MK Diamond MK-MANTA III User Manual

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Page 1

www.mkdiamond.com

MK-MANTA III

OWNER’S MANUAL

PARTS LIST &

OPERATING INSTRUCTIONS

Revision 202

Manual Part# 161117

Caution: Read all safety and operating instructions

before using this equipment. This parts list MUST accompany the equipment at all times.

08.2012

Page 2

INTRODUCTION

Congratulations on your purchase of a MK-Manta III Core Drill. We are certain that you will be pleased with your purchase. MK Diamond takes pride in producing the nest construction power tools and diamond blades in the industry.

Operated correctly, your MK-Manta III Core Drill 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-Manta III Core Drill safely and correctly. Please take the time to familiarize yourself with the MK-Manta III Core Drill by reading and reviewing this manual before operating it.

Read and follow all safety, operating and maintenance instructions.

If you should have questions concerning your MK-Manta III Core Drill, please feel free to call our friendly customer service department at: (800) 421-5830.

Regards,

MK Diamond

NOTE THIS INFORMATION FOR FUTURE USE:

MODEL NUMBER:

SERIAL NUMBER:

PURCHASE PLACE:

PURCHASE DATE:

NOTE: For your (1) one year warranty to be effective, complete the warranty card

(including the Serial Number) and mail it in as soon as possible.

Page 3

TABLE OF CONTENTS

SAFETY

Safety Messages 4 Damage Prevention Message 4 General Safety Precautions 4-5 Hazard Symbols 5 California Proposition 65 Message 6 Safety Label Locations 7 Product Features 8

UNPACKING, CONTENTS and ASSEMBLY

Unpacking 9 Contents 9 Assembly 9

OPERATION

Operation 10-15

MAINTENANCE, ACCESSORIES, & TROUBLESHOOTING

Maintenance 16 Cleanup 16 Troubleshooting 17-18 Accessories 19

EXPLODED VIEW AND PARTS LIST

Exploded View & Parts List 20-29

ORDERING and RETURN INSTRUCTIONS

Ordering Information 30 Return Material Policy 30 Packaging Instructions 30 Authorized Service Centers 30

CONTACT and LIMITED WARRANTY

Contact 31 Limited Warranty 31

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MANTA CORE DRILL III SAFETY

RULES FOR SAFE OPERATION

DANGER

Failure to follow instructions in this manual may lead to serious injury or even death! This equipment is to be operated by trained and qualied personnel only! This equipment is for industrial use only.

The following guidelines should always be used when operating the core drill.

SAFETY MESSAGE / ALERT SYMBOLS

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.

Each message tells you what the hazard is, what can happen, and what you can do to avoid or reduce injury. Other important messages are preceded by the word NOTICE.

NOTICE

You can cause PROPERTY DAMAGE to your machine if you don’t follow directions.

The safety labels should be periodically inspected and cleaned by the user to maintain good legibility at a safe viewing distance. If the label is worn, damaged or illegible, it should be replaced. Contact MK Diamond or your dealer for replacement.

CAUTION

Always keep alert. Do not allow familiarity (gained from frequent use) to cause a careless mistake. Always remember that a careless fraction of a second is sufcient to inict serious injury.

GENERAL SAFETY

• DO NOT operate or service this equipment before reading this entire manual. Read and understand all warnings, instructions and controls on the machine.

• This equipment should not be operated by persons under 18 years of age.

• NEVER operate this equipment without proper protective clothing, shatterproof

glasses, steel-toed boots and other protective devices required by the job.

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MANTA CORE DRILL III SAFETY

• NEVER operate this equipment when not feeling well due to fatigue, illness or taking medicine.

• NEVER operate this equipment under the inuence of drugs or alcohol.

• Whenever necessary, replace nameplate, operation and safety decals when they be come difcult

to read.

• ALWAYS check the machine for loose bolts and parts before starting.

• ALWAYS wear proper respiratory, head, ear and eye protection

equipment when operating this machine.

• Use the right tool. Do not use a tool or attachment to do a job for which it is not recommended. Do not alter the tool. Maintain all tools with care for the safest and best performance.

• ALWAYS store equipment properly when it is not being used. Equipment should be stored in a clean, dry location out of the reach of children.

• ALWAYS insure that the switch is off before plugging unit into electrical power.

• NEVER leave the drill running unattended. Turn power off.

