Instruction Sheet
Model SB1310
High Precision 9" Lathe Chuck
Grease fitting for
complete internal
lubrication.
Hardened steel jaws
for durability and
extreme clamping
Chucks are heavy! Get assistance when
force and grip.
installing or removing the chuck from the
lathe. Wear heavy duty leather boots for
foot and toe protection, and keep hands and
fingers away from all pinch points. Ignoring
this warning can lead to a severe crushing
injury or finger amputation!
Designed for
up to
2000 RPM.
Universal
plain-back
mounting.
Two-piece
jaws for speedy
internal/external
clamping changes.
Specifications
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OD Clamping Range. 0.43"-8.66" (11-220mm)
ID Clamping Range ..2.75"-8.27" (70-210mm)
Outer Diameter........................9.17" (233mm)
Maximum Chuck Key Torque .......101 ft/lbs*
Maximum Jaw Gripping Force ....... 6744 lbs*
Maximum Speed .............................2000 RPM
Two-Piece Hardened Steel Jaws ...............Yes
Plain Back Mounting.................................Yes
Jaw Mounting Cap Screw Torque......79 ft/lbs
Grease Fitting Lubricated.........................Yes
Cast-Iron Construction..............................Yes
Chuck Weight......................................... 45 lbs
Origin................................................... Taiwan
Manufactured
with high-tech
German CNC
machinery.
Figure 1. Features.
Installation
1. UNPLUG THE MACHINE FROM POWER!
2. Mount the back plate on the spindle.
3. Accurately measure the inside of the back
relief bore on the chuck. This dimension is
critical and should be 0.001''.
* Maximum handle torque and gripping force
is given at full jaw and scroll gear engage-
ment. If jaw and scroll gear are partially
engaged, clamping force and gripping force is
reduced.
4. Face the back plate to true it. Make passes
across the face until its entire surface has
been cut.
5. Turn a shoulder into the face 1⁄8'' deep and
0.001" to 0.002'' larger than the back relief
bore diameter. Remember that this is a press
fit. Chamfer the corner a small amount to
prevent any burrs when installing.
If you need help with your new item, contact
us at: (360) 734-1540 • FAX: (360) 676-1075
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Care & Maintenance
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6
5
!
Always disconnect
machine from power before
performing maintenance or
serious personal injury may
result.
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7
1
For optimum performance from your chuck,
follow the maintenance schedule below, and
never hammer on the chuck, jaws, or a workpiece
clamped in the chuck. Never subject the chuck to
abrasives, flame, or water.
Note: Each jaw is marked
1, 2, or 3 to correspond
to its marked slot in the
chuck.
2
Figure 2. Chuck sequence of disassembly.
Daily:
5. Using mineral spirits, clean and dry all
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Check/correct loose mounting bolts.
Keep the chuck clean and oiled.
components. Inspect all bores, teeth, pins,
and mating surfaces for wear, burrs, galling,
rust, or cracks.
Use a vacuum, rag, or brush to clean the
chuck after use. Never use air pressure to
clean chips away from a chuck.
6. Without changing the dimension of any part,
use a wire brush, emery cloth, or dressing
stones, to remove all rust, burrs, and any
high spots caused by galling.
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Avoid leaving the chuck clamped on a
workpiece, unload the chuck jaws daily.
Make sure the chuck key is removed from
the chuck when not using the key.
7. Coat all parts with any automotive NLGI #2
grease, and carefully reassemble the chuck
in the reverse order shown in Figure 2.
If the chuck ever becomes stiff to operate, it may
have been contaminated with metal chips or
abrasives from neglect or poor service practices.
The chuck must be dissembled, cleaned, and re-
lubricated.
8. Rotate the chuck key clockwise until you
see the tip of the scroll-gear lead thread just
begin to enter jaw guide #1.
To disassemble the chuck for a full cleaning
and lubrication service:
9. Insert jaw #1 into jaw guide #1, and hold the
jaw against the scroll-gear.
1. UNPLUG THE MACHINE FROM POWER!
10. Rotate the chuck key clockwise one turn to
engage the tip of the scroll-gear lead thread
into the jaw. Pull the jaw; it should be locked
into the jaw guide.
2. Mark the chuck and the mounting plate
where they mate to ensure that when
reassembled both halves line up. Next,
unbolt the chuck and separate both halves.
11. Install the other jaws in the same manner,
3. Insert and rotate the chuck key
counterclockwise until the scroll-gear has
released all three jaws.
and install a new grease fitting.
12. Line up the timing mark on the chuck and
the mounting plate, and fasten both halves
by tightening and torquing the fasteners as
outlined in Step 9 in Chuck Installation.
4. Using a basic set of metric hex wrenches
and a #1 standard screwdriver, start at #1
and disassemble the chuck in the sequence
shown in Figure 2.
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Troubleshooting
If you need replacement parts, or if you are unsure how to do any of the solutions given here, feel free
to call us at (360) 734-1540.
Symptom
Possible Cause
Possible Solution
The chuck has
hard spots or binds
completely.
1. Jaw is in wrong position.
1. Reinstall jaws in correct order and position on scroll
gear.
2. Lack of lubrication, rust, burr, or
2. Disassemble, de-burr, clean, and lubricate chuck.
metal shavings inside of chuck.
3. Broken tooth on the pinion or the
3. Disassemble and rebuild chuck.
scroll gear.
The workpiece slips
in the jaws.
1. Incorrect jaw or workpiece clamping
1. Reposition jaws and workpiece for maximum scroll
position.
gear and jaw engagement is achieved.
2. Insufficient pinion and scroll gear
2. Tighten chuck key to 101 ft/lbs.
torque.
3. Cutting overload.
3. Reduce cutting depth or feed rate.
4. Chuck is binding before full
4. Disassemble and service/rebuild chuck.
clamping is achieved.
Clamping accuracy
is poor.
1. Workpiece improperly clamped or
1. Remove jaws, clean, de-burr, and reinstall with jaw
jaw is loose or incorrectly seated.
mounting caps crews torqued to 79 ft/lbs.
2. Chuck loose, mounting is off center,
2. Remove chuck, clean and de-burr mounting, and
or it is improperly seated.
reinstall, or machine a new mounting plate.
Parts Diagram
Parts List
REF PART #
DESCRIPTION
GREASE FITTING
TOP JAW
BUTTON HD CAP SCR M6-1 X 16
BACK COVER
LOCK PIN
PINION
SCROLL GEAR
CHUCK KEY W/SPRING
COMPRESSION SPRING
CAP SCREW M12-1.75 X 90 BLK C12.9
CAP SCREW M12-1.75 X 25 BLK C12.9
HEX WRENCH 10MM
BOTTOM JAW SET OF 3
CHUCK BODY
3
1
PSB1310001
4
2
3
PSB1310002
PCAP115M
7
4
5
PSB1310004
PSB1310005
PSB1310006
PSB1310007
PSB1310008
PSB1310009
PSB1310010
PSB1310011
PAW10M
8
5
6
9
6
7
8
9
10
11
12
13
14
15
10
15
13
14
1
PSB1310013
PSB1310014
PSB1310015
11
12
HEX BOLT M12-1.75 X 40 BLK C12.9
2
Please Note: We included this breakdown for service purposes only. Since many of the parts shown are machined to each
individual chuck, they are not available as replacement items.
Copyright © January, 2010 By South Bend Lathe Co.
WARNING: No portion of this manual may be reproduced in any shape or form
without the written approval of South Bend Lathe Co.
#CR12486 Printed in Taiwan.
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