Southbend SB1231 Lathe User Manual


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Chucks are heavy! Get assistance when
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!
Specifications
• OD Clamping ...... 0.69"–10.04" (17.5–255mm)
• ID Clamping .......... 3.74"–10.83" (95–275mm)
• Chuck Bore Diameter ................2.56" (65mm)
• Chuck Outer Diameter ..........11.81" (300mm)
• Maximum Speed ...........................2500 RPM*
• Mounting Type ......................... D1-8 Camlock
• Construction ..................Fine-GrainCast-Iron
• ChuckWeight .........................................80lbs
• ChuckShippingWeight .........................85lbs
• Country of Origin ................................ Taiwan
* ThemaximumspeedlistedaboveisONLY
possiblewiththechuckjawsandthe
workpieceincompleterotationalsymmetry.
Theworkpieceweightmustbewithinthe
limitsofthelathe,andtheworkpiecemass
mustbeofequaldensitythroughoutto
preventcentrifugalimbalanceorradial
runout—evenifatailstockorothersupport
isusedforadditionalsupport.
Instruction Sheet
PHONE: (360) 734-1540 • www.southbendlathe.com
MODEL SB1231
12" 4-JAW INDEPENDENT CHUCK
Copyright © October, 2010 by South Bend Lathe Co.
WARNING: No portion of this manual may be reproduced without written approval.
#CR13310 Printed in Taiwan
Figure 1. Features.
Introduction
TheModelSB1231usesadirectmountD1-8
camlocksystemwherethecamlockstudsare
directlythreadedintotothechuckbodyinstead
of being threaded into a backing plate that
isboltedtothechuck.Withoutusingaback
platetomountthechuck,thechuckjawsare
positionedclosertotheheadstockwhichgives
alongerdistancebetweenthejawsandthe
tailstock.Anotherbenefitisthatthedistance
betweenthejawsandtheoutboardspindlenose
isreduced,soifaspidersupportisusedonthe
outboardspindle,shortgunbarrelsandother
shorterworkpiecescanbeheldatbothends.
Manufactured
with high-tech
German CNC
machinery
Fine-grain cast
iron body
Hardened steel jaws
for durability and
extreme clamping
force and grip
Independent jaw
screws for each
reversible jaw
Direct
camlock
spindle
mounting
Jaw screw
retaining pin
with lock screws
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