Master Grade Electric Knife Sharpener User manual

ElectricKnifeSharpener
Commercial and OutdoorModel
PatentedWorldwide
USERMANUAL
(SAVE THISMANUAL FORFUTUREUSE)
Ê[e-mail]
www.mastergradeknifesharpener.com
Copyright ©2004~8 byJackChen

TABLE OF CONTENTS
A.Important safeguards………………………………….…..…1
B.WhyisMASTERGRADE differentfrom
otherknifesharpeners?……………………………………… 2
C.MASTERGRADE vs. aProfessionalsharpeningservice... 2
D.Howtoget the bestresultsfromyourmachine…………...2
E.MASTERGRADE vs. the otherknifesharpeners……......3
F.Cautions………..……………………………………………… 4
G. Whatcomeswiththismachine?…………………..………..4
H.Whattypesof knivescan besharpened?………………….5
I. Warning……………………………………………………….. 5
J.HowdoesMASTERGRADE work?……………………….. 5
K.Howtore-profileaknife’sbevel………………...…..………6
L.Howtosharpenacleaverorknifeblades
that isthickerthan³/16”or4mm…………………..……….8
M.Howtosharpencleaver& knife
bladesthinnerthan³/16”or4mm……………….…..……..10
N.Howtosharpenserrated knives…….……………….…….12
O. Howtoremovechipsfromdamaged knives………..…… 12
P.Specialinstructionsforextremelytemperedknives….….14
Q. Maintenance
1)Dailymaintenance……………………………………...14
2)Cleaningsharpeningwheel……..…………………….14
R.Questions& Answers…………..…………….…………..…16
S.Technicaldata
1)CommercialKnifeSharpener…………………….…… 19
2)OutdoorKnifeSharpener………..……………….…… 20
3)SoftTouchFlexibleSharpeningWheels..…………… 20
T.Warranty……………………………….…………………...…21
U.Partslist ………………………………………………….…… 22
V.Recipe (Yan CanCook)…………..…………………………23

A)IMPORTANTSAFEGUARDS
Whenusingelectricalappliances,basicsafetyprecautions should
alwaysbe observed includingthe following:
a)Read all instructions.
b)Toprotectagainstrisk ofelectricalshockdonotimmerse
cord, plugs,orportableappliancesinwaterorotherliquids.
c)Closesupervision isnecessarywhen anyapplianceisused
nearchildren.Even withadultsupervision,children should
neversharpenorhandleknives.
d)Unplugfrompoweroutletwhen notinuse,beforeputting
on ortakingoff parts, and beforecleaning.
e)Alwaysswitchthe appliancetothe “off”position before
pluggingintothe poweroutlet. Todisconnect,setthe
switchtothe “off”position beforeremovingthe plugfrom
the poweroutlet.
f)Avoidcontactingmovingparts.
g)Donotoperateanyappliancewithadamagedcordorplug
oraftertheappliancemalfunctions,orisdroppedor
damaged inanymanner.Returnappliancetothe nearest
authorized servicefacilityforexamination,repair or
electricalormechanicaladjustment.
h)Theuseofattachmentsnotrecommendedorsoldbythe
manufacturermaycausefire, electricshock, orinjury.
i)Donotuseoutdoors.
j)Donotlet cordhangoveredgeoftableorcounter.
k)Donotletcordcontacthotsurfacesanddonotplacethe
applianceon ornearahotstoveburnerorinaheatedoven.
l)Donotusethisapplianceforotherthanitsintended use.
m)Thisappliancehasapolarized plug(one proneiswider
thanthe other).Toreducetherisk ofelectricshock,this
plugwill fitinapolarized outletinonlyone way.Ifthe plug
doesnotfitfullyinthe outlet, reversethe plug.Ifitstill
doesnotfit, contactaqualifiedelectrician.Donotmodify
the pluginanyway.
n)SAVE THESE INSTRUCTIONS

