CRAIN 820/820V User manual

€
INSTRUCTION
MANUAL
FOR
No.
82A1820V
HEAVY.DUTY
UNDERCUT
SAW
MAR
WALLS/JAMBS TOE.SPACES
INSIDE
CORNER HANGING DOORS

OPERATINGINSTRUCTIONS
TheHeavy-Duty
UndercutSawisdesignedforundercutting
wooden
door
jambs,
moldings,
base,aswell
asmasonry
andstone,toailownewfloor
dovering5tobefitunderneath'.
Donotusethis
saw
for
sandingfloors,
cuttingmetal,
orany
other
purpose
not
describedinthisinstruction
manual.
SAFEW FIRST!Forsafeoperation,
please
taketime to
carefullyreadalltheinstructions
andrulesinthis
booklet.
SAFETYGLASSES: Alwayswear safetyglasses
when
usinga power tool. Also
use
face
ordustmaskifcutting
operationisdusty.
EARPROTECTION:
Wearear
plugs
when
using
this
saw.
BLADE
GUARD:Theblade
guard
attached
toyour
sawis
foryour
safetyandprotection.lfitbecomesdamaged,
do
not
operate
your
saw
until
ithas
been
repaired.
Alwaysleave
blade
guard
inoperating
position
when
usingthe
saw.
DOUBLE-INSULATED:
Thistoolisconstructedwith
two
separate
layers
ofelectrical
insulation.
Atool builtwiththis
insulation
systemdoesnotneed
to begrounded.
DANGEROUS
ENVIRONMENTS:Keepwork
areaclean;
clutterinvitesaccidents.Donotuse
power
tool
ondamp
orwetfloor.Besurethatthereis
good
lighting.
ACCIDENTALSTARTING:To
avoidaccidentalstarting,do
notcarrytoolwithfingers
onswitch.
CORDABUSE: Never
carry
toolsbythecordoryank the
cordto disconnect
fromanoutlet. Keep
cordsawayfrom
heat,
oil,andsharpedges.
EXTENSION
CORD:
Tominimize
power
loss
andprevent
overheating,use
maximum
of25feetlong and
16
AWG.
KEEPBLADES
CLEANANDSHARP: Usingadullblade
will
place
aheavy
load
onyour sawand
increase
thedanger
ofkickback.Forreplacement, useonlyCrain
#821
Carbide-
TippedBlade,
#805
MasonryBladeor#822DiamondBlade.
WORKINGTERMINOLOGYFisure1
Pleasereferto thediaoram belowfortheterms
used
in
thisinstructionmanual
HEIGHT
ADJUSTER
WING
NUT
DEPTH
GAUGE
ADJUSTMENT
SCALE
Figure1
THREE-ARM
KNOB

BLADEREMOVAL:
see
Fisure2
r Turn
offandunplugsaw.
Retractthe heightad-
juster
so it is flushwith
the baseto allow
clear-
ance
forwrench.
r Push the lock button
down with one hand
and insertthe span-
ner wrench into the
clamp
nut with other
hand;then
turnuntilthe
spindleengageswiththe
lock
button
(blade
stops
rotating). Figure
2
r Holdontothe plastic
housing;thenpushhard
on the
spannerwrench
counter-clockwisetoopen.lfthe
blade
is
veryhardto remove,
useavise
grip
to holdtheblade.
BLADEINSTALLATION:
seeFisure3
r Unplugthesaw.
r Alignthebladedriver's
slottothe
power
unit's
spindlecutout.
r Insertnew #821Car-
bide-TippedBlade,
#805MasonryBladeor
#822DiamondBlade
onto
thethe
spindle.
r Hand tighten the
clamp
nut
andbesure
the bladeis centered
and
fully
seated.
r Alwaysre-tightenthe
clampnutfirmlywith
the spannerwrench
beforeuse.
r Re-adjust
and check
for proper height
adjustment before
furtheruse.
HEIGHTADJUSTMENT seeFisure4
r Unplug
thesaw.
r Loosenthenutsonheightadjuster
about
11/zIo2turns
(donot backoffthewingnutsmorethannecessary).
r Adjusttheheight
of
your
bladebymovingtheheight
adjuster
upordownuntildesired
height
ofcut
is
achieved.Theinside
oftheheight adjuster
has10referencelines,inincrements
of
slsz"
(.093"),
whichisthethickness
of
the
blade.
3i,'#,fH
@{tr
No.805MASONRY
OF No.821 CARBIDE
No.822DIAMONDBLADE
CLAMPNUT ________@
''ANNERWREN
" ---ry
Figure
3

