Master Grade Pro User manual

Multi-Stage
Electric Knife Sharpener
Pro and Premium Model
Patented Worldwide
USER MANUAL
(SAVE THIS MANUAL FOR FUTURE USE)
¬[email protected]
www.mastergradeknifesharpener.com
Copyright © 2008 by Jack Chen

IMPORTANT SAFEGUARDS
When using electrical appliances, basic safety precautions should
always be observed including the following:
a) Read all instructions.
b) To protect against risk of electrical shock do not immerse
cord, plugs or portable appliances in any liquids.
c) Close supervision is necessary when any appliance is used
near children. Even with adult supervision, children should
never sharpen or handle knives.
d) Unplug from power outlet when not in use, before putting
on or taking off parts, and before cleaning.
e) Always switch the appliance to the “off” position before
plugging into the power outlet. To disconnect, set the
switch to the “off” position before removing the plug from
the power outlet.
f) Avoid contacting moving parts.
g) Do not operate any appliance with a damaged cord or plug
or after the appliance malfunctions, or is dropped or
damaged in any manner. Return appliance to the nearest
authorized service facility for examination, repair or
electrical or mechanical adjustment.
h) The use of attachments not recommended or sold by the
manufacturer may cause fire, electric shock or injury.
i) Do not use outdoors.
j) Do not let cord hang over edge of table or counter.
k) Do not let cord contact hot surfaces and do not place the
appliance on or near a hot stove burner or in a heated oven.
l) Do not use this appliance for other than its intended use.
m) This appliance has a polarized plug (one prong is wider
than the other). To reduce the risk of electric shock, this
plug will fit in a polarized outlet in only one way. If the plug
does not fit fully in the outlet, reverse the plug. If it still
does not fit, contact a qualified electrician. Do not modify
the plug in any way.
n) SAVE THESE INSTRUCTIONS

CAUTION:
¾ALWAYS WEAR SAFETY GOGGLES AND CUT
RESISTANT GLOVES WHEN YOU OPERATE
THIS MACHINE.
¾WHEN OPERATING THE MACHINE, HOLD IT
WITH YOUR LEFT HAND ON THE FINGER
GRIPS AND HOLD THE KNIFE FIRMLY WITH
YOUR RIGHT HAND.

WHY MASTER GRADE?
1) Our stones are oven baked at least 45 days for superior
balance. Most factories only bake 1 ~ 3 days.
2) Master Grade knife sharpeners use patented angle guides
are able to sharpen knife blade thickness up to 1/4” width.
Other knife sharpeners can only sharpen 1/64” ~ 1/16” in
width. Since most knife blade widths are more than 1/16”
other sharpeners cannot sharpen these thicker blades. If
the sharpening slots of other sharpeners are made wider to
accommodate these thicker knives, the knife will vibrate
during the sharpening. The patented angle guides used in
Master Grade knife sharpeners prevents this problem.
3) Master Grade knife sharpener patented angle guides are
able to sharpen knife blades up to ¹/8” high for a re-profiling
of the knife blade. Other branded knife sharpeners cannot
be used for this function because these machines can only
sharpen the blade up to ¹/16” high. The patented angle
guides used in Master Grade knife sharpeners solves this
limitation.
4) Since only the bevel of the blade makes contact with the
sharpening wheel, the life of your cutlery is extended up to
10 times. Master Grade sharpening stones restore the
blade edge to an optimal bevel.
Other brands knife sharpeners
are incapable of profiling knife
blades. They can only sharpen
a maximum of ¹/16” or 1.5 mm
high. Therefore it is impossible
to produce a perfect edge.
Master Grade can re-profile
the knife blade up to ⅛” or
3.2 mm high, thus making a
perfect blade angle of 12˚~
16˚.

HOW TO GET THE BEST RESULTS FROM
YOUR MASTER GRADE MACHINE
CONGRATULATIONS on your purchase of the award winning
Master Grade Electric Knife Sharpener. PLEASE READ THE
OPERATION MANUAL THOROUGHLY TO GAIN MAXIMUM
BENEFIT FROM YOUR INVESTMENT.
When you are using this knife sharpener for the first time.
PLEASE USE AN UNWANTED/OLD KNIFE TO PRACTICE.
After you have become familiar and comfortable handling the
machine you can start sharpening other, more valuable knives.
Initially, when you sharpen conventional knives or extremely
hard temper knives for the first time, you will need to spend
more time matching the angle of the knife blade edge to the
desired pre-set 15˚angle of the knife sharpener. Subsequent
sharpening will be much quicker and require fewer passes. A
few more passes through each section is normal.
What are the differences between Premium
and Pro?
Pro Model: Uses regular sharpening stones and angle guides.
This machine can produce near razor sharp blade. The
professional model machine requires the user to have better
sharpening skills than users of the premium model.
Premium Model: Uses better gear, bearing, sharpening stones
and premium angle guides. This machine can produce a razor
sharp edge. When sharpening knives, the knife has to be
tilted to sharpen the bevel.
When you un-pack the machine for the first
time. You will find some dusts in the debris tray.
Those are coming from manufacturing QC
testing before packaging. The test usually takes
around 15 ~ 30 minutes for each machine.

