Page 1

OPERATOR'S MANUAL
iPR OFESS I ONAL I
1/4 SHEET SANDER
DOUBLE INSULATED
Model No.
315.279840
_k WARNING: Toreduce tho riskofinjury,
the user mustread and understandthe
operator'smanual before usingthisproduct.
Customer Help Line: 1-800-932-3188
Sears, Roebuck and Co., 3333 Bevedy Rd., Hoffman Estates, IL 60179 USA
Visit the Craftsman web page: www.sears.com/cmflsman
983000-513
7-04
Save this manual for future reference
Page 2

• Warranty.......................................................................................................................................................................... 2
• Infroduction..................................................................................................................................................................... 2
• General SafetyRules.................................................................................................................................................... 3-4
• SpecificSafety Rules...................................................................................................................................................... 4
• Symbols........................................................................................................................................................................ 5-6
• Electrical.......................................................................................................................................................................... 7
• Features........................................................................................................................................................................... 8
• Assembly......................................................................................................................................................................... 9
• Operation.................................................................................................................................................................... 9-12
• Maintenance............................................................................................................................................................. 12-13
• AcceSSories................................................................................................................................................................... 13
• ExplodedView and Parts List................................................................................................................................... 14-15
• Parts Ordering/Service..................................................................................................................................... Back Page
ONE YEAR FULL WARRANTY ON CRAFTSMAN PROFESSIONAL TOOL
If theCraftsmanProfessionaltoolfails to give completesatisfactionwithinone year from date o1purchase,RETURN IT
TO THE NEAREST SEARS STORE IN THE UNITED STATES,and Searswill replace it, freeof charge.
Thiswarrantygivesyou specificlegalrights,and youmay also haveother rightswhich varyfrom stateto state.
Sears, Roebuck and Co., DopL 817 WA, Hoffman Estates, IL 60179
Thistool has many featuresfor making its use more pleasantand enjoyable.Safety, performance,and dependability
havebeen given top priorityinthe design of thisproductmakingiteasy to maintain and operate.
Page 3

