Grizzly Lathe T10808 User Manual

MODEL T10808  
WOOD LATHE CHUCK SET  
INSTRUCTIONS  
For questions or help with this product contact Tech Support at (570) 546-9663 or [email protected]  
Introduction  
Inventory  
Description:  
The T10808 234" Wood Lathe Chuck Set includes  
a scroll chuck with four self-centering bottom jaws  
and five top jaw sets to provide a variety of grip-  
ping needs for your wood turning projects.  
Qty  
A. T-Handle Hex Wrench 3mm....................... 1  
B. Spindle Lever 8mm .................................... 1  
C. Woodworm Screw ...................................... 1  
D. Lathe Chuck Key 8mm............................... 1  
E. Chuck Body................................................ 1  
F. Pin Jaws..................................................... 4  
G. #2 Round Jaws........................................... 4  
H. Grip Studs 18mm, M6-1 x 6 ....................... 8  
I. Flat Jaws .................................................... 4  
J. #1 Step Jaws.............................................. 4  
K. Grip Studs 13mm, M6-1 x 6 ....................... 8  
L. Cap Screws M4-.7 x 8................................ 8  
M. #3 Round Jaws........................................... 4  
N. Hex Wrench 4mm....................................... 1  
Specifications  
Chuck Body Diameter ...................................234  
"
Chuck Bore...........................................1" x 8 TPI  
Outside Grip Range:  
— #1 Step Jaws .............................. 332" – 58  
— #2 Round Jaws ......................... 118"–134  
— #3 Round Jaws .........................214"–238  
— Pin Jaws.........................................14" – 78  
Inside Grip Range:  
"
"
"
"
— #1 Step Jaws (Upper Step)..........34"–114  
— #1 Step Jaws (Lower Step).......112"–218  
— #2 Round Jaws .........................112"–218  
— #3 Round Jaws .........................278"–338  
— Pin Jaws....................................1516"–112  
Flat Jaws Maximum Outside Diameter ........ 438  
"
"
"
"
"
"
D
E
C
B
A
Flat Jaws Minimum Inside Diameter ............2116"  
Woodworm Screw Required Hole ...........14" x 78  
F
H
G
"
I
N
To prevent personal injury, always under-  
stand and follow all safety instructions in  
your wood lathe owner's manual.  
K
J
M
L
COPYRIGHT © DECEMBER, 2013 BY GRIZZLY INDUSTRIAL, INC.  
NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE  
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.  
#TS16132 PRINTED IN CHINA  
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Safety for Chucks  
ENTANGLEMENT. Entanglement with a rotat- PROPER MAINTENANCE. All chucks must be  
ing chuck can lead to death, amputation, broken properly maintained and lubricated to achieve  
bones, or other serious injury. Never attempt to maximum clamping force and withstand the rigors  
slow or stop the lathe chuck by hand, and always of centrifugal force. To reduce the risk of a thrown  
roll up long sleeves, tie back long hair, and remove workpiece, follow all maintenance intervals and  
any jewelry or loose apparel BEFORE operating.  
instructions in this document.  
CHUCK SPEED RATING. Excessive spindle DISCONNECT POWER. Serious entanglement or  
speeds greatly increase the risk of the workpiece impact injuries could occur if the lathe is started  
or chuck being thrown from the machine with while you are adjusting, servicing, or installing the  
deadly force. Never use spindle speeds faster than chuck. Always disconnect the lathe from power  
the safe limits of your chuck and workpiece.  
before performing these procedures.  
USING CORRECT EQUIPMENT.  
Many TOP JAW TYPES. Mixing top jaw types will create  
workpieces can only be safely turned in a lathe if an unbalanced and off-center load that could fly  
additional support equipment, such as a tailstock from the lathe and cause personal injury or prop-  
center, is used. If the operation is too hazardous erty damage. Use all four top jaws of the same  
to be completed with the lathe or existing equip- type when securing workpiece.  
ment, the operator must have enough experience  
to know when to use a different machine or find a POWER TOOLS. Do not use power tools on cap  
safer way.  
screws or grip studs, which can easily damage the  
threads and cause the component to fail during  
TRAINED OPERATORS ONLY. Using a chuck operation. A workpiece or chuck component not  
incorrectly can result in workpieces coming properly secured can fly off during operation and  
loose at high speeds and striking the operator or cause serious personal injury.  
bystanders with deadly force. To reduce the risk of  
this hazard, read and understand this document TENON/RECESS SIZE. Size the tenon or recess  
and seek additional training from an experienced properly and choose the correct jaw configuration  
chuck user before using a chuck.  
so that there is the greatest possible amount of  
surface contact between jaws and workpiece. The  
CHUCK CAPACITY. Avoid exceeding the capac- greater the surface contact, the greater the grip-  
ity of the chuck by clamping an oversized work- ping power!  
piece. If the workpiece is too large to safely clamp  
with the chuck, use a faceplate or a larger chuck FLAT JAWS. Flat jaws (or cole jaws) provide the  
if possible. Otherwise, the workpiece could be least gripping power of the jaw types. Always use  
thrown from the lathe during operation, resulting in slow speeds when using flat jaws.  
serious impact injury or death.  
