Southbend SB1231 Lathe User Manual


  Open as PDF
of 8
 
CAUTION: During the next step, the
chuck may come off suddenly, so it
is important that you are ready to
support its weight with a chuck cradle
to prevent crushing your fingers or
dropping the chuck.
4. Usingadeadblowhammerorother
softmallet,lightlytaparoundtheouter
circumference of the chuck body to break the
chuckfreefromthecamlocksandthespindle
nosetaper.
5. Usearockingmotiontocarefullyremovethe
chuckfromthespindle.
—Ifthechuckdoesnotimmediatelycome
off,rotatethechuckapproximately60˚
andtapagain.Makesureallthemarks
onthecamsandspindleareinproper
alignmentforremoval.
Operation
Non-cylindricalpartscanbeheldandbrought
intothespindlecenterlineforfacingorboring
Theotherbenetisthatthemajorityof
workpiecescanbepositionedoutofthespindle
rotationaxisifabore(seeFigure 9)orastep
needstobecutintoaworkpieceonanoutlying
edge.Forthebestgrippossibleonodd-shaped
workpieces,oneormorejawscanalsoberotated
180°tograbmoresurfaceareaforclamping.
Ifallfourjawscannotbeusedtoholdthe
workpiece,youmustusefaceplatetoreducethe
riskofaworkpiecebeingthrown.
To clamp a workpiece in the chuck:
1. DISCONNECTLATHEFROMPOWER!
2. Installacenterinthetailstock.
3. Retracteachjawand place the workpiece
flatagainstthechuckface.
4. Slidethetailstockforward,sothetipofthe
deadcenterappliesenoughpressureagainst
theworkpiecetoholditinplace,andthen
lockthetailstockinposition.
5. Moveeachjawuntilitmakeslightcontact
with the workpiece.
Figure 8. Tightening sequence.
7.  Aftertheworkpieceisheldinplaceby
thejaws,turnthechuckbyhandandpay
attention to the workpiece alignment.
—Iftheworkpieceisnotcorrectlyaligned
foryouroperation,turnthechuckand
makefineadjustmentsbyslightly
looseningonejawandtighteningthe
opposingjawuntiltheworkpieceis
correctlyaligned(seeFigure 9 for an
example).
1
2
3
4
Hole to be
bored into
workpiece
Figure 9. Non-concentric workpiece correctly clamped
in the 4-jaw chuck.
6. FollowingthesequenceshowninFigure 8,
tighteneachjawinsmallincrementstomove
theworkpieceintotherequiredposition.
Checkfrequentlytomakesuretheintended
centerpointoftheworkpiecehasnot
wanderedawayfromthespindlecenterline
whilethejawsarebeingtightened.
-6-
Mfg.Since5/10
Model SB1231
INSTRUCTIONS
 previous next