MK Diamond Products MK-112 System manual

02.2004
MK-112 TILE SAW
OWNERS MANUAL &
OPERATING INSTRUCTIONS
www.mkdiamond.com
Caution: Read all safety and operating instructions before
using this equipment.This parts list MUST accompany the
equipment at all times.
Revision 202

2
SAFETY INSTRUCTIONS FOR THE MK-112 TILE SAW
Congratulations on your purchase of a MK-112 Tile Saw. We are certain that you will be pleased with your
purchase. MK Diamond takes pride in producing the finest construction power tools and diamond blades in the
industry.
Operated correctly, your MK-112 should provide you with years of service. In order to help you, we have
included this manual. This owners manual contains information necessary to operate and maintain your MK-112
safely and correctly. Please take a few minutes to familiarize yourself with the MK-112 by reading and reviewing
this manual.
If you should have questions concerning your MK-112, please feel free to call our friendly customer service
department at: 800 421-5830
Regards,
MK Diamond

3
TABLE OF CONTENTS
SAFETY
DAMAGE PREVENTION AND INFORMATION MESSAGES __________ 4
SAFETY MESSAGES ________________________________________ 4
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS _______ 4
CALIFORNIA PROPOSITION 65 MESSAGE ______________________ 6
ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS __ 8
TILE SAW SPECIFIC WARNINGS _____________________________ 10
SAFETY LABEL LOCATIONS _________________________________ 10
PRODUCT SPECIFICATIONS ________________________________ 11
UNPACKING, TRANSPORT and ASSEMBLY
UNPACKING ______________________________________________ 12
CONTENTS _______________________________________________ 12
TRANSPORT______________________________________________ 12
ASSEMBLY _______________________________________________ 13
SETUP, ADJUSTMENT & OPERATION
SETUP___________________________________________________ 14
ADJUSTMENT & OPERATION ________________________________ 16
CLEANUP ________________________________________________ 18
MAINTENANCE AND TROUBLESHOOTING
MAINTENANCE____________________________________________ 19
TROUBLESHOOTING_______________________________________ 21
EXPLODED VIEW AND PARTS LIST
EXPLODED VIEW __________________________________________ 22
PARTS LIST ______________________________________________ 23
THEORY
THEORY OF DIAMOND BLADES______________________________ 26
ACCESSORIES____________________________________________ 26
ORDERING & RETURN INSTRUCTIONS
ORDERING INFORMATION __________________________________ 27
RETURN MATERIALS POLICY _______________________________ 27
PACKAGING INSTRUCTIONS ________________________________ 27
AUTHORIZED SERVICE CENTERS____________________________ 27

4
SAFETY
Read and follow all safety, operating and maintenance instructions. Failure to read and follow these instructions
could result in injury or death to you or others. Failure to read and follow these instructions could also result in
damage and/or reduced equipment life.
SAFETY MESSAGES:
A Damage Prevention Message is to inform the user of important information and/or instructions that could lead
to equipment or other property damage if not followed. Information Messages convey information that pertains
to the equipment being used. Each message will be preceded by the word NOTE, as in the example below.
DAMAGE PREVENTION AND INFORMATION MESSAGES:
NOTE: Equipment and/or property damage may result if these instructions are not followed.
In order to prevent injury, the following safety precautions and symbols should be followed at all times!
GENERAL SAFETY PRECAUTIONS AND HAZARD SYMBOLS:
Safety Precautions:
Form a habit of checking to see that keys and adjusting wrenches are removed from the power tool
before it is turned on.
Cluttered work areas and benches invite accidents.
DO NOT use power tools in damp or wet locations nor expose them to rain. Always keep the work area
well lighted.
All visitors and children should be kept a safe distance from work area.
A safety message alerts you to potential hazards that could hurt you or others. Each safety message is preceded
by a safety alert symbol ( ) and one of three words: DANGER, WARNING, or CAUTION.
DANGER
You WILL be KILLED or SERIOUSLY INJURED if you do not follow directions.
WARNING
You CAN be KILLED or SERIOUSLY INJURED if you do not follow directions.
CAUTION
You CAN be INJURED if you do not follow directions. It may also be used to alert against unsafe practices.
ALWAYS read this Owner’s Manual before operating the machine.
ALWAYS keep the Blade Guards in place.
REMOVE ADJUSTING KEYS AND WRENCHES
KEEP WORK AREA CLEAN
KEEP CHILDREN AWAY
DO NOT USE IN DANGEROUS PLACES