WARNING:Readand understand all Instruc-
tions. Failureto follow a]] instructions listed below,
mayresultin eisctric shock,timand/orserious
personalinjury.
SAVE THESE INSTRUCTIONS
WORK AREA
• Keep your work area clean and well lit, Cluttered
benchesand dark areas invite _cc;dents.
• Do not operate power tools in explosive stmo-
spheres, such as in the presence offlammable liq-
uids, gases, or dust. Power tools createsparkswhich
may ignitethe dustor fumes,
• Keep bystanders, children, andvbltore eweywblls
operating a power tool. Distractionscan cause you to
lose control.
ELECTRICAL SAFETY
• Double Insulated tools are equipped with a polar-
ized plug (one blade is wider than the other). This
plug wi(I fit in a polarized out(st only one way. If the
plug does not fit fully in the outlet, reverse the plug.
If it still does not fit, contact • qualified eleoVldan
to install e polarized out(eL Do nat change the plug
in anyway. Double insulation[] eliminatesthe need
for the three-wire groundedpowercordand grounded
power supplysystem.
• Avoid body contact wlth grounded surfaces such
as pipes, radiators, range_, and rstrlperatore. There
Isan Increasedriskofelectricshock IfyourbodyIs
grounded.
• Don't expose power tools to rein or wet conditions`
Water enteringa power tool will Increase the riskof
erectricshock.
• Do nat abuse the cord. Never use the cord to carry
the tools or pull the plug from an outlet. Keep cord
away from heat, oil, sharp edges, or moving parts.
Replace damaged cords immediately. Damaged
cords increasethe risk of electricshock.
• When operating s power tool outside, use an outdoor
exterBIon cord marked '=W-A"or =If_. Thesecords
are ratedfor outdooruseand reducethe riskof electric
shock.
PERSONAL SAFETY
• Stay alert, watch what you are doing and use com-
men sense when operating s power tool. Do not
use tool white tired or under the influence of drugs,
alcohol, or medication. A momentof inattentionwhite
operatingpower toolsm.ayresultin seriouspersonal
injury.
• Dress properly. Do notweer loose clothing or
jewelry. Contain long hair. Keep your heir, clothing,
end gloves away from moving parts. Loose clothes,
jewelry, or long haircan be caughtinmoving parts.
• Avoidaccidental etarUng.Besure switch le off
before plugging In. Carryingtoolswithyourfinger on
the switchorpluggingin toolsthathavetheswitchon
invitesaccidents.
• Remove adjusting keys or wrenches before tuming
the tool on. A wrenchor a key that isleftattached to a
rotatingpart of the toolmay resultin persocaJiniury.
• Do not overreach. Keep proper footing end balance
at all times. Properfooting and balance en_b[asbetter
con_olofthetooSin unexpectedsituations.
• Use sefetyequipment. Nwsyewear eye protection.
Dustmask, nonskidsafetyshoes, hard hat, or hearing
protectionmust be usedfor appropriateconditions.
• Do not wear loose clothing orjewelry. Contain long
hair. Looseclothes,jewelry,or long haircan be drawn
intoair vents.
• Do not use on a ladder or un_d_ablesupport. Stable
footing on a solid surfaceenab)esbetter con_ol ofthe
tool in unexpectedsituations.
TOOL USE AND CARE
• Use clamps or other practical way to secure and
support the workplece to a stable platform. Holding
thework byhand oragainst your body is unstableand
may lead to lossof centroL
• Do not force too/. Use the correct tool for your ap-
plication. The correct too(willdo the job better and
setar at the ratetor whichitis designed.
• Do not cee tool if=witch does not turn it on or off.
Anytool that cannot be controlledwith the switchis
dangerousand mustbe repaired.
• Disconnect the plugfrom power source before
making any adjustments, changing accessories,
or storing the tool. Such preventivesafety measures
reduce theriskof startingthe tool accidentally.
• Store idle tools out of the reach of children and
other untrained persona. Tootsare dangerousinthe
handsofuntrainedusers.
• Mdntsln tools wtth cars. Keep cuffing tools sharp
and clean. Properlymaintainedtoolswith sharp cut-
ting edges areless likelyto bind and are easierto
control
• Check for misaitgnment or binding of moving parts,
brsekags of parts, and any othe_condition that
may effect the tool's operation. If damaged, have
the tool serviced before using. Many accidentsare
caused by poorly maintained tools.
• Use onlyaccessories that are recommended by the
manufacturer for your model. Accessoriesthat may
be su[tab(efor one too{,may become hazardouswhen
usedon another tool.
• Keep the tool end its handle dry, clean end free
from oil end grease. ANvsysuse a cleanclothwhen
cleaning. Never use brake fluids, gasoline,petToioum-
based products,or any strongsolventsto cleanyour
tool.Followingthis ruJewJflreduce theriskof loss of
control and deteriorationof the enctos6veplastic.
Page 4