SAFETY SET SCREW. The safety set screw  
CLAMPING FORCE. Inadequate clamping force under bottom jaw #4 prevents the jaws from mov-  
can lead to the workpiece being thrown from the ing beyond safe engagement with the scroll gear.  
chuck and striking the operator or bystanders. If this should happen, the jaws and workpiece  
Maximum clamping force is achieved when the could fly off the chuck during operation resulting  
chuck is properly maintained and lubricated, all in serious personal injury to operator or bystand-  
jaws are fully engaged with the workpiece, and ers. Always make sure this set screw is properly  
the maximum chuck clamping diameter is not installed and tightened when using the chuck.  
exceeded.  
-3-  
Model T10808 Wood Lathe Chuck Set  
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Mounting Jaws  
1. Clean top and bottom jaws with mineral spir-  
its. When dry, apply a thin coat of ISO 32 or  
equivalent oil to the mating surfaces.  
The safety set screw under bottom jaw  
#4 (shown below) prevents the jaws from  
moving beyond safe engagement with the  
scroll gear. Unsecured jaws could fly off the  
chuck during operation resulting in serious  
personal injury to operator or bystanders.  
Always make sure this set screw is prop-  
erly installed and tightened when using the  
chuck.  
2. Place top jaws on bottom jaws so alignment  
rings (see example below) fit into alignment  
slots and screw holes are aligned.  
Note: Make sure stamped numbers of chuck  
jaw guide, bottom jaw, and top chuck corre-  
spond with each other to ensure jaws safely  
and evenly grip workpiece.  
Jaw on Side  
for Clarity  
Alignment  
Safety  
Set Screw  
Ring  
Mounting Chuck  
It is important that the chuck is properly mounted  
to the lathe to ensure safe and accurate turning  
(see the example below).  
Alignment Slot  
3. Apply a thin coat of ISO 32 or equivalent oil  
to cap screw threads to prevent screws from  
seizing under operational forces.  
4. Thread the cap screws through the top jaws  
into the bottom jaws and finger tighten them,  
then back them off 14 turn.  
5. Use chuck key to converge jaws to the center  
so they are evenly up against one another  
and even in height.  
6. Fully tighten cap screws—do not overtighten.  
7. Check jaw alignment. They should be evenly  
up against one another with no gaps and  
even in height.  
—If this is not the case, repeat this procedure  
until they are.  
-4-  
Model T10808 Wood Lathe Chuck Set  
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To mount the chuck onto the lathe:  
Chuck Types  
The best jaw type to use is the one that will pro-  
vide the greatest contact between the jaw and the  
workpiece—this provides the best gripping power!  
1. DISCONNECT LATHE FROM POWER!  
2. Thoroughly clean threads of spindle and  
chuck bore with mineral spirits and a stiff  
brush.  
Round Jaws  
Round jaws (or dovetail jaws) are typically either  
closed around a tenon (or foot) turned on the bot-  
tom of a bowl, or they are expanded into a recess  
cut into the workpiece. The tenon is later removed  
with the workpiece mounted on the flat jaws.  
3. Properly mount top jaws onto bottom jaws.  
4. To prevent chuck binding to spindle under  
operational forces, apply a thin coat of ISO  
32 or equivalent oil to spindle threads.  
A dowel workpiece can also be fed through the  
center of the chuck and spindle bore, and gripped  
with center surfaces of the jaw flats. As each  
piece is turned and cut off, the dowel can be  
advanced for the next piece.  
5. Thread chuck onto spindle and hand tighten.  
It should screw on without binding or exces-  
sive play.  
6. Lock spindle in place.  
The #2 round jaws have a slight dovetail profile. If  
a matching profile is cut into the recess, the jaws  
can expand with much greater gripping power.  
7. Back chuck off slightly, then quickly rotate  
chuck onto spindle. This will firmly seat the  
chuck.  
#2 Round Jaws  
Indexing  
The chuck back plate has indents and num-  
bers for performing indexing operations. Indexing  
allows the circumference of the workpiece to be  
divided into equal segments.  