• DO NOT over reach, maintain control. Keep proper footing and balance at all times. Maintain a

rm grip.

• Should any part of this drill become missing or damaged, or any component fail to perform

properly, shut off the drill and unplug the power source. Replace the missing, damaged, and/ or failed part before resuming operations.

ELECTRICAL SHOCK

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.

ACCIDENTAL STARTS

Before starting the equipment, be sure the ON/OFF switch is in the “OFF” position to prevent accidental starting. Place the ON/OFF switch in the OFF position before performing any service operation.

ROTATING PARTS

Keep hands, feet, hair, and clothing away from all moving parts to prevent injury. Never operate the motor with covers, shrouds, or guards removed.

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MANTA CORE DRILL III SAFETY

SILICA DUST WARNING

Grinding/cutting/drilling of masonry, concrete, metal and other materials with silica in their composition may give off dust or mists containing crystalline silica. Silica is a basic component of sand, quartz, brick clay, granite and numerous other minerals and rocks. Repeated and/or substantial inhalation of airborne crystalline silica can cause serious or fatal respiratory diseases, including silicosis. In addition, California and some other authorities have listed respirable crystalline silica as a substance known to cause cancer. When cutting such materials, always follow respiratory precautions.

Use appropriate NIOSH-approved respiratory protection where dust hazard may occur. Paper masks or surgical masks without a NIOSH approval number are not recommended because they do little to protect the worker. For more information about respirator programs, including what respirators have received NIOSH approval as safe and effective, please visit the NIOSH website at:

http://www.cdc.gov/niosh/topics/respirators

Observe OSHA regulations for respirator use (29 C.F.R.§1910.134 and §1503.1). Visit http://www.osha.gov for more information.

CALIFORNIA PROPOSITION 65 MESSAGE

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

• Arsenic and chromium, from chemically treated lumber

For further information, consult the following sources:

http://www.osha.gov/dsg/topics/silicacrystalline/index.html http://www.cdc.gov/niosh/docs/96-112/ http://oehha.ca.gov/prop65/law/P65law72003.html http://www.dir.ca.gov/Title8/sub4.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 dust masks that are specially designed to lter out microscopic particles.

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MANTA CORE DRILL III SAFETY

SAFETY LABEL LOCATIONS

Safety 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.

Label A

WARNING

Grinding/cutting/drilling of masonry, concrete, metal and other materials with silica in their composition may give off dust or mists containing crystalline silica. Silica is a basic component of sand, quartz, brick clay, granite and numerous other minerals and rocks. Repeated and/or substantial inhalation of airborne crystalline silica can cause serious or fatal respiratory diseases, including silicosis. In addition,California and some other authorities have listed respirable crystalline silica as a substance known to cause cancer.

WARNING

For Your Own Safety Read Instruction Manual Before Operating Saw. Wear Eye Protection. Disconnect Saw Before Servicing, when Changing Cutting Wheels and Cleaning. Use Tool Only with Smooth Edge Cutting Wheels Free of Openings and Grooves. Replace Damaged Cutting Wheel Before Operating. Do Not Fill Water Bath Above Water Fill Line. See Manual for Pump Replacement.

FOR INFORMATION ON

SERVICE OR

WARRANTY

PLEASE CALL

1-800-474-5594

Label B

Label C

B & C

Decal/Label Location Description

A Base - Top Warning Silica B Vacuum - Top Service or Warranty C Vacuum - Top Read Manual

Page 8

MANTA CORE DRILL III FEATURES

MK-MANTA III CORE DRILL

The MK-Manta III Core Drill is a powerful all-purpose drilling rig that is designed to drill holes, up to 12 inches in diameter (14 inches with the 2 inch spacer), in all types of concrete slabs, oors, walls, and ceilings. The MK-Manta III Core Drill is designed for easy anchoring using masonry anchors. A vacuum pump is provided to facilitate quick and easy anchoring to smooth oor surfaces.

MOTOR

The MK-Manta III Core Drill is designed for use with a variety of motors. All motors are powerful two or three speed units that provide the correct cutting speed over a range of diamond drill sizes.