5
SAFETY
If using an extension cord make sure it is in good condition first. When using an extension cord, be
sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause
a drop in line voltage that will result in a loss of power and overheating. TABLE 1, Page 9 shows the
correct AWG size to use depending on cord length and nameplate ampere rating. If in doubt, use the
next heavier gage. The smaller the gage number, the heavier the cord.
DO NOT wear loose clothing, gloves, neckties, rings, bracelets, or other jewelry that may be caught in
moving parts. Non-slip footwear is recommended. Wear protective hair covering to contain long hair.
Keep proper footing and balance at all times by not overreaching.
Clamps or a vise should be used to hold work whenever practical. Keeping your hands free to operate
a power tool is safer.
Keep tools clean for the best and safest performance. Always follow maintenance instructions for
lubricating, and when changing accessories.
Power tools should always be disconnected before servicing or when changing accessories, such as
blades, bits, cutters, and the like.
Make the workshops kid proof by using padlocks, master switches or by removing starter keys.
A power tool will do a job better and safer operating at the rate for which it was designed.
DO NOT force a tool or an attachment, to do a job that it was not designed to do.
MAKE THE WORKSHOP KID PROOF
DO NOT FORCE THE TOOL
USE THE RIGHT TOOL
USE THE PROPER EXTENTION CORD
USE PROPER APPAREL
ALWAYS wear approved eye protection.
ALWAYS wear approved respiratory protection.
ALWAYS place the power ON/OFF switch in the OFF position when the saw is not in use.
ON / OFF
SECURE WORK
DO NOT OVERREACH
MAINTAIN TOOLS WITH CARE
DISCONNECT TOOLS

6
SAFETY
Consult the owner’s manual for recommended accessories. Using improper accessories may increase
the risk of personal or by-stander injury.
Serious injury could occur if a power tool is tipped, or if a cutting tool is unintentionally contacted.
Before using a power tool, check for damaged parts. A guard or any other part that is damaged should
be carefully checked to determine it would operate properly and perform its intended function. Always
check moving parts for proper alignment or binding. Check for broken parts and mountings and all other
conditions that may affect the operation of the power tool. A guard, or any damaged part, should be
properly repaired or replaced.
ALWAYS feed work into a blade or cutter against the direction of rotation. A blade or cutter should
always be installed such that rotation is in the direction of the arrow imprinted on the side of the blade
or cutter.
TURN POWER OFF - Do not leave a tool until it comes to a complete stop. Always turn a power tool
OFF when leaving the work area, or, when a cut is finished.
CALIFORNIA PROPOSITION 65 MESSAGE:
USE RECOMMENDED ACCESSORIES
NEVER LEAVE A TOOL UNATTENDED
NEVER STAND ON THE TOOL
CHECK FOR DAMAGED PARTS
DIRECTION OF FEED
WARNING
Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contain
chemicals known [to the State of California] to cause cancer, birth defects or other reproductive harm. Some
examples of these chemicals are:
• Lead,fromlead-basedpaints
• Crystallinesilica,frombricksandcementandothermasonryproductsand
• Arsenicandchromium,fromchemicallytreatedlumber
For further information, consult the following sources:
http://www.osha.gov/SLTC/silicacrystalline/index.html
http://www.oehha.org/prop65/out_of_date/6022kLstA.html
Your risk from these exposures varies depending on how often you do this type of work. To reduce your
exposure to these chemicals, work in a well-ventilated area, and work with approved safety equipment, such as
those dust masks that are specially designed to filter out microscopic particles.

7
SAFETY
Sawing and drilling generates dust. Excessive airborne particles may cause irritation to eyes, skin and
respiratory tract. To avoid breathing impairment, always employ dust controls and protection suitable to the
material being sawed or drilled; See OSHA (29 CFR Part 1910.1200). Diamond Blades improperly used are
dangerous. Comply with American National Standards Institute Safety Code, B7.1 and, Occupational Safety and
Health Act covering Speed, Safety Guards, Flanges, Mounting Procedures, General Operating Rules, Handling,
Storage and General Machine Conditions
Hazard Symbols:
NEVER touch electrical wires or components while the engine is running. They can be sources of
electrical shock which could cause severe injury or burns.
Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate the
engine with covers, shrouds, or guards removed.
NEVER tamper with the governor components or settings to increase the maximum speed. Severe
personal injury and damage to the engine or equipment can result if operated at speeds above
maximum.
(
(
)
)
on
DO NOT expose to rain or use in damp locations.
WARNING
ROTATING PARTS
ELECTRICAL SHOCK
OVER SPEED
DO NOT EXPOSE TO RAIN