An indexing arm (not included) is required to take  
advantage of this feature. Research books and  
the internet to better understand the process,  
what is required, and how to perform indexing  
operations.  
The #3 round jaws can hold much larger  
workpieces than the #2 round jaws and have  
ridges that press into the wood for a better grip.  
#3 Round Jaws  
When mounting workpiece on jaws, do not  
contact workpiece with the lower flat of  
jaws. This provides better gripping power  
and avoids any inconsistencies between  
surfaces that would interfere with true rota-  
tion.  
-5-  
Model T10808 Wood Lathe Chuck Set  
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#2 Round Jaws:  
Pin Jaws  
Outside Grip Range ............................. 118"–134  
Inside Grip Range ................................112"–218  
"
"
Pin jaws are typically used to expand into a deep  
recess cut into a bowl-shaped workpiece for initial  
roughing of the outside and tenon (or foot).  
#3 Round Jaws:  
Outside Grip Range ............................. 214"–278  
Inside Grip Range ................................278"–338  
"
"
When used to grip the inside of a recess, the  
advantage to pin jaws over step or round jaws is  
that they offer a lot of surface area for gripping.  
They also have ridges on the outside for greater  
gripping power. The disadvantage is that the  
recess must be fairly deep. However, this is usu-  
ally cut into the waste portion of the workpiece  
and removed later.  
Round Jaws  
(2 jaws removed for clarity)  
The smooth center surface of the pin jaws can  
also grip externally around a small tenon on  
objects such as Christmas ornaments, wooden  
tops, lace bobbins, or other delicate work without  
marring the workpiece.  
Outside  
Tenon Grip  
Inside  
Recess Grip  
Outside Grip Range ..................................14" – 78  
Inside Grip Range ................................1516"–112  
"
"
Pin Jaws  
(2 jaws removed for clarity)  
Inside  
Recess Grip  
Small  
Diameter  
Workpiece  
-6-  
Model T10808 Wood Lathe Chuck Set  
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Step Jaws  
Flat Jaws (or Cole Jaws)  
The step jaws have two outside profiles of differ-  
ent circumferences designed to expand into the  
recess cut into the workpiece. The surfaces of the  
jaws have ridges that push into the wood which  
increases the gripping power.  
Used with included grip studs, flat jaws are pri-  
marily used to finish the bottom of a bowl-type  
workpiece (see examples below). The included  
studs are 13 and 18mm in height and are rubber  
coated to prevent marring. Use the stud set and  
configuration that has the most surface contact  
with the workpiece.  
The center surfaces of the step jaws are ridged  
and can grip a dowel-type workpiece from the  
outside that is fed through the chuck and spindle  
bore.  
Basically, step jaws combine the capabilities of  
the round jaws and the pin jaws, but are much  
more versatile than either of those jaws alone.  
Upper  
Step  
Flat Jaws Maximum Outside Diameter ........ 438  
"
Flat Jaws Minimum Inside Diameter ............2116"  
Lower  
Step  
Flat Jaws  
Grip  
Stud  
Outside Grip Range ............................... 332" – 58  
Inside Grip Range:  
"
— Upper Step...................................34"–114  
— Lower Step................................112"–218  
"
"
Workpiece  
Step Jaws  
(2 jaws removed for clarity)  
(Top View)  
Grip  
Inside  
Recess Grip  
Stud  
Outside Grip  
(Side View, Outside Grip)  
Grip  
Stud  
(Side View, Inside Grip)  
-7-  
Model T10808 Wood Lathe Chuck Set  
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Woodworm Screw  
Bottom Jaw Removal & Installation  
The woodworm screw is typically used with the  
#2 round jaw set for holding small items. Refer to  
the illustration below for closing the round jaws  
around the base of the screw.  
If it is necessary to remove the bottom jaws for  
maintenance or replacement, follow these steps  
to ensure the jaws will safely and evenly grip  
workpieces.  
To remove the bottom jaws:  
Woodworm Screw  
1. Remove top jaws.  
2. Using chuck key, bring bottom jaws together  
in center of chuck. This will provide access to  
safety set screw.  
3. Remove safety set screw under bottom jaw  
#4 (see below) and set it aside.  
The woodworm screw has a very coarse 45°  
thread that provides a positive grip in the wood.  
Using the woodworm screw is an easy way to  
mount a blank workpiece, but does not provide the  
gripping power that the other jaws do. For heavy,  
unbalanced workpieces or ones that require more  
gripping power, use one of the jaw types or screw  
the workpiece to a faceplate.  