SERVICE
• Tool service must be performed only by qualified
repair personnel. Serviceor maintenanceperformed
by unqualifiedpersonnelmay re,suitin a riskof injury.
• When servicing • tool, use only Identical replace-
ment parts, Followins;:ructionsin the Maintenance
section of thLsmanual. Use ofunauthorizedpartsor
failure to follow Maintenance Instructionsmay createa
riskof shock or injury.
• Hold tool byInsulated gripping surhlcse when
performing an operation where the cutting tool may
contact hidden wiring or Its own cord. Contact with
e "live"wirewillmake exposedmetal parts of the cut-
tingtool "live"and shockthe operator.
I Never use this or any power sander for wet sanding
or (io,uid polishing. Failureto comptywill increasethe
risk o#electricalshock.
• Know your power tool. Read operator's manual
carefully. Learn Its applications end limitations, as
well as the specific potential hazards related to this
tool. Followingthisrutswill reduce ths riskof electric
shock,firs,or seriousInjury.
• Always wear safety glasses. Everyday eyeglasses
have only_mpsct-re=dstsnt lenses; they ere NOT
safety glasses. Followingthisrulewil(reduce the risk
ofsedouspersonalinlury.
• Proteof your lungs. Wear e face or dust meek if the
operation Is dusty. Fallowingthisrulewi[Ireducethe
riskof serious perser_l injury.
• Protect your hearing, Wear hearing protection dur-
Ing extended Periods of operation. Followingthisrule
wiltreduce the risk of seriouspersonal injury.
• Inspect tool cords lc_icxliceHy end, ffdamaged,
have repaired at your nearest Authorized ServJca
Center. Constantly stay aware of cord location. Fol-
lowing thisrulewJilreducetherisk of eisctrJc shock or
fire.
• Check damaged parts. Before further use of the
tool, • guard or other pert that is damaged should
be carefully checked to determine that It will op-
erate properly and perform its intended function.
Check for alignment of moving parts, binding of
moving parts, breakage of parts, recur=ling,and
any other conditions that may effect It_ opera.
Uon. A guard or other part that is damaged should
be propEwlyrepaired or replaced by an authorized
service center. Followingthis rulewfffreduce the risk
of shock, fire, or seriousinjury.
• Make sure your extension cord is In good oondl-
tia_'LWhen using an extsns_oncord, be sure to use
one heavy enough to carry the current your product
will draw. Awlre gauge size {A,W.G.) of at least 16
is recommended for an extension cord I00 feet
or tess In leagth. A cord exceeding 100 feat is not
reoon'mnondod. If in doubt, use the next heavier
gaul. The =-nailer the gauge number, the he=vler
the cord. An undersized cordwJJJcauses dropin line
vol_tgsresultingInlossof powerend overheating.
• Inspect for end remove all nails from lumber before
using this tool. Followingthisrulewill reducethe risk
ofseriouspersePalInjury.
• Save these Instructions. Referto them frequentlyand
use _ to instruct othe_swho may usethistool. If
you loan someone this tool, loan them theseinstruc-
tionsa/so.
WARNING: Somadust crsatad by power sanding,sawing,grinding, drilling,end other constructionactivities
containschemicalsknownto cause cancer,birthdefects or otherreproductiveharm.Someexamples of these
chemicalsare:
• lead from lead-based, palms,
. crystallines_t(cafrom bricks and cement and othermasonry produc_s,and
• arsenicand chromiumit'om chemically-treated{umber.
Yourriskfromthese exposuresvaries,dependingon how oftenyou do thistype of work. To reduceyoursxposum
to thesechemicals:work ina well ventilatedarea, andwork with approvedSafetyequipment,such as thosedust
maskstha_arespeciallydesignedto filter out microscopic particles.
4
Page 5

Some of the following symbols may be used on this tool. Pleasestudy them and learn their meaning. Proper
interpretationof these symbolswill allow youto operate the tool batterand safer.
SYMBOL NAME DESIGNATION/EXPLANATION
V Volts Voltage
A Amperes Current
Hz Hertz Frequency(cyclesper second)
W Watt Power
rain Minutes "i3me
'%, AlternatingCurrent Type of current
,= Direct Current Typeor a chsracterLsticof current
no No Load Speed Rotationalspeed,at no load
_] ClassII Consb'uctJon Doub]e-]nsu)_tedconstruction
..Jm]n Per Minute Revolutions,strokes,surface speed, orb_setc., per minute
(_ Wet ConditionsAlert Do not exposeto rainor use in damp locations.
Read The Operator'sManual To reducethe riskofinjury, usermust read and understand
O Atwaysweer safety gogglesor safetyglasseswith aide
A Safety Alert Precautionsthat involveyour safety.
(_ Failureto keep yourhandsaway fromthe bladewillresultin
(_) Failureto keep yourhands away hornthe blade wil)resultin
O Failureto keepyour handsaway fromthe bladewi_ resuttin
,/_ No Hands Symbol Faitureto keep yourhands away from the blade wil! resuttinseriouspersonalinjury.
_) Hot Sur/ace Toreduce the riskof _n[uryor damage, avoidcontactwlthanyhot surface.
Eye Protection shieldsand a fun face shieldwhen operatingthis product.
No Hands Symbol seriouspersonalinjury.
No HandsSymbol seriouspersonalinjury.
No Hands Symbol seriouspersonalinjury.
operator'smanual beforeusingthis product.
5
Page 6