B)Why MasterGrade is differentfrom
otherknifesharpeners?
“REVOLUTIONIZINGthewaytosharpenyour knives.”
Applyingthe latesttechnology,wehavedevelopedasoft
sharpeningwheelthatisunlikeconventionalstonewheeled
unitsthat overheat andgrind awaythe blade. Thisinnovative
sharpenerwill enableyou toproducea RAZORSHARP
EDGE INJUSTAFEWPASSES.
Oursisunique inthatitmakespossiblere-profilingthe knife
bevelupto 3/5"highand a1/2"thick blade.Inadditionitstill
maintainsthe desired15°angle without leavingaburred.
Professionalchefsandmeatcuttersunanimouslyagree that
the MasterGradeCommercialElectricKnifeSharpeneris
bothtechnologicallyandeconomicallysuperiortoothers.
C) MasterGradevs. asharpening service:
Cost /mocost / yr cost / 5 yr
Master Grade$3 ~ 5 $37 ~ 60 $434 ~ 549
Pro Service $39 ~ 69 $468 ~ 828
$2,340 ~ 4,140
Theabovecalculationsarebased on 6chefs' knives,3
boningknivesand 4knivesslicersharpenedonceaweek.
Professionalsharpeningservicechargeisbased onyear
2003survey.
Thisone timeinvestmentcansaveyou atleast $431~$768
withinthe firstyearand $1,906~$3,591 withinthe first5
years.Thispatentedknifesharpeneristhe#1 sellerin
England, Germany, China, Taiwanand Japan.
D) Howtoget thebest resultsfromyour machine
CONGRATULATIONSonyourpurchaseoftheaward
winning MasterGradeknifesharpener. PleaseTakeA
FewMomentsto Read TheInstructions And ViewThe
Included VideoCD toGainThe MaximumBenefitFromYour
Investment.

E
)MasterGrade
vs.
o
ther
k
nife
s
harpeners
Master Master Chef Edlund F. Dick Tru
Grade Grade Choice RS-150 Hone
Commercial
Premium
2000 401 Duo HCF
Safetouse YES YES YES YES NO•NO•
Presharpening
YES
YES
NO
YES
NO
YES
Overheating
NO
NO
YES
YES
YES
YES
Scratchingknifeblade
No Slight Excessive
Excessive
Excessive Excessive
Burr No Slight Excessive
Excessive
Excessive Excessive
15°everypass YES YES
NO
YES
NO
NO
Trueangle(Blade)YES YES YES YES NO NO
hollow-ground (Blade) NO NO NO NO YES YES
Presharpeningheight 15 mm 2mm 1mm 2mm 1mm 1mm
Debrisstorage YES YES
NO
YES
NO
NO
MotorefficiencyŒTop Top VeryLowVeryLow Medium Medium
Torque High Medium Low Low High High
Wheeltype Soft StoneŽStone•Stone Steel•Stone
NSFCertified
Yes
No
No
Yes
No
No
Retail price•
$299.95
$99.95
$499.00
$399.00
$968.00
$950.00
ŒOur Efficientmotors use the sameelectricity and output maximumpower-- thebestintheworld.
•F.Dick and TruHone bothhaveasharpening wheelwithoutcover,whichmaycause seriousinjuries.
ŽOurstones areovenbakedover45 days, forsuperbalance, comparedtomost factories onlybake1~ 3days.
•Usingdiamond honestoneorsteelw/diamond wheel alwaysscratches theknife’sbladebecause uneven
hardness ofthesharpening surface.
•Theretailprices basedon theyearof 2003survey.

