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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.
#CR12486 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 101 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 79 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 PSB1310001 GREASE FITTING
2 PSB1310002 TOP JAW
3 PCAP115M BUTTON HD CAP SCR M6-1 X 16
4 PSB1310004 BACK COVER
5 PSB1310005 LOCK PIN
6 PSB1310006 PINION
7 PSB1310007 SCROLL GEAR
8 PSB1310008 CHUCK KEY W/SPRING
9 PSB1310009 COMPRESSION SPRING
10 PSB1310010 CAP SCREW M12-1.75 X 90 BLK C12.9
11 PSB1310011 CAP SCREW M12-1.75 X 25 BLK C12.9
12 PAW10M HEX WRENCH 10MM
13 PSB1310013 BOTTOM JAW SET OF 3
14 PSB1310014 CHUCK BODY
15 PSB1310015 HEX BOLT M12-1.75 X 40 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.