WARNING:
Never expose the machine to water or moisture at any time.
Never leave your razor sharp knives in a washing bowl.
Wipe the knife clean after sharpening and before use.
To extend the life of the motor, do not press a knife on
the wheel so hard that the motor is not able to run or
runs at a very slow speed. Slowing or stopping the
motor will overload it and shorten the life of the machine.
Clean the knife including the handle before sharpening; make
sure the blade is very dry and free of oil, grease, and food
particles. Sharpening a dirty knife will damage the wheel and
reduce the machine’s performance and life.
HOW DOES THE MASTER GRADE WORK?
There are two sharpening sections, each with two grooves.
The A & B grooves on the left (section 1) are the coarse
sections (for re-profiling of the blade) and the C & D grooves
on the right (section 2) are the fine sections for honing a
perfect edge. (Most other sharpeners are designed to sharpen
both edges simultaneously, which almost always overheats the
blade, resulting in loss of temper in the metal.
As a rule, both sides of the blade are sharpened. Exception:
Some Japanese style knives have only one edge that can be
sharpened. The left groove in each section sharpens the right
edge of the knife and the right groove sharpens the left edge.
Be mindful of the type of knife you are attempting to sharpen.
WHAT KNIVES CAN BE SHARPENED?
Most chef’s knives, carving knives, filleting knives, Japanese
knives, Chinese cleavers and chopping knives (it is not
recommended for sashimi, serrated or single edge knives)

SHARPENING INSTRUCTIONS
STEP 1
(This procedure is only for conventional knives or
if the knife has a thick blade that needs to be
reprofiled. If not, begin with STEP 2.)
Switch on the machine. Using only the coarse section (sec 1).
For pro model: begin by holding the knife straight in the
forward position with the blade in groove A and parallel to the
flat surface (see fig 1).
For the premium model: start with the knife in the forward
position and tilt the knife in groove A and parallel to the flat
surface (see fig 3). (when you insert the knife in groove A,
tilt your knife to the left, in groove B, tilt your knife to the
right). Note: Tilt less angle of the knife’s blade will re-
profile more blade out and make thinner edge of your knife.
Draw the knife smoothly back towards you with moderate down
pressure (if you hear the motor slowing down, you are applying
too much down pressure). When you push down on the knife,
the sharpening stone should move less than 1/32" to the side.
If while sharpening the knife you apply excess pressure to the
knife and move sharpening stone more than 1/16" to the side, it
may create a jagged knife blade. Premium Model is prevents
this problem.
Some knives have a curved end, so as the knife curves, rotate
your arm upwards so that the contact surface is always parallel
to the flat surface. Now repeat the process in groove B in the
coarse section (see fig 2 for pro model and fig 4 for premium
model) to sharpen the other side of the knife (if the knife has
only one sharpened edge then use only the one relevant
groove). Continue alternating the process through the coarse
section until the knife feels sharp to the touch (USE CAUTION -
AVOID CUTTING YOURSELF) then finish with step 2 in
page 11. The process of re-profiling the edge may take 10 or

more passes depending on the condition and hardness of the
knife. Be patient. Super tempered knives or conventional
knives may take longer to re-profile the bevel.
For Pro model only Step #1
For Premium model only Step #1
For Pro and Premium model
For Pro and Premium model

STEP 2
Weekly maintenance, start from this step.
When the knife feels exceptionally dull, begin from STEP 1. If
not, when you feel the blade is only slightly dull, begin from
groove C in the fine section (section 2). Some knives have a
curved end, so as the knife curves, rotate your arm upwards so
that the contact surface is always parallel to the flat surface and
finishes the process (see fig 9 & 10).
For the premium model: when you insert the knife in
groove C, tilt your knife to the left, in groove D, tilt your
knife to the right (see fig 11 & 12).
5 ~ 10 passes in each groove C & D continue alternating the
process through the fine section and decrease pressure with
each pass. The last stage will require only minimal down
pressure. Using a FEATHER TOUCH on the knife will produce
a NEAR RAZOR SHARP edge (see fig 7 & 8). On the last few
passes, using very light (feather) pressure, try the following
sequence: right, right, left and right (groove D, groove D, groove
C, and groove D) to smooth the edges. If the blade looks like
fig. 5 or 6 repeat STEP 2 until the blade edge looks like fig 8
and slicing paper feels smooth (USE CAUTION - AVOID
CUTTING YOURSELF). A knife edge similar to figure 8 is ideal
for use in food carving and preparation.
Step #2 for Pro model only
Step #2 for Premium model only