The following signal words and meanings are intended to explain the levels of risk associated with this product.
SYMBOL SIGNAL
A DANGER:
A WARNING:
A CAUTION:
CAUTION:
SERVICE
Servicingrequiresextremecareand knowledgeand
shouldbe performed onlybya qualilted servicetech-
nician.For servicewe suggest youreturnthe product to
yournearsstAUTHORIZED SERVICE CENTER for repair.
When servicing,use onlyidenticalreplacementparts.
,_ WARNING:
The operationof any power tool can resultinforeign objects beingthrownintoyoureyes,which
indicates an imminentlyi-_g.ardoussitL_tion,which, if not avoided,will
rssultindeath or seriousinjury.
|nd}catesa potentiallyhazardoussituation,which, if not avoided, could
resultin death or seriousinjury.
Indicat_ a potentiallyhazardoussituation,which, {f not avoided, may
resultinminor ormoderate injury,
(WithoutSafety Alert Symbol) Indicates a situation that may result in
propertydamage.
MEANING
A WARNING: Toavoid seriouspersonalLnjury,do
not attempt to usathisproduct untilyouread
thoroughlyand understandcompletelythe
operator'smanual. Savethis operator'smanual
and review frequently for continuingsafe opera-
tionand instructingotherswho may usethis
product.
O canresultin saverseye damage. Beforebeginningpowertooloperation,always wear eafaty
gogglesor safatyglasseswith sideshieldsand a fun face sh'leldwhen needed.We recommend
Wide VisionSafetyMask for usaovereyeglassesor standard safety glasseswith sideshields.
Alwaysuseeye protectionwhichismarked to complywithANSI Z87.1.
SAVE THESE INSTRUCTIONS
6
Page 7

DOUBLE INSULATION
Double insulationisa concept insafety in electricpower
tools, which eliminates the need for the usualthres-wlre
groundedpowercord. AJiexposedmetal partsare
isolatedfrom the internalmetal motor componentswith
protectinginsulation.Double insulatedtools do not need
to be grounded.
WARNING: The double insulated systemis
intendedto pmteot the userfrom shook resulting
from a break in the tool's internalinsulation.Observe
ell norm_ safetypresautio_s to evo{daIeotl'tce,I
shook.
NOTE: Servicingof a tool withdouble insulationrequires
extreme care and knowledge of the systemand should
be performedonlyby a qualified servicetechnician. For
service,we suggestyou return the tool toyournearest
authorrzed servicecenterfor repair.A_vaysuse original
faotory replacementpartswhen servicing.
ELECTRICAL CONNECTION
This toolhasa precLsion-builtslectYicmotor,Itshould be
connectedto a power supply that Is 120 volts, 60 Hz,
AC only (normal household current). Do not operate
this tool on directcurrent (DC). A substantialvoltagedrop
willcausea loss of powerand themotorwill overheat.If
yourtool does not operatewhen plugged into anoutlet,
double-check the power suppry.
EXTENSION CORDS
When usinga power tool at a considerabledistance from
a powersoume, be sureto use an extensioncordthat has
thecapacity to handle thecurrentthe tootwill draw. An
undersizedcordwillcausea drop in tinsvoltage,resulting
inoverheatingand lose of power,Use the ohartto deter-
minethe minimumwire size requiredinan extensioncord.
Only roundjacketed cordslistedbyUndsrwriter'sLabora-
tories(UL)shouk_be used.
Whenworkingoutdoorswith a tool, use an extension
cordthat isdesigned foroutsideuse. Thistype ofcord is
designatedwith =WA=onthe cord'siacket.
Beforeusingany extensioncord, inspect it for loose or
exposedwiresand cutor worninsulation.
•"/_mpem rating (on _o01{aCeplmte)
0-2.0 2.1-3.4 3.5-5.0 5,1-7,0 7.1-12.0 12.1-16.0
Cord Length W'weSize (A.W.G.)
25' 16 16 16 16 14 1.4
50' 16 16 16 14 14 12
100' 18 16 14 "{2 10 --
NOTE: AWG = Amedcan WireGauge
WARNING: Keepthe extension cord clearofthe
workingarea, Positionthe cordsothat itwiUnot get
caughton lumber,toolsor other obstructfonswhile
you are workingwith a powertool. Failureto do so
canresultinseriouspersonalinjury.
WARNING: Checkextensioncordsbefore each
use. If damaged repfaceImmediately.Neverusetool
with a damaged cordsincetouchingthe damaged
area couldcauseelectricalshock resu{tinginserious
Injury.
Page 8