8
ELECTRICAL REQUIREMENTS AND GROUNDING INSTRUCTIONS:
In order to prevent potential electrical shock and injury, the following electrical safety precautions and symbols
should be followed at all times!
In case of a malfunction or breakdown, grounding provides a path of least resistance for electric current
to reduce the risk of electric shock. This tool is equipped with an electric cord having an equipment-
grounding conductor and a grounding plug. The plug must be plugged into a matching outlet that is
properly installed and grounded in accordance with all local codes and ordinances.
• Donotmodifytheplugprovided–ifitwillnotfittheoutlet;havetheproperoutletinstalledbya
qualified electrician
• Improperconnectionsoftheequipment-groundingconductorcanresultinariskofelectricshock.
The equipment-grounding conductor is the insulated conductor that has an outer surface that
is green, with or without yellow stripes. If repair or replacement of the electric cord or plug is
necessary, do not connect the equipment-grounding conductor to a live terminal
• Checkwithaqualifiedelectricianorservicepersonnelifthegroundinginstructionsarenot
completely understood, or if in doubt as to whether the tool is properly grounded
• Useonly3-wireextensioncordsthathave3-pronggroundingplugsand3-polereceptaclesthat
accept the tool’s plug
• Repairorreplaceadamagedorworncordimmediately
This tool is intended for use on a circuit that has an outlet that looks like the one shown in Sketch A of
Figure 1. The tool has a grounding plug that looks like the plug illustrated in Sketch A of FIGURE 1. A
temporary adapter, which looks like the adapter illustrated in sketches B and C, may be used to connect
this plug to a 2-pole receptacle as shown in Sketch B, if a
properly grounded outlet is not available. The temporary adapter
should be used only until a properly grounded outlet can be
installed by a qualified electrician. The green-colored rigid ear,
lug, and the like, extending from the adapter, must be connected
to a permanent ground such as a properly grounded outlet box.
NOTE: Use of a temporary adapter is not permitted in Canada
FIGURE 1
To reduce the risk of electrocution, keep all connections dry and off the ground.
A Ground Fault Circuit Interrupter (GFCI) should be provided on the circuit(s) or outlet(s) to be used for
the Saw. Receptacles are available having built-in GFCI protections and may be used for this measure
of safety.
When using an extension cord, the GFCI should be installed closest to the power source, followed by the
extension cord and lastly, the saw.
SAFETY
WARNING
WARNING
WARNING

9
To avoid the possibility of the appliance plug or receptacle getting wet, position the saw to one side of a
wall mounted receptacle. This will prevent water from dripping onto the receptacle or plug. A “drip loop,”
shown in FIGURE 2, should be arranged by the user to properly position the power cord relative to the
power source.
The “drip loop” is that part of the cord below the level of the receptacle, or the
connector, if an extension cord is used. This method of positioning the cord prevents
the travel of water along the power cord and coming in contact with the receptacle.
If the plug or receptacle gets wet, DO NOT unplug the cord. Disconnect the fuse or
circuit breaker that supplies power to the tool. Then unplug and examine for presence
of water in the receptacle.
Use of under size extension cords result in low voltage to the motor that can result in motor burnout
and premature failure. MK Diamond warns that equipment returned to us showing signs of being run
in a low voltage condition, through the use of undersized extension cords will be repaired or replaced
totally at the customers expense. There will be no warranty claim.
To choose the proper extension cord,
• LocatethelengthofextensioncordneededinTABLE1below.
• Oncetheproperlengthisfound,movedownthecolumntoobtainthecorrectAWGsizerequired
for that length of extension cord.
To reduce the risk of electrocution, keep all connections dry and off the ground. Do not touch the
plug with wet hands.
Use only extensions cords that are intended for outdoor use. These extension cords are identified
by a marking “Acceptable for use with outdoor appliances; store indoors while not in use.” Use
only extension cords having an electrical rating not less than the rating of the product. Do not use
damaged extension cords. Examine extension cords before using and replace if damaged. Do not
abuse extension cords and do not yank on any cord to disconnect. Keep cords away from heat and
sharp edges. Always disconnect the extension cord from the receptacle before disconnection the
product form the extension cord.
FIGURE 2
Extension Cord Minimum Gage for Length
Volts Total Length of Cord in Feet
120 V 25 ft. 50 ft. 100 ft. 150 ft.
AWG AWG AWG AWG
14 12 Not Recommended
TABLE 1
SAFETY
Drip Loop
WARNING
WARNING
WARNING