SPECIAL INSTRUCTIONS FOR EXTREMELY HARD KNIVES
Most German knives and Japanese Global Knives are produced
from extremely hard and brittle steel. The sharpened edges are
not easy to sharpen evenly. Therefore, special care and
procedures are necessary when sharpening these expensive
knives.
The Master Grade has two sharpening sections – coarse
(section 1) and fine (section 2)
We recommend that before you sharpen these knives, you follow
a “break in procedure” for step one. Perform the “break in
procedure” of section 1 (COARSE section) by sharpening
extremely hard temper knives a few times to establish an
accurate bevel.
Maintenance Only: Use the Fine Section (SECTION 2)
After you get the correct bevel, go to step two on page 8. To
complete the sharpening of a super tempered knife please use
groove D (right hand groove) more than groove c (left hand
groove). This will sharpen the left edge of the knife more
than the right.
Using very light pressure, try the following sequence: right,
right, left, right. (groove D, groove D, groove C, groove D)
Although the cutting edge will show grinding marks from the fine
sharpening wheels, the sharpening process should restore a
sharp edge to the knife.
WARNING:
For the pro model, when you sharpening knives (especially super
tempered knife) always use moderate down pressure and speed
while moving the knife towards you. If you move your knife too
slowly or do not move it at all, it might create a jagged blade edge.

MAINTENANCE
Remove and clean the slide out dust collector tray beneath the
machine and wipe the top surface with a dry cloth.
WARRANTY
The limited warranty is valid only in USA and Canada for
HOUSEHOLD USE ONLY, against manufacturer’s defects.
Usual wear and tear or damage due to abuse, misuse, or
neglect is not covered. The customer is responsible for all
freight charges.
Five year limited warranty for Premium model.
Two year limited warranty for Pro model.
To activate this warranty, you must complete and return
registration form within one month of purchase. Included
with the registration form, you must also include a copy of
the receipt showing your original date and place of
purchase.
TECHNICAL DATA
Premium Angle Guides Premium model
Regular Angle Guides Pro model
Premium sharpening stone Premium model
Regular sharpening stone Pro model
Wheel Speed 1,100 R.P.M.
Torque 900 G.C.M.
Maximum Blade Angle (ө) 15°
Minimum Blade Angle (ө) 11°
Blade sharpening area (high) Max 1/8” or 3.2 mm
L X H X W (inch/centimeter) 9”X3”X3.7” / 22cmX7cmX9cm
Net Weight 2.5 Lbs / 1.1 Kg per unit

Questions & Answers
Q1: Where is this machine made?
A1: Final assembling is in Taiwan. Parts come from Holland,
Sweden, Japan, USA and Taiwan.
Q2: When I first received the machine, I found some dust in the
debris holder. Is it a new machine?
A2: Yes, please see the bottom of page 4 for detail.
Q3: What kind of knives can be sharpened?
A3: Please see the bottom of page 5 for detail.
Q4: How do I get the best result from this machine?
A4: Please see the top of page 4 for detail.
Q5: What is different between the Pro and Premium Models?
A5: Please see page 4 for detail.
Q6: Do we need to replace the sharpening stone on a regular
basis?
A6: No, as we use a precision balanced stone that is baked for 45
days. For home use, normally it will last for 10 years or
longer depending on how heavily you use it. The stone,
bearing and gear are all mounted together. If you take them
apart you can't put them back together. The stones are not
serviceable and do not need to be changed.
Other brands of knife sharpeners use less expensive stones
baked 1 ~ 3 days. As a result, these other brands of
sharpener stones are not precision balanced and have un-
even surface hardness. This unevenness will unnecessarily
grind down and wear out the blade. This is why our knife
sharpener can extend your cutlery’s life up to 10 times longer
than other branded knife sharpeners.

