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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
The chuck has
1. Jaw is in wrong position.
hard spots or binds
completely.
2. Lack of lubrication, rust, burrs, or
3. Broken tooth on the pinion or the
The workpiece slips
1. Incorrect jaw or workpiece clamping
in the jaws.
2. Insufficient pinion and scroll gear
3. Cutting overload.
4. Chuck is binding before full
Clamping accuracy
1. Workpiece is improperly clamped or
is poor.
2. Chuck loose, mounting is off center,
Parts Diagram
3
4
7
5
6
15
14
13
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.
WARNING: No portion of this manual may be reproduced in any shape or form
-4-
Possible Cause
metal shavings inside of chuck.
scroll gear.
position.
torque.
clamping is achieved.
jaw is loose or incorrectly seated.
or it is improperly seated.
8
9
1
11
2
Copyright © March, 2010 By South Bend Lathe Co.
without the written approval of South Bend Lathe Co.
#CR12664 Printed in Taiwan.
www.southbendlathe.com
1. Reinstall jaws in correct order and position on scroll
gear.
2. Disassemble, de-burr, clean, and lubricate chuck.
3. Disassemble, replace broken parts if possible, and
reassemble chuck.
1. Reposition jaws and workpiece for maximum scroll
gear and jaw engagement is achieved.
2. Tighten chuck key to 65 ft/lbs.
3. Reduce cutting depth or feed rate.
4. Disassemble and service/rebuild chuck.
1. Remove jaws, clean, de-burr, and re-install with jaw
mounting caps crews torqued to 29 ft/lbs.
2. Remove chuck, clean and de-burr mounting, and re-
install, or machine a new mounting plate.
Parts List
REF PART #
1
PSB1313001
2
PSB1313002
3
PCAP115M
4
PSB1313004
5
PSB1313005
6
PSB1313006
7
PSB1313007
8
PSB1313008
9
PSB1313009
11
PCAP172M
12
PAW08M
13
PSB1313013
14
PSB1313014
12
15
PB174M
Possible Solution
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 M8-1.25 X 20 BLK C12.9
HEX WRENCH 8MM
BOTTOM JAW SET OF 4
CHUCK BODY
HEX BOLT M10-1.5 X 35 BLK C12.9
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