F)CAUTION:
ØALWAYSWEARSAFETYGOGGLESAND CUT
RESISTANTGLOVESWHENYOU OPERATETHIS
MACHINE.
ØWHENOPERATINGTHEMACHINE,HOLDITWITH
YOUR LEFT HAND ANDHOLDTHEKNIFEWITH
YOUR RIGHTHAND
G)Whatcomeswiththismachine?
For Outdoor Model
For Commercial Model

H)Whattypes ofknivescanbesharpened?
Mostchef’sknives,carvingknives,filletingknives,Japanese
knives(exceptsashimiknives),serrated knivesand even
Chinesecleaverscan be given razorsharpedgeswiththe
MASTERGRADE knifesharpener.
I)WARNING:
NeverExposeMachineToWaterOrMoistureAt AnyTime.
NeverLeaveYourRazorSharpKnivesInAWashingBowl.
WipeThe KnifeClean AfterSharpeningAndBeforeUse.
vTo extend thelifeofthemotor,do notpress aknifeon
thewheelsohard thatthemotorisnotabletorunor
runsataveryslowspeed.Slowing orstopping the
motor will overloaditand shortenthelifeofthemachine.
vIf yourknifeisbent,straighten itbeforesharpening.Haveto
cleanall knives,includingthehandle,beforesharpening;
makesurethe blade isverydryand free ofoil,grease,and
foodparticles.Otherwise,damagemayoccurtothe
sharpeningwheelsreducingperformanceand the lifeofthe
sharpener.
J)HowdoestheMasterGradework?
Themachinehastwosharpeningopenings.Theleft opening
isfortheleftside ofthe blade,andthe rightopeningisfor
rightside oftheblade.Pull the knifebladethroughthe left
opening,and thenrepeatintherightopening.Continue this
alternatingprocess,decreasingpressurewitheachpass, until
the bladeissharp.
Thefirsttimeyousharpenyour knifeon theKnife
Sharpener,you willneedtospend moretimetoestablish
thedesired15 angle.Thisisaccomplishedwiththe
coarsewheels.Subsequentsharpeningshouldbedone
withthefinewheelsand will requireonlyafewpasses.

K)Howtore-profileaknife’sbevel
(Use CW-280 wide opening cover)
1) Removethetop coverbyunscrewingthe inset hand screw.
2) Removethefinewheels(FS-304F)byunscrewingcaps.
3) Insert the coarsesharpening wheels (FS-300C).
4) Afterscrewingthe wheelcapsback on snugly,re-install
the top.(The wide openingtop CW-280.)
5) Makesurethewholeknifeisdryandclean.Ifknifetipis
bent, straightenit beforesharpening.
6) Holdyourknifefirmandinsertthebladeintotheleft
openingleaningyourknifetothe left. Tilttheknife against
sharpeningwheeland drawthe knifesmoothlyback
towardsyou withmoderatedownpressure, ifyou hearthe
motor isslowing down,you areusing toomuchdown
pressure. (Fig3)

7) Inserttheknifeintotherightopening,leaning yourknifeto
theright. Tilttheknife againstthesharpeningwheeland
drawthe knifesmoothlyback towardsyou withequaland
constantdownpressureasinstep6.(fig4)
8)Continuealternatingprocess until you seethe slicerknife
bevel5 ~15 ,cleaverbevel15 ~25 .Theprocessofre-
profiling thebevelmaytake 10 or morepasses
depending on thebladecondition and bladetemper. The
nextstage usestheFS-302Mmediumsharpeningwheelsto
smooththeedge.Finally,tomakearazorsharpedge–
followinstructionsonpages8and page10.

