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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.
#CR12483 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, burr, 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 and rebuild 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 58 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 improperly clamped or
jaw is loose or incorrectly seated.
1.
Remove jaws, clean, de-burr, and reinstall 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
reinstall, or machine a new mounting plate.
1
13
10
12
11
6
8
9
7
4
3
5
2
15
14
REF PART # DESCRIPTION
1 PSB1307001 GREASE FITTING
2 PSB1307002 TOP JAW
3 PCAP115M BUTTON HD CAP SCR M6-1 X 16
4 PSB1307004 BACK COVER
5 PSB1307005 LOCK PIN
6 PSB1307006 PINION
7 PSB1307007 SCROLL GEAR
8 PSB1307008 CHUCK KEY W/SPRING
9 PSB1307009 COMPRESSION SPRING
10 PSB1307010 CAP SCREW M10-1.5 X 70 BLK C12.9
11 PSB1307011 CAP SCREW M8-1.25 X 20 BLK C12.9
12 PAW08M HEX WRENCH 8MM
13 PSB1307013 BOTTOM JAW SET OF 3
14 PSB1307014 CHUCK BODY
15 PSB1307015 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.