LHR Technologies, Inc. CarveWright™ System (Rev 1.39) 03/02/09 33
Steel Ball (3X)
Chuck Tapered Body
Spring Loaded Cap
Tapered Bit Adapter
Bit
Tapered Interface
Groove in Bit
Cap Spring
Spring Pushes the
Cap Down and
Locks the Balls
into the Groove
Bit Adapter Removal Slot
Chuck Operation
The quick release chuck operates very similar to the quick release fitting
on an air hose. The three important parts of the mechanism are the chuck
tapered body, the chuck spring loaded cap, and the tapered bit adapter
(into which the bit is mounted). The matching tapers on the chuck body
and bit adapter are precisely machined to fit together so that the bit runs
vertical and true (Figure 24).
There are three balls located in the chuck tapered body that fit into a
groove on the bit adapter and provide the locking once the cap is forced
down by the spring. Lifting up on the spring loaded cap allows the balls to
retract into the tapered body and releases the bit assembly. The quick
release chuck can be in two different positions: the cocked position and
the bit lock position. In the cocked position, the quick change is ready to
accept a bit assembly.
Visually, it can be verified that chuck is in the cocked position by looking at
the bottom of the chuck. If the tapered body can be seen protruding from
the cap then it is cocked. Also, insert a finger into the tapered body and
feel for the balls. If they are loose and can be pushed into the tapered
body then it is in the cocked position. If the balls are locked in position
then the chuck is in the non-cocked position.
FIGURE 24: CROSS SECTION OF THE QUICK
RELEASE CHUCK
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