Southbend SB1231 Manual

A SERVICE OF

next previous

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.

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Mfg.Since5/10

Model SB1231

INSTRUCTIONS