PRODUCTSPECIFICATIONS
SizeofPaper...................................................... 1/4 Sheet
Motion..................................................................... Orbital
Orbfta[Diameter..................................................... 1/16 in.
No LoadSpeed ............................................... 14,000/min.
ON
input................................ 120 V,60 Hz, AC only,2.4 Amps
NetWeight............................................................... 3.5 tba.
Paper Type................................ Non-AdhesiveSandpaper
AdhesiveSandpaper
SWITCH
OFF
PAPER
PUNCH
KNOW YOUR SANDER
See Figure 1.
Beforeattempting to usethis product,familiarizeyourself
with aftoperatingfeatures andsafety rules.
The sanderhasa comfortablepalm grip handlethat
provides maximum one-hand control and comfortand re-
duces operator fetfgue duringuontinuouasandingopera-
tions.The sander also has quickaction paperclamps and
issuitablefor sanding with coame, medium,and fine grit
sandpaper.
DUST
BAG
PLATEN
CUSHION
SWITCH
The conveniently locatedsealed slideswitch helpskeep
out dustfor a longerlife.
PAPER PUNCH
Dustlesssanding occurswhen you use the paperpunch
to punch holesin the sandpaper priorto sanding.
DUST COLLECTION
Use eitherthedust bag includedor attach a 1-1/4 or
2-1/2 fn. vacuum hose for dustcol/ection.
8
PAPER
CLAMP
PAPER
CLAMP
LEVER
Fig. 1
Page 9

UNPACKING
Thisproducthasbeenshippedcompletelyassembled.
• Carefullyremovethe too[ and any accessories from the
box. Make surethat a_litemslisted in the packing mist
are inc)uded.
• Inspect the too[ carefullyto make sure no breakageor
damage occurred duringshipping.
• Do not discardthe packingmateris[untilyou have
carefullyinspected and satisfactorilyoperated thetool.
• If anypartsare damaged or missing, please call
1-800-932-3488 for assistance.
PACKING LIST
Sander
Dust Bag
Paper Punch
Sandpaper(1)
Operator'sManual
_k WARNING" If any partsare missingdo notoperate
thLstool untilthe missing partsare repracsd, Failure
to do so couldresult inpossiblessr[ous persosai
injury.
_ WARNING: Do notattempt to modifythis tool
or create accessoriesnot recommended for use
with thistool. Any suchatterat(on or modification Ls
misuseend couldresult ine hazardouscondition
feadiogto possibleseriouspersona[In}ury.
A WARN|NG: Donot connect to power supplyuntil
assembly iscomplete, Failuretocomplycould result
inaccidentalstartingand possibleseriousinjury.
_k WARN|NG: Donot allow familisrity with tools
to make you careless. Rememberthat a careless
fraction of a second issufficientto inflictserious
injury.
_L WARNING: Alwayswear safety gogglesor safety
glasseswith side shieldswhen operating power
tools,Failureto do so could rseultin objectsbeing
throwninto youreyes resultinginpossibleserious
injury.
INSTALLING SANDPAPER
The cushionon the sander givesyou theoptionof using
either non-adhesivesandpaperthat clamps to theplaten
or adhesive backed sandpaper with pressuresensitive
adhesive backingthatsticksto the cushion.
INSTALLING NON-ADHESIVE SANDPAPER
See Figure2.
• Unplug the sander.
• inspect sandpaper beforeinstalling.Do not use if bro-
ken or defsc_ve.
• Ifrap{acingsandpaper, removeold sandpaper. To
removepaper, release paper clamp by lifting up on
leverand disengagingitfromthe tab onthe platen.
• Insertend ofnew 1/4sheet sandpaper approximately
(1/2 inch) underthe paper clamp.
• Lift up on paper clamp (everand lock intop(ace.Apply
downwardpressureto conformsandpaper to p(atan.
• Wrap sandpaper around cushion.Lift lever on opposite
end of sander and insertlooseend ofsandpaperunder
the paper clamp.Fit sandpaper againstcushionas
fight as possible.
• Liftup on paperclampleverand lock _ntoplace.
CUSHION
NON-ADHESIVE
SANDPAPER
PAPER
CLAMP Fig. 2
LEVER
Page 10