CARRIAGE, COLUMN AND BASE

The carriage, column and base assembly of the MK-Manta III Core Drill is the strong, sturdy drilling platform that provides the rigidity needed to quickly drill accurately placed, straight, smooth holes in all types of concrete. The MK-Manta III’s base is slotted to provide easy anchoring of the drill, in a variety of drilling situations, with a single masonry anchor. The slot also allows more than one hole to be drilled from a single anchor location. The base contains four leveling screws to insure accurate hole alignment even on uneven concrete surfaces. The carriage also has a handle and the base has 6” wheels to provide easy transport. The carriage travel is controlled by a strong rack and pinion gearsystem, that can be locked at any point on the column. The single spoked sliding handle allows that operator to easily control the drilling pressure and speed. At the top of the column is a strong jackscrew that allows for additional bracing to overhead or opposite surfaces.

VACUUM PUMP

The vacuum pump provides quick and reliable mounting to smooth concrete slab and oor surfaces. The powerful vacuum pump provides 25 PSI of holding power which equates to over 1800 pounds of force, holding the MK-Manta III Core Drill securely, for safe, accurate drilling. The pump has a quick disconnect connector on the hose at the base.

WATER SYSTEM

The water system for the MK-Manta III Core Drill is a simple hose hook-up and shut-off valve that provides water under pressure to the diamond drill bit. The water travels to the center of the bit through the water swivel and spindle to insure that water is supplied to the cutting end of the bit, even is deep drilling operations.

General Specifications

Motor 120V

Bit Capacity 1/2” to 14” (16” with motor spacer)

Bit Feed 27"

Motor Spindle 1 - 1/4” - 7

Column 2 -1/2” x 2 - 1/2” adjustable rack and pinion

Weight-combo Base 109 lbs. (including pump)

Weight-Combo Tilt Base 114 lbs (including pump)

Weight-Anchor tilt Base 95 lbs.

Size L x W x H

L x W x H (mm)

19” x 24” x 46” 480 x 610 x 1170

Page 9

MANTA CORE DRILL III CONTENTS

UNPACKING

Open the accessory pack and check each item with the contents list, making certain that all items are accounted for and in good condition before discarding any packing material. If there are any missing or damaged parts, call our toll free number 1-800-421-5830 for instructions before proceeding with the assembly.

Contents of the carton: It varies depending on model. MK-Manta III Core Drill (including column, carriage, base and motor), Vacuum Pump and Accessory Pack.

Contents of the Accessory Pack: Control box, meter box knob, leveling screw (4), feed handle (1) and knobs (2), water valve, vacuum base gasket, wrench, MK-Manta III manual, MK Diamond warranty card, motor manual and motor warranty card.

www.mkdiamond.com

Revision 202

Manual Part# 161117

Caution: Read all safety and operating instructions

before using this equipment. This parts list MUST accompany the equipment at all times.

MK-Manta III

MK DiaMonD Warranty CarD

Name

address

City

state zip Code

phoNe Fax

e-mail

produCt model

part NumBer

maChiNe serial#

where did you purChase this saw From ? N a me

q tile distriButor q home CeNter q equipmeNt supply house

q tool supply q Bldg material supply q reNtal equipmeNt house

are you a do-it-yourselFer

q or CoNtraCtor q IF so, what type? tile q masoNry q other

what Criteria was importaNt iN ChoosiNg this saw? (rate From 1 to 5, 5 BeiNg the most importaNt)

power preCisioN por taBility availaBility other

priCe

CommeNts or suggestioNs:

mK diamoNd warraNty

1315 Storm Parkway, Torrance, CA 90509 USA | www.mkdiamond.com | 1.800.421.5830 | 1.310.539.5158

If within one (1) Year from the date of purchase, this MK Diamond saw fails due to defect in material or workmanship, MK will repair it, free of charge when the unit is returned to the dealer where it was purchased. This warranty DOES NOT cover normal wear or damage resulting from operator abuse. In no event shall MK Diamond Products, Inc. be liable for consequential damages arising out of the failure of any product if operated improperly. MK Diamond Products may act as a warranty station for motor/engine repairs based on an individual agreement with the manufacturer. This warranty is in lieu of all other warranties express or implied.

date purChased

Warranty

Card

ASSEMBLY

Feed Handle and Meter Box

WARNING

For your own safety and protection, do not attempt to operate this drill until it is completely assembled and installed according to these instructions, and until you understand the machines capabilities and the potential hazards associated with it.