L) Howtosharpenacleaverorknifeblade
thatis thicker than³/16”or4mm
(If attemptingtosharpenabladethat is
thinnerthan
³/16” or 4 mm please see page 11)
1)Removethetop coverbyunscrewingthe inset hand screw.
(See fig1on page6)
2)Insertthepropersharpeningwheels(for regularknivesuse
FS-304Ffinesharpeningwheels,forcleaversuseFS-302
mediumwheels, seefig2on page6)
3)Afterscrewingthe wheelcapsback on snugly,re-install the
wide openingcover(theCW-280cover).
4)Makesurethewholeknifeiscleananddry.Iftheknifetipis
bent, straightenit beforesharpening.
5)Holdtheknifefirmlyand startwiththe knifeintheforward
positionwiththeblade intheleft openingandparalleltothe
flatsurface(seefig5).Drawthe knifesmoothlyback
towardsyou withmoderatedownpressure (ifyou hearthe
motor isslowingdown,you areusing too muchdown
pressure). Somekniveshaveacurved end,soastheknife
curves,rotateyourarmupwardssothatthecontactsurface
isalwaysparalleltotheflat surface.
6) Repeatthe process inthe rightopeningtosharpen the other
side ofthe knife,seefig6(ifthe knifehasonlyone
sharpenededge,
useonlythe onerelevantopening).
Continuealternatingthe processdecreasing pressurewith
eachpassuntil theknifefeelssharptothetouchorslicing
paperfeelssmooth. (USE CAUTION-AVOIDCUTTING
YOURSELF).When re-profiling theedgeofadull knife
theprocess maytake 10 or morepasses depending on
thecondition and thebladetemper.
7)Makesurebladehasno burrs(seefig7a&bonpage9&
11),otherwiserepeatstep 5&6withminimumpressure
(FEATHERTOUCH)until theburrsdisappear.

M) Howtosharpencleaver& knifeblades
thinner than³/16”or4mm.
Note: Theoutdoormodel doesn’t haveanarrowopening cover,
therefore,use thesameproceduresinLonpage8
1)Removethetopcoverbyunscrewingtheinsethandscrew.
(see fig1onpage6)
2)Install thesharpeningwheels(regularknivesuseFS-304F
finesharpeningwheels,forcleaversuseFS-302medium
wheels). see fig2onpage6).
3)Afterscrewingthe wheelcapsbackonsnugly,re-install the
top (thenarrowopening top CN-280).
4)Makesurethewholeknifeiscleananddry.If theknifetip
isbent, straightenit beforesharpening.
5)Holdthe knifefirmlywiththe blade inthe forwardposition,
asshowninfig8.Startwiththe knifeintheforward
positionwiththebladeintheleftopeningtoline 1on cover
and paralleltothe flatsurface.Drawthe knifesmoothly
back towardsyou withmoderatedownpressure(ifyou
hearthemotorisslowingdown,you areusingtoo much
pressure). Someknives haveacurvedend,soas the
knifecurves,rotateyour arm upwardssothatthe
contactsurfaceisalwaysparalleltotheflatsurface.
6)Repeattheprocessinrightopening(see fig9toline1).(If
theknifehas onlyonebeveledge,thenuse onlythe
relevantopening).Continuealternatingthe process,
decreasingpressureand positionbladetoline 2(fig10&
11).Repeatprocess and positionbladetoline 3(fig12&
13)until theknifefeelssharptothetouchorslicingpaper
feelssmooth (USECAUTION-AVOIDCUTTING
YOURSELF).
7)Makesurethe bladehasno burrs(see fig7a&b),
otherwiserepeatstep5&6withminimumpressure

(FEATHERTOUCH)until the burrsdisappear.The
process ofre-profilingthe edgemaytake10 ormore
passesdependingontheconditionandhardness ofthe
knifeblade.

N)Howtosharpenserratedknives
1)Usewide openingcover(CW-280)
2)Makesurethewholeknifeisclean and dry. Iftheknifetipis
bent, straightenit beforesharpening.
3)Startwiththeknifeinthe forwardpositioninthe leftopening
.
Ratherthan droppingthe bladedeep intothe slotofthe
coverasinstep5above, keep the bladeelevated sothatit
makescontactwith only the upperpartofthewheel;
simultaneouslytilttheblade tothe left applying minimal
pressure(feathertouch),excessivepressuremayripthe
wheeland damagetheblade. (fig14)
4)Repeatinrightopeninguntil bothsidesoftheblade are
smooth. Donotattempttosharpenthebottompartofthe
serrated teeth.
O)Howtoremovechipsfromdamaged
knives (useFS-300Ccoarsewheel)
1)Ifyourknivesare³/16”or4mm thick ormore usethewide
openingcover(CW-280)otherwiseusethe narrowopening
cover(CN-280).
2)TheMASTERGRADEcanrepair chipsup to ⅛”.Ifchips
arebiggerthan ⅛”do notattempttorepair.It maycause
damagetothesharpening wheel and machine.
3)Useonlythe FS-300Ccoarsewheel.
4)Makesurethewholeknifeisclean and dry. Ifknifetipis
bent, straightenit beforesharpening.
5) Inserttheknifefirstthan turnonthemachine. Startwiththe
knifeinthe forwardposition withtheblade intheleftside
openinginfrontofchip. Slowlypull the knifethroughtheslot
paralleltotheflatsurfacepastthechip.Next,drawthe knife
smoothlybackwardandforward.Continuetheprocess inthe
rightopeningalternatingthe process until chipsdisappear.
(see fig15)
6)Ifchipsaredeeperthan '/16”.Afterall chipsareremoved,
drawthe knifesmoothlyback towardsyou withmaximum
downwardpressure(ifyou hearthe motorisslowingdown,
you areusingtoo muchdownpressure).Continue