INSTALLINGADHESIVESANDPAPER
See Figure3.
•Unp]ug thesander.
• Ifreplacingadhesivesandpaper,remove oldsand-
paperby peelingitoffcushion.Ifreplacingregular
sandpaper,relsase paper C_T_pby liftingup onpaper
cramp lever and disengagingit from the tab on the
platen.
• Remove non-adhesivesandpaper, then liftup on paper
damp lever end lock it into place.
• Carefully peel adhesivebacking from new 114sheet
sandpaper.
• Positionsandpaper, makingsure frontedge of sand-
paperisalignedwith front edge of the cushion,then
carefullypress_cky side ofsandpaper on cushion.
NOTE: Sandpapermust be a[igned with the front edge
ofthe cushionfor proper functioningoftheflush sand-
ing feature.
The cushion onthe sander ksapprox_nnately
1/4 in. smaller than precutadhesive-backedsanding
sheets. If desiredyou may want to vim off the over-
hang ofsandpaperon the back side ofcushion.The
cushion hasbeen made smallersothat multiple sheets
ofnonadhesivesandpapercan be installed.
PAPER PUNCH
See Figure4.
A paper punch template has been suppliedwith the sand-
er. Itshouldbe used for sflgning and punchingholesin the
sandpaper for alignmentwith the holes in the cushion.
Punchingthe holes propertyis a necessarystep )n order
tor the dustlessfeature of the sender to function property.
• Instattsandpaperon the sander.
• Align sander cushionto paperpunchas shown by the
iconon the paper punchtemplate.
• Pushdown on sander.
CUSHInN
ADHESIVE
SANDPAPER
Fig. 3
PAPERPUNCH
Fig.4
DUSTLESS SANDING
See Figure 5 - 6.
The dustbag providesa dust collectionsystemfor the
sander.Sandingdust is drawn up throughthe holes inthe
sandpaperend cushion and collects in thedust bag dur-
ing sanding operation.Formore effLcientoperation,empty
dust bag when halffull.
TO INSTALL DUST BAG:
• Unplugthe sander.
• Aligngrooves on dust bag with notchesonsander dust
exhaust.
• Slide dust bag onto dust exhaust.
• Turn clockwiseuntilbag looksinto place.
TO REMOVE DUST BAG FOR EMPTYING:
• Unplugthe sander.
• Turn dust bag counterclockwiseuntilit stops turning.
• Slidedust bag offsanderdustexhaust.
• Shake to empty.
10
Page 11

DUST
BAG
TO CONNECT VACUUM HOSE:
See Figure6.
When sandingfor an extended periodoftime, you can
easilyattach the dust collectionsystemof thesander to s
vaouum.
To Attach:
• Unplugthe sander.
• Remove dustbag from sander.
• Attach vacuum hoseto dust exhaust.
NOTE: Vacuum hosefits insidedustexhaust.
• Connect sander and vacuum to powersupply.
_kWARNIING: When sanderisnot connected to
vacuum,always installdust bag back onsander.
Fallurato do so could causesanding dustor foreign
obiectsto be thrown intotheface or eyeswhich
couldresult inposaibie.sariousinjury.
DUET
EXHAUST
Fig.5
SANDPAPER SELECTION
Selectingthe correctsize gritand type sandpaper is
an extremelyimportantstep inachievinga highquality
sandedfinish.Aluminumoxide,siliconcarbide, and other
syntheticabrsaivea are bestfor power sanding. Natural
abrasivessuchas flint and gernetaretoo solt for eco-
nomicaluse in powersanding.In genera[,coarse grit will
remove the most material and finer gritwillproducethe
best _nish in allsanding operations.Theconditionof the
surfaceto be sandedwilldeterminewhichgritwilldo the
job. If thesurfaceis rough,start with a coarsegritand
sand untilthe surface Isuniform.Medium grit may then
be usedto removescratchesleftbythe coarser grit a,'_d
finergritusedfor finishingof the surface.Alwayscontinue
sanding with each grituntilsurfaceis uniform.
NOTE: Do not use sanderwithout sandpaper. Doingso
willdamage the cushion.
CAUTION: Becarafutnotto letyour hand com-
pletelycoverthe air vents.
SANDING
See Fcgures7- 8.
Clamp orotherwisesecure the work to prevent it from
moving underthe sander.
,_ WARNING: Unsecuredwork couldbe thrownto-
waraLsthe operator causing in]ur_.
Hold the sander in front and away fromyou, keepingit
clear of the workpiece. Startthesanderby slidingthe
switchbutton to theON positionand lettingthe motor
buildto its maximum speed. Graduallylower the sander
on the work with a stightforward movement.Move it
slowiyusingforward end backwardstrokes.
1-1/4in.VACUUMHOSE DUSTEXHALI_r
2-1/2In.VACUUMHOSE DUSTEXHAUST
NOTE: A standard 1-1/4 in. vacuumhose connectionfits
insidethe smaller diameter hole insidethe dust exhaust,
whilea standard2-1/2 In. vacuumhose connectionfits
insidethe largerholeof thedust exhaust.
Fig. 6
Fig. 7
fl
Page 12

