Southbend Lathe SB1314 User Manual

Instruction Sheet  
Model SB1314  
High Precision 6" 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  
4000 RPM  
Universal  
plain-back  
mounting  
Two-piece  
jaws for speedy  
internal/external  
clamping changes  
Specifications  
Four chuck  
alignment set  
screws  
OD Clamping Range...0.32"-6.30" (8-160mm)  
ID Clamping Range ..2.17"-5.90" (55-150mm)  
Outer Diameter........................6.57" (167mm)  
Maximum Chuck Key Torque .........65 ft/lbs*  
Maximum Jaw Gripping Force ....... 6744 lbs*  
Maximum Speed .........................4000 RPM**  
Two-Piece Hardened Steel Jaws ...............Yes  
Plain Back Mounting.................................Yes  
Jaw Mounting Cap Screw Torque......29 ft/lbs  
Grease Fitting Lubricated.........................Yes  
Steel Construction .....................................Yes  
Chuck Weight......................................... 22 lbs  
Origin................................................... Taiwan  
Figure 1. Features.  
Installation  
1. DISCONNECT LATHE 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 achieved at full jaw and scroll gear engage-  
ment only.  
4. Face and true the diameter of the back plate.  
Make passes across the face until its entire  
surface has been cut.  
** The maximum speed above is ONLY possible  
when the chuck jaws and the workpiece are in  
complete rotational symmetry, and when the  
workpiece is within safe weight limits for the  
lathe and chuck.  
5. Turn a shoulder that is 0.015'' smaller in  
diameter than that of the chuck relief bore.  
The shoulder height must also be tall enough  
so when the chuck is mounted and is being  
aligned, the chuck alignment screws have a  
surface to jack against.  
If you need help with your new item, contact  
us at: (360) 734-1540 FAX: (360) 676-1075  
-1-  
 
Mfg. Since 3/10  
Model SB1314  
I N S T R U C T I O N S  
Care & Maintenance  
3
6
5
!
Always disconnect  
machine from power before  
performing maintenance or  
serious personal injury may  
result.  
4
7
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.  
1
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:  
Check/correct loose mounting bolts.  
Use a vacuum, rag, or brush to clean the  
chuck after use. Never use air pressure to  
clean chips away from a chuck.  
5. Using mineral spirits, clean and dry all  
components. Inspect all bores, teeth, pins,  
and mating surfaces for wear, burrs, galling,  
rust, or cracks.  
Wipe the chuck down with a thin coat of way  
oil to prevent surface rust.  
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.  
Grease the chuck fitting with one to two  
pumps of NLGI #2 grease.  
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.  
7. Coat all parts with any automotive NLGI #2  
grease, and carefully reassemble the chuck  
in the reverse order shown in Figure 2.  
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  
1. DISCONNECT LATHE FROM POWER!  
jaw against the scroll-gear.  
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.  
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.  
3. Insert and rotate the chuck key  
counterclockwise until the scroll-gear has  
released all three jaws from the chuck.  
11. Install the other jaws in the same manner,  
and install a new grease fitting if ball or  
nipple leak grease.  
4. Using a 4mm and 6mm hex wrench, a #1  
standard screwdriver, and a ratchet with a  
7mm socket, start at #1 and disassemble the  
chuck in the sequence shown in Figure 2.  
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 11 in Installation.  
-3-  
 
Model SB1314  
Mfg. Since 3/10  
I N S T R U C T I O N S  
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  
2. Disassemble, de-burr, clean, and lubricate chuck.  
metal shavings inside of chuck.  
3. Broken tooth on the pinion or the  
3. Disassemble, replace broken parts if possible, and  
scroll gear.  
reassemble chuck.  
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 65 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 is improperly clamped or  
1. Remove jaws, clean, de-burr, and re-install with jaw  
jaw is loose or incorrectly seated.  
mounting caps crews torqued to 29 ft/lbs.  
2. Chuck loose, mounting is off center,  
2. Remove chuck, clean and de-burr mounting, and re-  
or it is improperly seated.  
install, or machine a new mounting plate.  
Parts Diagram  
Parts List  
REF PART #  
DESCRIPTION  
GREASE FITTING  
3
1
PSB1314001  
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
PSB1314002  
PCAP33M  
TOP JAW  
CAP SCREW M5-.8 X 12  
BACK COVER  
LOCK PIN  
PINION  
4
PSB1314004  
PSB1314005  
PSB1314006  
PSB1314007  
PSB1314008  
PSB1314009  
PCAP171M  
PCAP172M  
PAW08M  
PSB1314013  
PSB1314014  
PB174M  
7
8
5
6
9
SCROLL GEAR  
17  
CHUCK KEY W/SPRING  
COMPRESSION SPRING  
CAP SCREW M10-1.5 X 80 BLK C12.9  
CAP SCREW M8-1.25 X 20 BLK C12.9  
HEX WRENCH 8MM  
BOTTOM JAW SET OF 3  
CHUCK BODY  
HEX BOLT M10-1.5 X 35 BLK C12.9  
SET SCREW M12-1.75 X 10  
FLANGE PIN  
16  
15  
10  
14  
1
11  
13  
12  
2
PSS108M  
PSB1314017  
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 © March, 2010 By South Bend Lathe Co. Revised February, 2011 (CR)  
WARNING: No portion of this manual may be reproduced in any shape or form  
without the written approval of South Bend Lathe Co.  
#CR12663 Printed in Taiwan.  
-4-  
 

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