OWNER’S MANUAL

OPERATING INSTRUCTIONS

08.2012

Owners

Manual

MK-MANTA III

PARTS LIST &

Vacuum Pump

(Combination Models Only)

Accessory Pack Control Box

Step 1: Slide carriage assembly onto column. Assemble handle and hub.

Vacuum Gasket

Turn the vacuum base over. Press the gasket into the groove in the underside of the base. The gasket is cut at the factory to the correct length so that the two ends will butt together once the gasket is installed.

Step 2: Assemble the two pieces of the water valve, and install the valve into the water swivel on the motor, just above the spindle (see Milwaukee literature).

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MANTA CORE DRILL III OPERATION

Final Assembly

Plug the cord from the motor into the upper outlet on the meter box (the one opposite the motor on-off switch). The other outlet on the meter box is for use with the vacuum pump.

DRILLING OPERATIONS

Electrical Requirements

The MK-Manta III Core Drill rig has been equipped with a Milwaukee motor. The drill should be used on an electrical circuit, separate from other loads, and protected by a 30 amp circuit breaker. the MKManta III Core Drill has been provided with a 20 Amp plug (NEMA 15-20) or a 30 Amp (NEMA 15-30) locking plug depending on the model.

Grounding

The MK-Manta III Core Drill is marked “Grounding Required” and has a three wire cord and three prong grounding plug. The plug must be connected to a properly grounded outlet (see gure below). If the tool should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user, reducing the risk of electrical shock.

The grounding prong in the plug is connected through the green wire inside the cord to the grounding system in the tool. The green wire in the cord must be the only wire connected to the toll’s grounding systems and must never be attached to an electrically live terminal.

Your tool must be plugged into an appropriate outlet, properly installed and grounded in accordance with all codes and ordinances.

WARNING

Improperly connecting the grounding wire can result in the risk of electric shock. Check with a qualied electrician if you are in doubt as to whether the outlet is properly grounded. Do not modify the plug provided with the tool. Never remove the grounding prong from the plug.

EXTENSION CORDS

Do not use the tool if the cord or plug is damaged. IF damaged, have it repaired by an authorized service facility before use. If the plug will not t the outlet, have a proper outlet installed by a qualied electrician. The use of a circuit protected by a ground fault interrupter (GFCI) is highly recommended.

Use extension cords of the proper cable size, referring to the following chart.

EXTENSION CORD MINIMUM GAGE FOR LENGTH

TOTAL LENGTH OF CORD IN FEET

Cord Length 25 ft. AWG 50 ft. AWG 75 ft. AWG

Wire Size (AWG) #10 #8 #6

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MANTA CORE DRILL III OPERATION

WARNING

NOTICE:

SECURING THE RIG: RECOMMENDED METHODS

A. USE A CONCRETE ANCHOR. Use either a 1/2 or 5/8 concrete anchor to secure the base to the

work surface. Always be sure to level the rig and tighten the lock nuts on the leveling screws before tightening the anchor. Using a concrete anchor, insert a bolt through the slot located on the base and tighten the bolt rmly in the anchor.

WARNING

Never use a extension cord smaller than shown in the chart. Be sure your extension cord is properly wired and in good electrical condition. Always replace a damaged extension cord or have it repaired by a qualied electrician before using it. Protect your extension cords from sharp objects, excessive heat and damp or wet areas.

Using an extension cord with inadequately sized wire causes drop in voltage, resulting in loss of power and possible tool damage.

It is essential to always secure the rig to the work surface to help prevent personal injury and also to protect the rig. An unsecured rig could rotate during drilling and possibly cause injury. It could also cause the bit to chatter against the work surface or bind in a hole, which can fracture the diamond. Always test the anchor for rm attachment before drilling.

B. VACUUM BASE. The MK-Manta III Comb Core Drill Rig is equipped with a vacuum pump. This pump is designed to provide approximately 1800 pounds of total holding power. In order to provide the most rigidity to your core rig the unit should be used on a relatively smooth surface such as concrete. If the surface is too porous or rough the vacuum mount may not hold securely.

1. Turn the vacuum pump on and step on the vacuum base until a vacuum is created and the

base adheres to the work surface.

2. Level the rig using the leveling bolts. Use a minimum amount of adjustment to the leveling

bolts to avoid breaking the vacuum seal.

The vacuum gauge should read approximately 25 pounds per square inch (PSI) of pressure. If the gauge reads 20 PSI less, check the work surface for conditions which may interfere with adequate suction such as cracks, dirt or debris on a porous surface.

