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Copyright © March, 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.
#CR12664 Printed in Taiwan.
www.southbendlathe.com
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, burrs, or
metal shavings inside of chuck.
2.
Disassemble, de-burr, clean, and lubricate chuck.
3.
Broken tooth on the pinion or the
scroll gear.
3.
Disassemble, replace broken parts if possible, and
reassemble chuck.
The workpiece slips
in the jaws.
1.
Incorrect jaw or workpiece clamping
position.
1.
Reposition jaws and workpiece for maximum scroll
gear and jaw engagement is achieved.
2.
Insufficient pinion and scroll gear
torque.
2.
Tighten chuck key to 65 ft/lbs.
3.
Cutting overload.
3.
Reduce cutting depth or feed rate.
4.
Chuck is binding before full
clamping is achieved.
4.
Disassemble and service/rebuild chuck.
Clamping accuracy
is poor.
1.
Workpiece is improperly clamped or
jaw is loose or incorrectly seated.
1.
Remove jaws, clean, de-burr, and re-install with jaw
mounting caps crews torqued to 29 ft/lbs.
2.
Chuck loose, mounting is off center,
or it is improperly seated.
2.
Remove chuck, clean and de-burr mounting, and re-
install, or machine a new mounting plate.
1
13
12
11
8
9
7
4
3
5
2
15
14
6
REF PART # DESCRIPTION
1 PSB1313001 GREASE FITTING
2 PSB1313002 TOP JAW
3 PCAP115M BUTTON HD CAP SCR M6-1 X 16
4 PSB1313004 BACK COVER
5 PSB1313005 LOCK PIN
6 PSB1313006 PINION
7 PSB1313007 SCROLL GEAR
8 PSB1313008 CHUCK KEY W/SPRING
9 PSB1313009 COMPRESSION SPRING
11 PCAP172M CAP SCREW M8-1.25 X 20 BLK C12.9
12 PAW08M HEX WRENCH 8MM
13 PSB1313013 BOTTOM JAW SET OF 4
14 PSB1313014 CHUCK BODY
15 PB174M HEX BOLT M10-1.5 X 35 BLK C12.9
Parts Diagram Parts List
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.