Safety  
Set Screw  
When using the woodworm screw, make sure the  
workpiece is as round as possible, then drill a 14  
x ⁄8" hole in the waste portion of the workpiece.  
Thread the workpiece onto the screw until it is  
seated firmly against the chuck.  
"
4. Insert chuck key and rotate it counterclock-  
wise to move the bottom jaws away from  
center of chuck.  
7
5. Remove jaws one by one as they disengage  
from the scroll gear.  
-8-  
Model T10808 Wood Lathe Chuck Set  
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To re-install the bottom jaws:  
Maintenance  
Clean and lubricate the chuck on a regular basis  
to ensure the jaws move in and out evenly, can  
be properly secured to the chuck, and provide a  
solid grip.  
1. Clean bottom jaws and jaw guides with min-  
eral spirits. When dry, apply a thin coat of ISO  
32 or equivalent oil to the mating surfaces.  
2. Make sure safety set screw is properly  
Cleaning  
installed in jaw guide #4.  
Brush chips and dust off the chuck and jaws. Do  
not use pressurized air that can drive the debris  
farther into the chuck.  
3. Rotate chuck key clockwise until you see  
the tip of scroll gear lead thread just begin to  
enter jaw guide #1 (see below).  
If resin builds up on the sliding surfaces making  
the chuck difficult to operate, soak the chuck and  
jaws for 30 minutes in mineral spirits with 10%  
ISO 32 or equivalent oil added. Drain thoroughly  
and allow to dry.  
Scroll Gear  
Lead Thread  
1
1
Locations  
May Vary  
Lubrication  
1. Apply a thin coat of ISO 32 or equivalent oil  
to all outside surfaces of bottom and top jaws,  
and chuck body.  
2. Turn the chuck upside down and remove the  
two Phillips head screws that secure back  
plate, then remove back plate (see below for  
an example).  
4. Insert bottom jaw #1 into jaw guide #1, and  
hold jaw against scroll gear.  
5. Rotate chuck key clockwise one turn to  
engage tip of scroll gear lead thread with bot-  
tom jaw. Pull the jaw; it should be locked into  
jaw guide.  
Back  
Pinion Gears  
Plate  
6. Install the remaining jaws in numerical order,  
in the same manner. If installed correctly, the  
jaws will converge evenly at center of chuck.  
—If jaws do not converge evenly, remove  
them. Make sure stamped numbers of  
bottom jaws and jaw guides match, then  
re-install jaws and make sure each one  
engages with scroll gear lead thread during  
its first rotation.  
3. Add several drops of ISO 32 or equivalent oil  
to pinion gears, then use chuck key to rotate  
scroll gear back and forth to evenly distribute  
the lubricant.  
4. Replace the back plate before using chuck in  
operations.  
-9-  
Model T10808 Wood Lathe Chuck Set  
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Parts  
1
20  
19  
3
22  
18  
17  
16  
4
21  
2
5
15  
6
14  
7
8
9
13  
10  
12  
11  
REF PART #  
DESCRIPTION  
REF PART #  
DESCRIPTION  
1
PT10808001 CAP SCREW M4-.7 X 8  
PT10808002 SET SCREW M4-.7 X 6 CONE-PT  
PT10808003 ROUND JAW #2 4-PC SET  
PT10808004 BOTTOM JAW 4-PC SET  
PT10808005 PINION GEAR  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
PT10808012 STEP JAW #1 4-PC SET  
PT10808013 PIN JAW 4-PC SET  
2
3
PT10808014 ROUND JAW #3 4-PC SET  
PT10808015 FLAT JAW 4-PC SET  
PT10808016 WOODWORM SCREW  
4
5
6
PT10808006 CHUCK BODY  
PT10808017 GRIP STUD M6-1 X 6, 18L 8-PC SET  
PT10808018 HEX WRENCH 4MM  
7
PT10808007 THREADED LOCK PIN  
PT10808008 SCROLL GEAR  
8
PT10808019 T-HANDLE HEX WRENCH 3MM  
PT10808020 LATHE CHUCK KEY 8MM CHROME  
PT10808021 GRIP STUD M6-1 X 6, 13L 8-PC SET  
PT10808022 SPINDLE LEVER 8MM  
9
PT10808009 EXT RETAINING RING 34MM  
PT10808010 INDEXING BACK PLATE  
PT10808011 FLAT HD SCR M3-.5 X 10  
10  
11  
Please Note: We do our best to stock replacement parts whenever possible, but we cannot guarantee that all parts shown here  
are available for purchase. Call (800) 523-4777 or visit our online parts store at www.grizzly.com to check for availability.  
-10-  
Model T10808 Wood Lathe Chuck Set  
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