10
SAFETY LABEL LOCATIONS
Safety labels are located according to Figures 1 through 3 below. The labels contain important safety
information. Please read the information contained on each safety label. These labels are considered a
permanent part of your saw. If a label comes off or becomes hard to read, contact MK Diamond or your dealer
for a replacement
Item Location Description Part No.
1A Rail – Top/Left Upper Caution – Use with Ground Fault Circuit Interrupter 155678
1B Rail – Top/Left Lower Warning – Read Owners Manual 155806
2Water Pan – Back/Left MK-112 Serial Number 160469
3Water Pan – Back/Right MK Service Information 155038
4Water Pan – Front MK-112 Title 160468
SAFETY
TILE SAW SPECIFIC WARNINGS:
Wear eye protection.
Use splash hood for every operation for which it can be used.
Disconnect saw before servicing, when changing cutting blades, and cleaning.
Replace damaged cutting blade before operating.
1 2
3
A
B
4
WARNING

11
SAFETY
PRODUCT SPECIFICATIONS
The MK-112 is a versatile Tile Saw. Operated and used according to this manual, the MK-112 will provide years
of dependable service.
General Description
Motor Specifications
Blade Capacity:
Tile Types:
The saw includes a powerful 115V electric motor. It is capable of cutting tile up to thirty-six (36) inches in length
and twenty four (24) inches diagonally. For cuts at 45°, the saw can cut to a depth of 1-3/4" and for cuts at 90°
it can cut up to a depth of 2-1/2".
Motor specifications for the MK-112 are listed in Table 2 below.
Voltage 115V
Power Consumption 650W
Frequency 60Hz
RPM 3400 rpm
Horse Power 1 hp
TABLE 2
The MK-112 uses a eight (8) inch (203mm) diameter, wet cutting continuous rim, MK Diamond blade with a
seven-eighths (7/8) inch (22.225 mm) arbor.
The MK-112 can cut a variety of tile types including stone, masonry, and lapidary products.
NOTE: The MK-112 is not designed to cut plastic, wood or metals.

12
UNPACKING, TRANSPORT and ASSEMBLY
UNPACKING
Use proper lifting techniques when lifting the MK-112
If not done yet, remove the MK-112 Saw and accessory box from the carton.
CONTENTS
TRANSPORT:
1. The MK-112 weighs approximately ninety-one (96) pounds; use care when transporting.
2. Never transport the MK-112 with water in the water pan.
The MK-112 is easy to carry by using the specially provided side handles.
Before carrying the machine make sure that:
* the motor slide is locked in place with the two Cutting Adjustment Knobs on the slide rail;
* the motor slide is completely lowered and locked with the locking lever;
* the machine is in the 45° position and that the Angle Adjustment Knobs are properly tightened;
* the feet are closed and the leg lock pin inserted.
In your container, you will find
A. One (1) MK-112 Saw
B. One (1) 8-inch wet cutting continuous rim blade,
C. One (1) Water Pump
D. One (1) 5mm wrench
E. One (1) 19mm wrench
F. One (1) 5mm Allen key
G. One (1) Protractor/Cutting guide
H. One (1) Side Table
I. One (1) owners manual and
J. One (1) warranty card.
A
Cutting Adjustment
Knobs
H I JG
D,E,F
C
B
CAUTION
CAUTION

2. Raise the leg by sliding it inside the slot.
3. Repeat the operation for the front side of the machine (See Picture 2)
4. Insert the tube-holder rod in its seat (See Picture 3).
Should it be necessary to disassemble the machine, carry out the above operations in reverse order.
PICTURE 1
PICTURE 2
PICTURE 3
13
UNPACKING, TRANSPORT and ASSEMBLY
ASSEMBLY:
Remove the machine from the packaging with the aid of the side carrying handles.
To set up the machine for work proceed as follows:
1. Remove the leg lock pin and raise the rear side (pump side) of the machine with the handle until the leg is
fully extended (See Picture 1).

14
Follow the assembly instructions to prepare your MK-112 for operation.
1. Checking before use:
THE MK-112 TILE SAW IS DESIGNED TO WORK WITH WATER
Before any cutting operation, make sure that the water level inside the water pan reaches the pump.
ADJUSTMENT OF COOLING WATER
Through an on-off valve placed on the disk protection (SEE PICTURE 5) it is possible to adjust the water flow
according to the type of material to be cut. An innovative cooling system makes it possible and allows the blade
to be always wet.
SETUP:
SETUP, ADJUSTMENT & OPERATION
PICTURE 4
Water
level
PICTURE 5
CAUTION
CAUTION

