NOVA 10006 Chuck Woodworm Screw

The NOVA 10006 Chuck Woodworm Screw provides a quick and easy method to mount small bowls blanks. The Nova 10006 Chuck Woodworm Screw provides a secure mounting to form the outside of bowls.
The strong thin edged thread form is designed to cut into wood and hold on and the square shank allows for strong and positive location into the chuck body.
Suitable for Nova Chucks.

This is a convenient mounting method. The woodworm screw is purpose-designed for screw chucking. It is a cylindrical screw which maintains its full holding power along the whole length, unlike normal tapered screws. The thin thread form is specially designed to cause minimum damage to wood fibres. They grip better than screws with thicker threads because there is a larger volume of undamaged wood retained within the screw. The woodworm screw is made complete with the boss section in one piece. It is designed to be used with the 50mm jaws remaining in place on the chuck. This facility is very convenient for remounting work directly onto the jaws after the screw is removed. To convert to this operation, place the boss section into the centre of the chuck making sure flat shanks are aligned to the jaw slides and close jaws around it. BEFORE FINAL TIGHTENING
MAKE SURE THAT THE FRONT OF THE BOSS SECTION OF THE SCREW IS SEATED BEHIND AND AGAINST THE 50mm JAWS. This will prevent any tendency for the boss section to creep forward when the screw is being used.

SCREW DEPTH:

The screw provides 19mm (3/4 inch) of thread beyond the 50mm 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 mishandling. DON’T hammer into wood! DO
screw into a pre-drilled hole. Any nicks on the threads can be removed by careful filing.