105-0717-006 12
SCREW DEPTH
: The screw provides 19mm (3/4 inch) of thread
beyond the PowerGrip jaws. With all wood blocks over 150mm (6
inches) in diameter the full thread depth of 19mm should be used.
Irregular, rough tree blanks (e.g. small sections of tree limbs) not
exceeding the above sizes can be held quite firmly BUT caution must
be exercised. Check for adequate contact.
CAPACITY
: DO NOT USE THE SCREW FOR VERY LARGE WOOD
BLANKS. Its use is intended for small bowl and screw chucking work.
The maximum capacity which should be mounted on the screw -
250mm (10 inches) diameter x 100mm (4 inches). DO NOT EXCEED
600 RPM FOR THIS OPERATION. Use tailstock support.
PREPARATION
: The 10.5mm thread requires a drilled hole about
8mm (5/16”) in diameter. The screw has considerable holding power
and it is sometimes difficult to unscrew, so wax or oil the thread before
mounting the wood. CARE: The threads are fine and can be damaged
by misha
ndling. DON’T hammer into wood! DO screw into a pre-
drilled hole. Any nicks on the threads can be removed by carefully
filing.
EXPANDING DOVETAIL OPERATION
Expansion of the jaws into a recess. This function is for bowl and
platter turning where the projection (depth) of the wood blank is not too
great i.e. up to 150mm (6 inches). Characteristically these items have
a parallel wood grain. IT MUST NOT BE USED FOR ANY LONG
WORK (OVER 150MM) AS THERE WOULD BE GREAT DANGER OF
WOOD TEARING OUT AND DISLODGING FROM CHUCK.
Instructions below apply to the Powergrip jaws but the general
technique is the same with other accessory jaws. However, the
maximum size of wood blank that can be mounted, the maximum
turning speed and recess size varies with the different accessory jaws.
Consult specific instructions included for each jaw set.
This strong holding method, using the power grip jaws, bowls up to
400mm (16 inches) in diameter can be turned. DO NOT EXCEED
700RPM WITH THIS OPERATION. OUT OF BALANCE STOCK
MUST BE TURNED AT THE SLOWEST SPEED POSSIBLE.