15
SETUP, ADJUSTMENT & OPERATION
3. MK-112 Setup for Operation
1. Before powering or starting, check for damage that could prevent this equipment from proper
operation or performing it’s intended function. Check for binding and alignment of moving
parts. Check for damaged, broken, or missing parts.
2. Verify the On/Off switch is in the OFF position.
3. Before connecting the MK-112 to a power supply, be sure the voltage, cycle and phase
of the job site power source meet the requirements of TABLE 3
4. Use an approved Ground Fault Circuit Interrupter (GFCI)
5. Do not cover the motor vents as this could lead to motor overheating.
VOLTAGE 115V
CYCLE 60Hz
PHASE 1-phase
TABLE 3
1. In order to avoid breaker tripping, a 20-amp circuit breaker should be used.
2. If using an extension power cord, make sure the length and wire gauge correspond to he
requirements listed in TABLE 1 on page 9. An extension power cord that is too small in wire gauge
(diameter), or too long in length, will cause the motor to overheat and could cause premature failure.
NOTE:
(B)
Plug the GFCI into the Power source
(A)
Plug MK-112 into the GFCI
CAUTION

16
SETUP, ADJUSTMENT & OPERATION
ADJUSTMENT & OPERATION
1. Cutting at 90°:
DO NOT FORCE THE TOOL. It will do the job better and safer at the rate for which it was
designed.
In order to make any diagonal cuts, position the tile against the cutting guide as shown in PICTURE 8.
PICTURE 8
Thanks to the great versatility of the MK-112 Saw it is possible to carry out different types of cuts.
Take the blade to the 0° position with the angle adjustment knobs (See PICTURE 6). Position the tile on the
support table and make sure that it is properly positioned against the cutting guide.
THE RULER PLACED ON THE WORKING TABLE HELPS ONLY WITH RIP CUTTING
PICTURE 6 PICTURE 7
Angle Adjustment Knob
CAUTION
CAUTION

17
SETUP, ADJUSTMENT & OPERATION
2. Cutting 45° Miters:
DO NOT FORCE THE TOOL. It will do the job better and safer at the rate for which it was
designed.
The MK-112 is designed with an adjustable Cutting Head for precision 45º Miter Cuts.
Take the blade to the 45° position with the Angle Adjustment Knobs (See picture 11).
Lock the motor carriage at the max. cutting depth with the locking lever (See Picture 10). Picture 10 shows the
proper way the machine should be used.
With the MK-112 Saw, it is possibe to set out:
a. the cutting length with the cut length adjustment knobs (See PICTURE 9)
b. the cutting depth with the locking lever (See picture 10)
PICTURE 11
Before any cutting, make sure that the tile to be cut is properly positioned against the cutting guide.
PICTURE 9 PICTURE 10
Cut Length Adjustment Knobs
Locking Lever
Angle Adjustment Knob
CAUTION
CAUTION

18
SETUP, ADJUSTMENT & OPERATION
CLEANUP
To clean the MK-112 Saw loosen the Side Knobs and remove the support tables.
When necessary clean the water nozzles as shown in pictures 13 and 14.
PICTURE 12
PICTURE 13 PICTURE 14
Clean the remainder of the MK-112
PICTURE 15
Side Knobs

19
MAINTENANCE AND TROUBLESHOOTING
MAINTENANCE
1. Disassembly of the Diamond Blade:
Loosen the two nuts on the blade guard and remove it. Remove the blade shaft nut with a 19mm wrench and a
5mm Allen key (provided).
PICTURE 16
THE BLADE SHAFT NUT HAS A LEFT-HAND THREAD.
After dismantling the blade guard assembly, clean the blade flanges carefully and check them for wear. You can
now install the new blade. Proceed to re-assemble the blade guard assembly and check for correct direction of
rotation as clearly indicated on the tool.
2. Motor Carriage Adjustment:
The motor carriage is provided with a register for the vertical play adjustment. If any excessive play of the motor
carriage should take place, act as follows:
1. Loosen the adjustment lock nut with a 10mm wrench (not provided);
2. Screw down the dowel with a 3mm Allen key (not provided) until the play is eliminated;
3. Tighten the adjustment lock nut.
PICTURE 17
Hold in place
Turn on this direction
to loosen
CAUTION

20
MAINTENANCE AND TROUBLESHOOTING
Like most cutting tools, a diamond blade performs best when it is dressed. Over time and use, diamonds on the
outer edge of the blade will become smoothed or “glazed” over.
This will reduce grinding efficiency and may cause the blade to “wander” or bend giving the illusion of an
alignment problem. When this occurs, the blade will need to be dressed.
The diamond blade can be dressed using the MK Dressing Stick (part number 152792) and by following the
steps below.
3. Blade Dressing
(B)
Position the Dressing Stick
(A)
Setup the MK-112 for
operation
(C)
Cut the Dressing Stick 7 or 8
times to dress the Blade