's rear end leading, into the forward end of the collet;
• and
• in a locked-position of the tool assembly, the shank abuts the forward tapering portion of the cavity wall, the peripheral surface of the base abuts the cylindrical portion of the cavity wall, and the inner and outer bulge surfaces of each bulge portion abut, respectively, the head of the coupling member and the cylindrical portion of the cavity wall.

A tool assembly comprising:

• a tool holder comprising a sleeve, a collet and a pusher;
• the sleeve having a longitudinal sleeve axis and comprising a cavity having a cavity wall which opens out to a forward end thereof, the cavity wall having a forward tapering portion comprising at least three cavity planes;
• the collet having a rear end and a forward end;
• and
• the pusher comprising a pusher body having a longitudinal pusher axis and a rear end, the pusher being configured and dimensioned to be inserted, with the pusher body's rear end leading, into the forward end of the collet;
• and
• a tool having a longitudinal tool axis and comprising a tool head, a coupling member and a shank therebetween;
• the shank tapering axially rearwardly from the tool head to the coupling member and comprising at least three shank planes, the coupling member extending axially rearwardly from the shank and comprising a forwardly tapering frustoconical head,
• wherein:
• the collet is located within the cavity of the sleeve;
• the pusher is located in the collet with a portion of the pusher abutting a forwardly facing surface of the collet;
• the tool is removably secured to the tool holder via the forward end of the collet, with an inner surface of the forward end of the collet abutting the head of the coupling member and an outer surface of the forward end of the collet abutting the cavity wall;
• and
• the at least three cavity planes abut the at least three shank planes to thereby rotate the tool, upon rotation of the tool holder.