Donotforce.Theweightofthe unitsuppliesadequate
pressure.Let the sandpaper and sander do the work. Ap-
plyingadditional pressuresrowa the motor,rapidlywears
sandpaperand greatlyreducessander speed. Excessive
pressurewill overloadthe motor causingpossibledamage
from motor overheatingand can result ininferiorwork.
Any finishorresinon wood maysoften from thefrictional
heat. Do not allow sanding on one spot too long, as the
sander's rapidaction may remove too muchmatarial,
making the surface uneven.
The front edge o_the sander allows ftushsandingin
corners.AJwayaremovesanderfrom workptecebefore
turningthe sander.
ORBITAL MOTION
See Figure9.
Orbitalmotion is idealfor fast cuttingactionwhen remov-
ingoldfinishes,smoothingroughwood, cuttingstock
downto requireddimensions,or for finishingsurfacesto
be painted.The sandpaper movesintiny circlesat a very
highspeed, arrowingthe sanderto move easily.
Fig. 8
A WARNING: When servicing,use only identical
Craftsmanreplacement parts. Use of any other parts
may createa hazardor cause productdamage.
A WARNING: Alwayswear _ataty gogglesorsafety
glasseswith side shie/dsduringpower tooloperation
or when blowingdust. Ifoperationis dusty,also wear
a dustmask.
GENERAL MAINTENANCE
Avoid usingsolventswhen cleaning plasticparts. Most
plasticsare susceptibleto damage fromvarioustypesof
commercialsolventsand may be damaged bytheir use.
Use clean clothsto remove dirt,dust, oil, grease,etc.
WARNING: Do notat any time letbrake fluids,
gasoline,petroleum-b_Lsedproducts,penetn_ting
oils, etc., come in contactwith plasticparts.Chemi-
cals candamage, weaken or destroyplasticwhich
may resultin seriouspersonalInjury.
Fig.9
Electrictoolsused on flbargLseamaterial,wallboard,
specklingcompounds, or plastereresubjectto scsal-
statedwear and possibleprematurefaiturebecausethe
fiberglass chipsand grindingsare highlyabrasiveto bear-
ings,brushes,commutators,etc. Consequently,we do not
recommendedusingthistoolfor extendedwork on these
typesof materials. However,it youdo work with anyof
these materials,itis extremelyimportantto clean thetool
usingcompressedair.
LUBRICATION
Allof thebearingsin this toolam lubricatedwith asuffi-
cientamount of highgradelubricantfor the lifeof the unit
undernormaloperatingconditions.Therefore,nofurther
lubricationis required.
Onlythe partsshownon the parts listare intended to be
repairedor replaced bythe customer.All other parts
shouldbe replacedat a SearsServiceCenter.
12
Page 13

BRUSH REPLACEMENT
Rgure 10.
• Unp[ugthe sander.
• Remove screws (3)fl'om top coverof sander.
• Remove top cover.
• Remove clamp screws(2.).
• Removebrushtube clamps(2).
• Disconnectred and blacklead terminalsfl'om brush
tubes.
• Remove brushassemblies (2).
• Check for wear. Replace both brushassemblieswhen
e(therhas tess than 1/4 in. length of carbon remaining.
Do not replace one side withoutreplacingtheother.
• Installnew brushassemblies.Make sure curvature
of brushm_ches curvatureof motorand that brush
moves freely in brushtube.
• Reassembleby reversingthe steps listedabove.
• Tighten allscrews securely.Do not overtighten.
BLACX
LEAD
Fig._0
The following recommended accassodas arecurrentlyawitab_eat Searsretail stores:
• AluminumOxide Sheets With Paper Backing(1/4 Sheet)
X-Fine, Fine, Medium,Coarse
• Presaure-sensitTveAdhesive,Paper Backed Sheets(1/4 Sheet)
X-Fine, Fine, Medium, Coarse
• The FollowingStandard4-1/2 in.X 11 in. Sanding Sheets Can Be Cut To FitThe Sander
X-Fine, Fine,Medium, Coarse
A WARNING: Currentattanhments end accessoriesevailablafor usewith this tsof are listedabove. Do not use any
attachmentsor accessoriesnot recommendedby the manufacturerofthistool. The useofattachments oracces-
sor(esnot recommsnde_ can resultIn ser(ouspersona(injury.
13
Page 14