Q7: Does the knife get sharp enough to remove hair from your
arm, like a razor?
A7: It might, if you have very good sharpening skills. In our
experience about only 1 out of 10,000 people can do it. This
machine is designed for daily use in the home kitchen. It is
better than most other sharpeners in the market. If you need
a knife sharp enough to remove hair from your arm, then we
recommend that you to buy our commercial model, it will
definitely remove hair from your arm, and will sharpen your
knife to a razor sharp edge.
Q8: I saw a similar sharpener for sale at a much lower price, why?
A8: BEWARE of Copycats. These are cheap imitations. The
more successful our products are in the market, the more
people will want to copy ours. Our products are protected by
patents worldwide, so we have, and will continue to
vigorously pursue any infringement of our patents.
Q9: The first time I tried to use this machine, it destroyed my knife
by making the edge jagged.
A9: This is most unfortunate and likely due to not following the
sharpening procedures as detailed above. We recommend
that you read the manual thoroughly. If your knife is very dull
then you should focus your attention to the sharpening
procedures on page 6. If it is not bull, then go to page 8.
The operation manual has only 14 pages and it takes less
than a half hour to read it thoroughly. Doing so will ensure
the best results possible from this machine.
Please use an unwanted/old knife to practice for the first few
times before you sharpen your other knives. This machine is
designed for the average home user. If, after reading the
manual and practicing with old knives, you still have problems
please try our Master Grade Multi-Stage Electric Knife
Sharpener PREMIUM Model. In the meantime you may send
your knives to us. We will repair them free of charge.

Q10: What is the difference between Multi-Stage Electric Knife
Sharpener and Commercial Electric Knife Sharpener?
A10: Master Grade Commercial Electric Knife Sharpener (heavy
duty): is designed for commercial use and will last for more
than 10 years. It sharpens to a, like new, razor edge in just
a few seconds without generating burrs. This is the only
Sharpener on the market that uses Patented Soft Touch
Flexible Sharpening Concept (it doesn’t use stones, rather it
uses soft touch wheels). The Commercial sharpener will re-
profile your blade up to 3/5" high. The price is slightly more
expensive and requires some practice to use.You will need
to read and understand the owner’s manual thoroughly and
get some practice sharpening knives 10 ~ 20 times per side
in order to obtain the maximum benefit from the machine.
With a little practice you will become an expert and can even
start your own sharpening knife business.
Multi-Stage Electric Knife Sharpener (light duty, for home
use): is designed for home kitchen use and lasts 3 - 5 years.
In general it depends on the condition of the knife. It takes
around 5 ~ 10 minutes to get a near razor sharp edge.It can
generate some burrs, but you can eliminate these burrs by
passing the blade through the fine section a few times with a
feather touch until it gets a clean edge. The burr, if any, is
still less than other sharpeners. Although other sharpeners
seem to produce no burr on the edge, they sharpeners
actually create a very short bevel so the burr is difficult to
see without magnification. If you put these blades under
magnification, the burr will be seen even coarser than the
Master Grade. Magnification will also show that these other
sharpeners do not create the proper angle to make the knife
sharp.
By re-profiling your blade up to 1/8" high, the Master Grade
is much better than other machines available on the market.
Although the Master Grade sharpener uses a sharpening
stone, IT IS STILL THE BEST VALUE FOR YOUR MONEY
compared to other brands. Other brands that sport fancy
names like “Diamond Hone” all use stones or disks. In fact
these stones are less precise than the Master Grade stones,
as detailed above.

This machine requires no skill to use but you must read the
user manual thoroughly. This machine can produce a near
razor sharp knife edge.
If you have any suggestions or further questions not
covered in this operation manual please contact us
via email: [email protected] or go
to website www.mastergradeknifesharpener.com and
contact us.

Recipes
by Master Chef Martin Yan
TV host on PBS “Yan Can Cook” Show

Seasonal Fruit Napoleon (Makes 4 - 6 servings)
Ingredients
16 wonton wrappers
1 cup whipping cream
1/4 cup powdered sugar
1/2 teaspoon vanilla extract
150 g canned or fresh lychee, pitted and halved
4 kiwifruit, peeled and sliced
2 plums, pitted and sliced
10 strawberries, sliced
20 pieces canned mandarin oranges, drained
Cooking oil for deep-frying
Mint sprigs for garnish
Sauce
1/2 cup water
1/4 cup lemon juice
2 tablespoon orange liqueur
1/3 cup sugar
2 tablespoon cornstarch, dissolved in 2 tablespoons water
Cooking Method
1. Heat cooking oil for deep-frying over high heat. Add wonton
wrappers in 2 batches; deep-fry 30 seconds or until golden
brown. Remove and drain on paper towels.
2. Combine sauce ingredients in a saucepan. Cook over medium
heat, stirring constantly, until sugar dissolves. Add cornstarch
solution; cook, stir until sauce thickens. Set aside.
3. Place whipping cream in a bowl; whip until frothy. Add
powdered sugar and vanilla extract; continue whipping until
soft peaks form.
4. For each serving, arrange a few slices of fruit and whipped
cream on top of each wonton skin; make 3 to 4 layers. Drizzle
sauce on top. Garnish with a sprig of mint and serve.