r Use these lines
as
a guide for adjust-
ment. The housing
must be set parallel
to the floor.
This is
criticalfor safetyand
straightundercutting.
The maximumheight
adjustmentis1".
r Securely tighten
the
nuts beforeuse.
DEPTHADJUSTMENT
r Depthadjuster
accurately
controlsdepthof cutfor ei-
therstraight-on
(figure
5)or
a 45" angle
(figure
6).
r Toadjust,loosenthethree-
armknob
on
the
depth
gauge
andmovethedepth
gauge
in
andoutasrequired.
r A depthgauge
adjustment
scale
is
provided
just
behind
theknobwithtwelvel/a"in-
crements
(figure
7).
r Re-tightenthe three-arm
knobfirmly
beforeuse.
r Werecommendthatyouset
thedepthof cutto no more
lhan 1/2" to minimize
the
chanceof hitting wallstuds,
nails,etc.
r Removethe depth gauge
when
cutting
inside
corners.
USING
THE
SAW:
r Makesurethe bladeclamp
nut and handle
screwsare
tightenedsecurely.
r Alwayskeepthehandleinthe
vertical
position
for general
undercutting.
r Turnthe handle
awayfrom
thetoe kickfor undercutting
toespaces
(see
figure
8).
r Plug-inthe saw and grasp
handlefirmly. Depressthe
safety
lockbutton,thenpull
thepower
switch.
HEIGHTADJUSTER , BOTT9M
EDGE
Figure
4
Figure
5
A
t
IiBff-^^"
hil,'
(l
h"
LINE IS 1,/..
Figure6
Figure7
Figure
8

r To
start
acut,
usethewalltopush
the
blade
quard
back
andexpose
blade. DONOI USEYOURHAND!
r Plungeto appropriate depth. Alwaysmovethe saw
fromleft
to right
only.
r Donot forcethesaw;
letthebladecutat highest
RPM
possible.
r The sawstops
automatically
whenthe
switchisreleased.
INSIDE
CORNER
CUTTING:
r Cuttowards
cornerat 45"
angleuntilthedepth
gauge
meetstheright
wall
(see
figure
9).
r Stopandunplug saw. Remove
depth
gauge
and
con-
tinue
the
cut
(see
figure
10).
I When
the
sawhousingmeets
both
walls,
push
sawinto
the
corneras
shown
(see
figure
11).
WARNING:
Depth
gauge
coversthe
bladeandmakes
the
saw
safer
to use.Always
unplugsawandre-install
depth
gauge
when
youaredonewithinside
corner
cutting.
DOOR
CUTTING:see Fisure
12
r Openthe doorto the maximum,
awayfrom
thecase-
ments.
Workfromtheinside
of
the
door
outward,
away
fromthe hinges.Toavoidsplintering
veneer
doors,it
may be advisableto scorethe veneer
surface
at the
desiredheight
of the cut, prior
to usingthe saw. An
application
of wide maskingtape in the cuttingzone
alsohelpsreduce
splintering,
andwillprotect
thesaw
housing
from
scratchingthe
veneer.
r NOTE:The
maximum
thickness
of cut is 15/8",
which
is
adequateformost
doors.Check for
adequate
depth
of cut before
starting.Thicker
doorsmayrequire
cuts
from both sidesof the door. Take
carenotto leave
a
thinremnant
of dooron the opposite
side,whichcan
easily
breakoff
andcrackthe
veneer.
Also,
checkthat
the
floor
is
at
the
same
elevation
onboth
sidesofthe
door,or
add
itional.
height
adjustment
may
berequired.
r The maxiumum
height
of
cut is one inch. Tocut off
higher
than
oneinch,
place
a flat sheetof plywood un-
derneath
thesaw.
Figure
9Figure
10 Figure
11
Figure
12

POCKET
DObR
CUTTING:
r Take
precautions
necessary
forveneer
doors
andcheck
doorthickness
asdescribedabove
(under
"Door
Cut-
ting").Pocket
doorcuttingrequirestwo people. One
must
holdthe
sawdownandin
a fixed
postition,
while
theother
person
slowly
pulls
thedoorintotheblade.
r Remove
anyunfinished
areaatthebottom
ofthepocket
doorwithahand
saw,following
along
in
the
pre-estab-
lished
cut.
Figure13
MASONRY
STONE,ORT|LE
UNDERCUTTTNG:
r The
No.805MasonryBladeis
primarily
usedfor
cutting
brick.ltisnotfor
usbontileoistone.'Usethe
No.822
DiamondBlade
forcuttingbrick,tileorstone.
r Masonrystone,
and
tile
undercuttingcreates
alot ofdust.
We
strongly
recommend
theoperator wear
adustmask
andplace a light clothover theairintake
onthemotor.
Thiswill
prolong
thelife
ofthe saw
r DONOT
usethissawforcuttingsteeloraluminum.
Sparks
cancause
fire
inthewallbehindthedoor
casing.
Figure14
MAINTENANGE:
r lfsaw
is
dropped,theblade
guard
maybebent,restrict-
ingitsfullreturn.
Sawdustthataccumulates
behind
the
blade
guard
will
cause
ittobecomeclogged.
Checkop-
erationoftheblade
quard
beforeeachuse. Donotuse
sawiftheblade
guart.does
notoperate
properly.
When
notinuse,store
sawinthecustom
carrying
case.