CRAFTSMAN 114 SHEET PROFESSIONAL DUSTLESS SANDER
MODEL NUMBER 315.279840
SEENOTEt PAGE15
f
J
11_ !.J 1.
14
Page 15

CRAFTSMAN 1/4 SHEET PROFESSIONAL DUSTLESS SANDER
MODEL NUMBER 315.279840
The model number will be found on a plate a_a_-hedto the motor housing.Always mention the model |
I
number in all correspondence regarding your PROFESSIONAL SANDER orwhen orderingrepair parts.
SEE BACK PAGE FOR PARTS ORDERING INSTRUCTIONS
PARTS LIST
Key Pad
No. Number
1 660133001
2 512486001
3 5614001
4 617800-002
5 2'30069022
6 940075047
7 940114103
8 512355001
9 968"/00-004
10 630874002
11 301123001
12 560671002
13 623019-004
14 590929001
15 631015001
16 590931002
17 617966-030
18 300027048
19 g00510001
20 590999001
w_
983000-513
Description Qty,
Screw (8-18 x 5/8 fn.)...................................................................................... 3
Top Cap ........................................................................................................... I
Screw (5-15 x 1/2 in.) ...................................................................................... 2
BrushClamp ................................................................................................... 2
Carbon Brush Assembly ................................................................................. 2
Data Plate........................................................................................................ 1
Logo Plate....................................................................................................... 1
Adapter............................................................................................................ 1
Screw (6-19 x 5/16 in.).................................................................................... 2
Retaining Plats ................................................................................................ 2
SpringClamp .................................................................................................. 2
Dust Shrefd ...................................................................................................... 1
Rubber Plug.................................................................................................... 1
Platen .............................................................................................................. 1
PJuminumPlate ............................................................................................... 1
Cushion........................................................................................................... 1
Screw (8-10 x 5/8 in.] ...................................................................................... 4
Dust Rag Assembly (Includes Key No.19)....................................................... 1
Dust B_g ......................................................................................................... 1
Paper Punch.................................................................................................... 1
Sandpaper
Operator's Manual
J
NOTE: The assembly shown representa an imporlmnt part ot the Double Insulated System. To avoid the
pomliblllty of alteration or damage to the 8]p_tem, mmttce should be performed by your nearest
Sears Repair Center. Contact your nearest Sears Reran Store for Service Center Inform'don.
*** Gomplete assortment available at your Neareat 8earn Retail Store ,
15
Page 16

Your Home
For repair- In your home- of all majorbrand appliances,
lawnand garden equipment, or heating and coolingsystems,
no matter who made it, no matter who sold itl
For the replacement parts, accessories and
owner's manuals that you need to do-it-yourself.
For Sears professional installationof home appliances
and items likegarage door openers and water heaters.
1.800-4-MY-HOME ® (l-eoo-48s-46_)
Call anytime, day or night (U.S_. and Canada)
www.lmar_com www.seara.ca
Our Home
For repair of carry-in items likevacuums, lawn equipment,
and electronics, call or go on-line forthe locationof your nearest
Sears Parts & Repair Center.
1-800-488-1222
Call anytime, day or night (U.S.A. only)
www.sears.com
To purchase a protectionagreement (U.Sa_.)
or maintenance agreement (Canada) on a productserviced by Sears:
1-800.827-6655 (u.sJ_.)
Para pedir servicio de repamcidn
a domicilio, y pare ordenar piezas:
1-888-SU-HOGAR"
(%888-784-6427)
® Reglltemd Trademmk/ _ TrademstkI aMSel_ieeMark orSeam, Roebuckmd Co.
® Marca Reglstlada/'ra MarcadieFibdca / _ Marcade Servlclode Sears,Roe_k _ _.
acMa_ue de cornrnemeJuoI_ d6p_e_edieSears,RoebuckandCo. O Sean;,Roebuckind Co.
1-800-361-6665 (Canada)
Au Canada pour service en francvais:
1-800-LE-FOYER "c
(1-800-533-6937)
www.sears.ca