WARNING

C. ADDITIONAL SUPPORT. For added rigidity, you may use a telescoping extension assembly in

conjunction with a concrete anchor or vacuum base. To use a telescoping assembly, rst level the rig with the leveling screws. Secure the rig with an anchor or the vacuum base. Place the top ange of the extension against a ceiling or wall and place the other end on the jack screw of the column. The assembly is adjustable up to 14 feet. Specications for the different motors are listed in the table below.

Do not drill if the gauge reads less than 20 PSI. Do not use vacuum base on cracked, uneven, porous or vertical surfaces.

Page 12

MANTA CORE DRILL III OPERATION

DRILLING SPEEDS

Bit Capacity 1/2" to 14"

Spindle 1-1/4"-7

Bit Feed 27"

L x W x H (inches)

L x W x H (mm)

Volts / Amps 120V / 20A 120V / 15A 120V / 20A 120V / 20A 120V / 15A

Motor RPM 300/600 375/750 450/900 450/950 500/1,000

Horsepower 1 HP 1 HP 1 HP 1 HP 1 HP

19" x 24" x 46" 480 x 610 x 1,170

Motor Milwaukee

4004

Clutch Slip Clutch Shear Pin Shear Pin Slip Clutch Slip Clutch

Milwaukee 4090

Milwaukee 4094

Milwaukee 4096

Milwaukee 4097-20

Combination

Base Drill

Stand

Includes Vacuum

Combination

Tilt Base Drill

Stand

Includes Vacuum

Anchor Tilt

Base Drill

Stand

Anchor Base

Drill Stand

Weight 109 lbs. 109 lbs. 109 lbs. 109 lbs. 109 lbs.

Part# 158639 158641 157449 157448 158640

Weight 114 lbs. 114 lbs. 114 lbs. 114 lbs. 114 lbs.

Part# 158647 158649 158644 158645 158648

Weight – 95 lbs. 95 lbs. 95 lbs. 95 lbs.

Part# – 158657 158652 158653 158656

Weight – 74 lbs. 74 lbs. 74 lbs. 74 lbs.

Part# – 167324 167325 167326 167327

The MK-Manta III Core Drill, with Milwaukee motor will operate in either a high or low gear speed. This speed combined with applied pressure provides the cutting action for the core bit. Speed selection and pressure are determined by hardness of material, aggregate size and grade of diamond core bit. Generally, harder material and larger aggregates require more speed and pressure. Use low speed for large diameter bits and high speed for small diameter bits. Changing of the speeds is accomplished by using the speed shift lever built into the gear case.

NOTICE:

Change the gears only when the motor is off.

All building materials and work surfaces are composed of aggregates of various size. Aggregates are materials such as gravel or crushed stone. The size of the grains and the hardness of the material affects the speed of drilling. Most building materials contain some type of steel reinforcements. All MK-Manta III bits are designed to cut through these types of reinforcing steel. However, bits should never be used for drilling solid steel plates. Proper selection of the diamond core bit should be based on material to be drilled and performance requirements.

Page 13

MANTA CORE DRILL III OPERATION

DRILLING PRESSURE AND THE AMMETER

Steady, even pressure assures accurate holes and longer bit life. Always maintain consistent pressure so that the bit is constantly cutting.

NOTICE:

WATER SUPPLY

An adequate supply of clean water is necessary for drilling. Connect the water supply hose to the hose tting on the output of the core drill motor. Take precautions that the water supply will not be interrupted during the drilling operations.

NOTICE:

CARRIAGE RIGIDITY

Too much pressure will damage the bit and motor. Too little pressure will glaze over the diamonds, reducing cutting efciency and prematurely wearing the bit. The ammeter is the gauge on the Control Box. It provides pressure feedback information during drilling, allowing the operator to help prevent motor overload and premature bit wear. The green areas are the operating range, and the red area is the overload range. Generally, the operator should keep the ammeter needle in the upper area of the operating range for large diameter bits, and in the lower green area for small diameter bits. If the bit contacts steel reinforcing rods, the needle on the ammeter may jump slightly showing a heavier load. If this occurs, do not decrease pressure or you may damage the diamonds. The MK-Manta III Core Drill may be operated with the ammeter needle into the red area for the short period of time that it takes to cut through a steel rod.