alternatingthe processineachopeninguntil the edgeis
straight. (See fig16).

P)Special instructionsforextreme
temperedknives
Mostextremetempered knivesusespecialmaterialslike
440 steels,highspeed steels…etc.You mayfind those
materialsuseinGerman knives,MasterGrade knivesand
JapaneseGlobalKnives.Thoseknivesthesharpened
edges arenotaseasytosharpenevenly asmostother
knives.So,specialcareand proceduresarenecessary
when sharpeningtheseexpensiveknives.
Werecommendthatbeforeyou sharpen aboveknives,
you “breakin”the NEWFS-300Ccoarsesharpening
wheel bysharpeningconventionalknivesafewtimesto
re-profilethecorrectbevel.Afteryou getthe correctbevel
forthe blade,usethe FS-302Mmediumsharpeningwheel
tosmooththe edge.
FinallyuseFS-304Ffine sharpeningwheeltore-movethe
burrsandrestorearazorsharpedgetotheseknives.In
ourexperience,the mosteffectivewaytosharpensucha
knifeistousethe leftopeningmorethanthe right. Using
verylightpressure,trythe followingsequence: LEFT,
LEFT, RIGHT,LEFT
Q)MAINTENANCE
1) DAILYMAINTENANCE: Toclean debrisloosen hand
screwon bottomofunit, removecoverandremovethe
sharpeningwheel.Shakeunitupside downand brushto
clean.Repeatcleaning atleast onceadayorafterevery
fiveuses. (Seefig17)
2) CLEANINGSHARPENINGWHEEL: Tocleardebrisfrom
sharpeningwheel,useabrush(hardbristles)with
detergentscruboff debrisandrinsewithcleanwater.
Allowatleast24 hourstocompletelydrybeforeusingit
again(see fig18).

R)Questions& Answers
1)Q:CanMasterGradeknifesharpenersharpenanyknife?
A: Yes,itcansharpenmostknives.Forserratedknives,see
fig14onpage13.
2)Q:CanKE-280sharpenscissors?
A: Yes, but wedo notrecommend it forsafetyreasons.
3)Q:CanKE-280sharpenthelawnmowerblade?
A: Yes,justuseanewsetofcoarsesharpeningwheelsand
wide openingcover.
4)Q:Whereisthismachinemanufactures?
A: FinalassemblingisinTaiwan,However,partscomefrom
USA, Holland, Sweden, Japan andTaiwan.
5) Q:Iamalreadyusing aProfessionalSharpening Service
.
Whydo I needanelectricknifesharpener?
A: Pleasesee detail inpage2paragraphC.
6)Q:HowcanIgetthebestresultsfrom thesharpener?
A: Pleasesee detail inpage2paragraphD.
7)Q:Howlongdoesittaketoreplace thesharpening
wheels?
A: It onlytakesabout10 ~15seconds.
8) Q:WhyisMasterGradebetterthanothercommercial
knifesharpenerson themarket?
A: Pleasesee detail inpage3.
9)Q:How long will thesharpening wheelslastand whendo
I havetochangethemtodifferentgradesofwheels?
A: Pleasesee page20 section3fordetail.
10) Q:Ifawheelripsand isreplacedandthewheelrips
againwhatshouldI do?
A: Inserttheknifeinsharpeningslotbeforeturning
iton.
Repeat it intheoppositeslot.

