Teknatool NOVA PRO-TEK G3 CHUCK - Screw Chuck - Woodworm Screw; Woodworm Screw Installation and Use; Forming a Spigot or Recess; Turning on a Spigot or Dovetail

SCREW CHUCK - WOODWORM SCREW
The woodworm screw (screw chuck) provides a convenient method for holding a bowl blank
to cut a recess to mount on the PRO-TEK G3 50mm (2in) jaws.
Jaws must be mounted on the chuck before the wood worm screw – See diagram
Open the jaw slide and insert the wood
worm screw in the centre hole of the
chuck.
Position the woodworm screw as shown
in illustration
.
Note:
All 4 flat sides of the wood worm
screw should be in contact with the flat
end of the jaw slides.
The wood worm screw is used to secure the wood to
cut either a recess or spigot on the open
‘face’ end.
Pre
-
drill a hole of size 8mm (5/16in) diameter with
19mm (3/4in) depth to mount the blank using the
woodworm screw.
The wood must be seated firmly and
flat against the top surface of the mounted jaws.
For
first stage rounding of bowl blanks; extra support can
be used with live centre support from the lathe
tails
tock. See full manual online for more details.
DO NOT USE WOOD BLANKS LARGER THAN 250mm
DIAMETER X 100mm DEPTH (10inx4in)
DO NOT EXCEED 600RPM
TURNING ON A SPIGOT OR DOVETAIL
Spigot is where the jaw contracts onto the workpiece to grip.
This is mainly for box, goblet and vase turning (End grain items
with a fair degree of overhang).
EXTREME CAUTION WITH THIS OPERATION MUST BE
EXERCISED. DO NOT EXCEED 850 RPM FOR THIS OPERATION.
Spigot Diameter (For 50mm Jaws)
Min Diameter
Max Diameter
Cylinder
45mm (1 3/4in)
65mm (2 9/16in)
Square
40mm (1 9/16in)
50mm (2in)
Dovetail is where the jaw expands into a recess of a workpiece
to grip. This operation is mainly for bowl and platter (Items with
parallel wood grain).
MUST NOT BE USED FOR ANY LONG WORK (OVER 100mm or
4 inches)
. DO NOT EXCEED 600RPM WITH THIS
OPERATION.
OUT OF BALANCE STOCK MUST BE TURNED AT THE SLOWEST
SPEED POSSIBLE.
Recess Dovetail Diameter (For 50mm Jaws)
Min
Max
50mm (2in)
70mm (2 3/4in)
FORMING A SPIGOT OR RECESS
Recess
Spigot
Using a Nova Dovetail Chisel #6008 (or any
other suitable tool), cut into the wood
, rest the
flat side of the chisel on the bottom surface of
the recess to form a profile of between
75~80deg with 10mm (25/64in) depth.
Using a suitable chisel, turn the outer
diameter of the wood to form the spigot. The
length of the spigot should match
the internal
height of the jaws.
CONTACT
● Teknatool International Ltd Phone: (+64) 9 477 5600 ● Teknatool USA Phone: 727-954-3433 CUSTOMER SOLUTIONS For all worldwide Inquiries, Repairs or Services (issues must be in writing) Email: Service@Teknatool.com
Or you can contact the retailer where you purchased your NOVA Chuck, for the contact details please see our website www.teknatool.com
NEW AND IMPROVED FEATURES
• Rust resistant nickel-plated body for longer protection and less
maintenance.
• Stronger and more versatile PRO-TEK 50mm (2in) Jaws. Dovetail and
serrated internal profile for maximum holding power.
• Right hand, standard clockwise scroll tightening for ease of use. • Easier to read, laser etched numbering on edge of PRO-TEK 50mm
(2in) jaws.
• Fastener upgrade to Nova Star head jaw screws. No-slip star head
for positive T-
bar handle location and better tightening power. Star
profile to minimize strip out of screw heads
• Nova Star head T-
bar Handle for easy grip and quicker tightening of
screws
• Sliding T-bar Chuck scroll key to enable easier jaw operation. Designed and manufactured by
Teknatool International, USA and PRC © 2020 Teknatool
nova
TM
PRO-TEK
G3 CHUCK
REF#
QTY.
PART#
DESCRIPTION
1
1
48206, 48239, 1359011
PRO-TEK G3 Body
2
1
1359010
Pinion T-Handle
3
1
23109
Scroll ring right hand
4
1
23051, 23051E
Jawslide #1
5
1
23052
Jawslide #2
6
1
23053
Jawslide #3
7
1
23054
Jawslide #4
8
1
EC48, EC50
Circlip
9
1
NS1000
Fibre (Washer) WAD
10
1
G0606
Grub Screw
11 8 CM5010182
NOVA Star head screws -
C/Sunk
12
1
10006
Woodworm screws
13
1
13049
Star head screw T-handle
14
1
AK3
Allen Key 3mm
15
1
6075
PRO-TEK 50mm (2in) Jaws
ACCURACY
The PRO-TEK Chucks are sample tested from each batch
and are made to run within the following tolerance limits
on the PRO-TEK 50mm (2in) jaws:
-
Maximum Face/Axial Runout: 0.08mm (0.0031 in)
-
Maximum Radial Runout: 0.15mm (0.0060 in)
However, wood is a flexible material with varying densities
and liable to warp while turning.
Under these circumstances pursuing accuracies as above,
measured on the wood project clamped in the chuck, can be
very difficult to achieve. For most wood turning projects
there is usually little requirement to achieve such tolerances.
See trouble shooting guide for detailed guide on accuracy
in full PRO-TEK manual online at www.teknatool.com
WARRANTY
Your Nova PRO-TEK Chuck is covered by a 6-year Limited Warranty. Go to www.teknatool.com for a full warranty statement in full version manual PRO-TEK
G3 Chuck. The full online manual also covers trouble shooting, maintenance, list of Nova lathe spindle thread inserts, jaw and chuck accessories.
Optional Accessory Jaws
Chuck is compatible with all nova jaws
including
the jaws shown above
.
Note:
Excluding jaws that are specific for Nova
Titan chucks
Make sure this flat face is
coming in contact with the
tip of the jaw slide
Side to cut
recess or
spigot
Chuck Gripping
Direction
(Spigot)
Chuck Gripping
Direction
(Dovetail)
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