If a bit is run dry it can be ruined in a few seconds.

It is essential that the carriage ts snugly on the column to prevent the motor or bit from wobbling during drilling. Through normal use the carriage may loosen from the column and begin to wobble. Before drilling, always make sure the carriage is rigid by trying to wiggle it with your hand. If the carriage is secure it should not move. If it does move, tighten the adjustment. Tighten only enough to remove the play. Do not over tighten.

SHEAR PIN AND CLUTCH PROTECTION

The MK-Manta III Core Drill uses either a shear pin or a friction clutch to protect the gear and motor against overload. The shear pin drives the outer portion of the drive spindle. If the motor should overload the pin will shear. Extra shear pins are supplied or can be ordered from MK Diamond’s Customer Service. Tighten only enough to remove the play, do not over tighten. Another model features a friction clutch rather than a shear pin to protect the motor and gears. If the motor overloads the clutch will begin to slip and the bit will stop rotating. The clutch is factory-set and does not require adjustments. However, under normal use, the clutch may start to slip at low torque. If this happens, refer to the motors Owner’s Manual.

Page 14

MANTA CORE DRILL III OPERATION

MOUNTING BITS

Bits with permanently attached adapters simply screw directly onto the threads of the drill spindle. Ensure that the end of the bit butts up squarely against the shoulder on the spindle.

• Thread anti-clockwise to attach core bit.

• Thread clockwise to loosen.

WARNING

DRILLING PROCEDURE

When drilling through concrete oors, the core will generally drop from the diamond bit. Caution should be provided for people and property below the drilling area.

1. Ensure that you have read and fully understand the complete operation of the Manta III Core Drill you have purchased prior to commencing drilling operations.

2. Select and install a diamond core bit appropriate for the job.

NOTE:

3. Select either high or low gear speed according to the chart in the Drilling Speeds section of

this manual. (Do not shift speed when motor is on.)

4. Connect water hose to water swivel.

5. Secure the rig as described in the Securing the Rig section of this manual.

The MK-Manta III Core Drill, equipped with either the Millwaukee motor, has a 1 -1/4” - 7 thread. For bits with other threads, use a shaft coupling. After a bit has been mounted, turn the power on and check that there is a minimum of run-out or wobble.

To reduce the risk of injury, always unplug tool before attaching or removing accessories. Only use specically recommended accessories. Others may be hazardous.

Grease the bit threads to help prevent the bit from seizing on the spindle due to surface corrosion.

WARNING

6. Turn the motor switch on the control box on. Turn the water on so that an adequate ow

of water is supplied through the water swivel to the bit. Hold the sliding handle and slightly loosen the carriage lock knob. Slowly rotate the handle to lower the bit into the work piece - apply steady even pressure.

NOTE:

7. Use consistent pressure so that the bit cuts consistently, Insufcient pressure will cause

the diamond core bit to glaze over. Too much pressure will overload the motor and crush the diamonds. Use the ammeter on the control box as a guide for proper pressure.

If using the vacuum base, do not continue operations unless the vacuum gauge reads more than 20 PSI. Normally, the gauge will read 23 inches or more.

To prevent the bit from wandering, always use a light lead to start the hole and wait for the diamond tip of the bit to penetrate the work surface before increasing the load.

Page 15

MANTA CORE DRILL III OPERATION

CAUTION

8. Monitor the water ow. If the water ow is adequate, the water leaving the cut should be

slightly sludgy. When cutting metal rebar, the water should have a gray metal coloring.

NOTICE:

9. When the cut is complete, keep the drill motor on and rotate the sliding handle to bring the

bit up out of the hole. The bit may become stuck if the motor is turned off before the bit is completely clear of the hole. Once the bit is clear of the hole, tighten the carriage lock knob, turn off the motor and the water supply.

NOTE:

If the rig shifts during drilling, stop the motor, reposition the rig, and resume drilling.

When drilling into prestressed concrete the bit may cut into the hardened steel cable under tension. As the bit cuts through each strand, the tension in the cable is released. The diamond segments on the bit crown can be damaged by the loose wires. The best prevention for bit damage is to use a core bit designed especially for drilling in prestressed concrete.

Normally the core will drop out of the bit, and remain in the hole. However, in cases where the core sticks in the bit, it is sometimes necessary to push the core up and down with the water running to allow the core to drop out. Sometimes very light tapping on the barrel of the bit with a piece of wood will loosen the core.