11)Q:Doesitgettheknifesharp enough toremovehair
from your arm, likearazor?
A: Ifyou useasharpeningstone,you havetohaveavery
good sharpeningskill.Fromourexperienceaboutonly1
outoften thousandpeoplecandoit. Ifyou useour
commercialmodeloroutdoormodel95%peoplecandoit.
Wewouldliketorecommendyou touseoldknivesorthe
knivesyou wanttothrowthemawaytopracticeuntil you
becomefamiliarand adeptattheproperpressureand
achievingdesired bevels. Thenpracticingwithdifferent
type of knives,onceyou’velearned the skill,yourknifewill
definitelyremovehair fromyourarm.
12)Q:Whyaretheretwodifferentcoversfor commercial
model knifesharpener?
A: Toprovide moreversatilityinsharpening differentsizes
and typesofknives.
1.CW-280isforwide knives&cleaverswiderthan³/16”or4
mmandtocreatebevelsbetween 6 ~30 .
2. CN-280 narrowcoverisdesignedtofitknives less
than4mm or ³/16”thick.Thiscovermakes iteasyto
guideyour knifestraightthrough theslotsatthe
properangleand reduces vibration,especiallywith
smallerknives. Werecommenduseofthiscoverinitially
until you becomefamiliarandadeptatusing the proper
pressureand achieving desired bevels.
13)Q:WhenIturn on themachine, itdoesnotrun.
A: 1.Makesureyou haveplugged inmachine topoweroutlet.
2.Machine hasbeenimmersedinthe liquid& hasshort
circuited themotorwire.
14) Q:Whatisthebestwaytomaintainand prolong the
sharpenededge? (Whydoes theknifegetdull so
quickly?)
A: Thisisbecauseyourknifebladestill hasburrs.Whenyou
sharpenyourknife,especiallythe lastfewpasses,doit
lightly-minimumpressure(FEATHERTOUCH)until all burrs
havedisappeared (seepage8Step7and fig7A &B)or
you can useasharpeningstick toremovetheburrs.

15)Q:WhenIturn on themachinethemotor isrunning but
bothsidewheelsarenotturning atthesamespeed.
A: Inourexperience,therearetwopossiblecauses:
1. Aknifeblade wasinsertedforcefully(sudden entry)into
the slotandpusheddowntoo hardandcausethewheel
tostop rotatingwhilethe motorcontinuestoturn.This
will dislocatedanddestroythe gears,andthewheelswill
appeartorotateatdifferentspeeds.Afterashorttime,
the wheelswillstop rotatingall together.Theunitwill
needtobeserviced.
2. Themachinewasdroppedfromover5feethigh,which
couldhavedislocatedthe gear.Thenexttimethatyou
turnon the machine and the gearisnotinthe proper
position,itwill destroythe wholegearandcauseitto
malfunction. The unitwill need tobeserviced.
16)Q: Whythesharpening wheelsDONOTlastasspecifiedin
question #5?
A:1.Iffinesharpeningwheelsareused forre-profiling,itwill
causeexcess wear. Useonlycoarsewheelsforprofiling.
2.Ifyourkniveshavechip(s),the sharpeningwheelswill
wearout quicklyortheymayripthe sharpeningwheel.
3.Useofexcessivepressurewhen sharpeningyourknife
will shorten the lifeofthe wheels.
4.Dirtyknivesthathavefoodparticlesorliquidonthemwill
damagethewheelsurface.
5.Afterapproximatelyhalfofsharpeningwheellife,you will
noticethatonlyhalfofyoursharpeningwheel hasbeen
used.Removethewheelfromtheunitandturnitover.
Thiswill exposethe unusedportionofthewheeltothe
bladetobe sharpened.