REPLACEMENTPARTS
AND
ORDERING
INFORMATION
+YS.
,il"l
sr.n*%r
@4 Itl q]Jb
%y1810-i
\_ *€ \o f,
@#**@
lsss-r-R
Order No. Description
1820-4 PowerUnit,
120volts
1820-AV PowerUnit,220volts
1820-8 Plastic
Handle
1820-C HandleFastenerSet(4)
1820-D Height
Adjuster
1820-E Housing
1820-F DepthGauge
1820-G Guide
Washer
& FastenerSet(10)
1820-H HousingFastenerSet
(4)
1820-l BladeGuard
1820-J BladeGuardSnap
Ring
1820-K BladeDriver
1820-L Spanner
Wrench
1820-M CarryingCase
(not
shown)
1820-0 PowerCord(not shown)
1820-R Switch
TypeA (not shown)
1820-R1 Switch
TypeB (not
shown)
1820-5 BrushSetONLY
(not
shown)
1820-T CarryingCase
Latch
Set(2)
(not
shown)
1820-U CarryingCaseHandle
(not
shown)
1820-V BrushHolderAssembly
w/Brushes
(not
shown)
1820-W SwitchConversion
Kit(not shown)
1555-G ThreeArmKnob
1555-l Clamp Nut
1555-0 SetScrew
1810-J BladeGuardSpring

SPECIFICATIONS:
POWER
UNIT ModelNo,820
Voltage: 120VAC,60HZ,
Construction: Doublelnsulated
PlugType: 3-ProngPlug
Amperes: 8.15Amps
Wattage: 930Watts
NoLoad
Speed: 8,000RMP
MaxDepth
ofCut: 1%'
Max.Height
ofCut: 1u
Toe
SpaceCuttingSpecifications:
Minimum
Height: 31lzu
MuimumDepth: 31lzu
Gross
Weight 14LBS.
ReplacementBlades: #821Carbid+TippdBhde
#805MasonryBlade
#822DiamondBlade
CRAIN CUTTER
Milpitas,
CA95035 TEL:
ModelNo.820V
22OVAC,sOHZ
Double
lnsulate
UKPlug
4,1Amps
930Watts
8,000RMP
1%'
1u
31lzu
31lzu
14LBS.
(same
for820V)
$ame
for820V)
(same
for
820$
WARNING:
Somedustcreatedby power sanding,sawing,
grinding,
drilling,
andothercon'siructionactiviii6scontiihl chemi-
calsknown to the State of Californinato causecancer,
birthdefects
orother
reproductiveharm.Someexamples
ofthesechemicals
are:
o leadfromlead-based
paints,
o crystalline
silica
frombrick,
cementandother
masonry
product,
?nd .
o arsenicandchromium from
chemically-treated
lumber.
Yourriskfromtheseexoosuresvaries.dependino
on how
often
youdo thistypeofwork. Toreduce yourex-posureto
these
chemicals:
workin
awell-ventilated area,andworkwith
approvedsafetyequipment,suchasthosedustmasksthat
arespeciallydesigned
tofilter
outmicroscopic
particles.
GO.,
rNC.
(408)
e46-6100
GUARANTEE
ThisCrainNo.820/820VHeavyDutyUndercut
Saw
isguaranteed to befree ofdefectsinworkmanship
and
quality
of materialsfora period ofone
year.
Anyparts
ofthissawfounddefectivesubjecttothe
guarantee
willbe replacedat nocharge.
Credit
in
full
or part cannotbe extendedbythedistributor,
norwilla newsaw be given
as a replacement or
loaner.
Sawssubjecttothiswarrantymustbeaccompanied
bysame,returnedfreightPREPAIDto Milpitas,
CA,
andmustbeinassembledcondition.
DATE
OFMFG.
www crarntools com
Printed
by: HW FORM F1820-Rev.04/04