Quick change bit holder

A method of securing a grinding sleeve to an expanding device comprising the steps of:

• placing a cylindrical member upon the rotatable shaft wherein the cylindrical member has an outer bushing unit, an interior bushing unit, an upper control unit, an expanding unit, and a locking mechanism;
• wherein the outer bushing unit receives a grinding sleeve, and has, when the locking mechanism is in an unlocked position, a first outer diameter of D, and a height H;
• wherein the interior bushing unit receives a rotatable shaft, has, when the locking mechanism is in an unlocked position, a second outer diameter of I, which is less than D, and a height J, which is less than H;
• wherein the expanding unit extends from within the upper control unit and at least portions thereof between the outer bushing unit and interior bushing unit, and the expanding unit has a first protrusion below and contacting the outer bushing unit and a second protrusion below and contacting interior bushing unit;
• wherein the locking mechanism is interconnected to the upper control unit so that when the locking mechanism is in the unlocked position, the grinding sleeve can be laced on or taken off the outer bushing unit and the device can be placed on or taken off a rotatable shaft;
• sliding the grinding sleeve upon the outer bushing unit when the locking mechanism is in the unlocked, and placing the device onto a rotatable shaft;
• positioning the locking mechanism into the locked position so the locking mechanism pulls the expanding unit towards the upper control unit and pushes the upper control unit towards the expanding unit which expands the outer diameter and shortens the height of the outer bushing unit, and expands the interior diameter and shortens the height of the interior bushing unit, which secures the sleeve to the device and the device to the rotating shaft.

A grinding sleeve holder for securing a grinding sleeve on a rotatable shaft, comprising:

• a support unit;
• a control unit;
• a sleeve locking unit adapted to engage the grinding sleeve;
• a shaft locking unit adapted to engage the rotatable shaft;
• said support unit and said control unit being arranged for cooperative manipulation of said sleeve locking unit and said shaft locking unit into respective locking engagement with the grinding sleeve and the rotatable shaft;
• and
• a locking mechanism operatively interconnecting said support unit and said control unit, said locking mechanism being adapted to effect said manipulation of said sleeve locking unit and said shaft locking unit.

In combination, a grinding sleeve and grinding sleeve holder for mounting the grinding sleeve on a rotatable shaft, comprising:

• a grinding sleeve;
• a support unit;
• a control unit;
• a sleeve locking unit adapted to engage said grinding sleeve;
• a shaft locking unit adapted to engage the rotatable shaft;
• said support unit and said control unit being arranged for cooperative manipulation of said sleeve locking unit and said shaft locking unit into respective locking engagement with said grinding sleeve and the rotatable shaft;
• and
• a locking mechanism operatively interconnecting said support unit and said control unit, said locking mechanism being adapted to effect said manipulation of said sleeve locking unit and said shaft locking unit.

A method for securing a grinding sleeve to a rotatable shaft of a grinding machine, comprising:

• selecting a grinding sleeve;
• selecting a sleeve holder comprising:
• a support unit;
• a control unit;
• a sleeve locking unit adapted to engage said grinding sleeve;
• a shaft locking unit adapted to engage the rotatable shaft;
• said support unit and said control unit being arranged for cooperative manipulation of said sleeve locking unit and said shaft locking unit into respective locking engagement with said grinding sleeve and the rotatable shaft;
• and
• a locking mechanism operatively interconnecting said support unit and said control unit, said locking mechanism being adapted to effect said manipulation of said sleeve locking unit and said shaft locking unit;
• placing said grinding sleeve on said sleeve locking unit to form a grinding sleeve unit;
• placing said grinding sleeve unit on the rotatable shaft;
• and
• actuating said locking mechanism to simultaneously lock said grinding sleeve to said sleeve locking unit and said shaft locking unit to the rotatable shaft.

In combination:

• a grinding sleeve;
• a grinding sleeve holder for securing said grinding sleeve to a rotatable shaft of a grinding machine;
• sleeve locking means on said grinding sleeve holder for locking said grinding sleeve to said grinding sleeve holder;
• shaft locking means on said grinding sleeve holder for locking said grinding sleeve holder to the rotatable shaft;
• and
• actuating means for simultaneously effecting locking engagement of said sleeve locking means to said grinding sleeve and of said shaft locking means to the rotatable shaft.

A grinding sleeve holder for securing a grinding sleeve on a rotatable shaft, comprising:

• grinding sleeve locking means for locking the grinding sleeve to the grinding sleeve holder;
• shaft locking means for locking the grinding sleeve holder to the rotatable shaft;
• and
• actuating means for simultaneously effecting locking engagement of said grinding sleeve locking means to the grinding sleeve and of said shaft locking means to the rotatable shaft.