CAUTION

DEEP DRILLING

When drilling holes that are longer than the core bit, follow the steps below.

1. Begin drilling the hole as usual. When you have drilled to the length of the bit, retract the bit from the hole and turn off the motor and water as usual.

2. Break off the core by driving a chisel or slender wedge into the circular kerf. Remove the core using core tongs, bent music wire or anchor bolts.

3. After removing the core, insert the bit carefully into the hole, attach a bit extension to the bit and core drill rig, then continue drilling as usual.

Perform the above action only with the motor turned off and the unit unplugged to prevent accidental starting and injury. Exercise extreme caution in hand placement when removing a stuck core, as the core can be heavy and inict injury.

Page 16

MANTA CORE DRILL III MAINTENANCE

MAINTENANCE

Periodic maintenance, including cleaning, lubrication and inspection for wear and damage are routine servicing procedures. Following the procedures as outlined can prevent serious damage or malfunctioning of the machine, and aid in preserving the useful life of core drill bits.

CAUTION

Before performing any maintenance to the MK-Manta III Core Drill, always unplug the unit from the electrical power source. Ensure the On-Off switch is in the Off position, after servicing, and before plugging the unit back in.

CLEANING

Clean the machine after use, being careful to remove dust and slurry from the motor, vents, carriage and column. Keep tool handles clean, dry and free of oil and grease. Use only mild soap and a damp cloth to clean this tool since certain agents and solvents are harmful to plastics and other insulated parts.

WARNING

Never use ammable or combustible solvents around tools.

VACUUM BASE GASKET

Through normal use, the rubber gasket on the underside of the vacuum base can become worn, requiring replacement. Periodically check the gasket for wear. If replacement is required, clean the groove in the base before installing a new gasket.

Page 17

MANTA CORE DRILL III TROUBLESHOOTING

TROUBLESHOOTING

PROBLEM WHAT TO DO? INDICATION CAUSE SOLUTION/

RECOMMENDATIONS

Low Penetration Rate Under Prevailing Drilling Parameters.

Heavy Wear at Steel Tube

1. Check uid return. Fluid not muddy. Evidence of steel cuttings.

2. Check motor

speed range.

3. Check wear

picture of bit face.

Bit worn out Replace with new bit. Diamond without

exposure. (ush with bond matrix)

Face of bit plugged with cuttings

Face of bit covered with steel. Steel cuttings stick to bit face.

Wear picture of polished diamonds.

Deep grooves. Worn or open

Heavy Wear. Bit is deformed. Replace bit.

Drilling in steel reinforcement.

Speed not correct for the bit size used.

Insufcient bit load.

Rotated with high RPM on reinforcement

Loose material at bottom of hole.

Not enough uid pumped. Cuttings burnt to matrix. Diamonds prevented from cutting.

Steel cuttings stick to bit face. Diamonds prevented from cutting.

Bit load too low. Increase bit load.

Bit speed too high

guide ways on cradle. Borehole is getting undulated.

Protruding steel. Spindle is offset. Bit out of true.

Poor cleaning of abrasive cuttings.

Crown clearance worn out.

Adjust drilling parameters to recommendations for reinforcement.

See recommended speeds.

Increase bit load.

Reduce RPM, or resharpen bit.

Break core, clean bottom of hole or reduce RPM and drill with increased bit load.

Clean bit face by sharpening methods such as drilling dry at low RPM in a concrete block 3/8” deep max. Increase water ow rate.

Clean bit face by drilling in abrasive concrete block. Reduce RPM.

Use lower speed; increase bit load.

Adjust guidance on carriage.

Adjust guidance on carriage. Nicks or dirt on mounting faces.

Improve ushing.

Replace bit.

Page 18

MANTA CORE DRILL III TROUBLESHOOTING

TROUBLESHOOTING

PROBLEM WHAT TO DO? INDICATION CAUSE SOLUTION/

RECOMMENDATIONS

No return of uid

Bit Stuck

Check where uid is leaking.

1. Try to raise bit, if possible.

2. Stop rotation.

Loose material (cut steel or aggregates) is blocking between core and bit or between borehole and bit.

If Leaking can be tolerated, continue drilling with increased attention.

Step 1: Apply wrench and rotate bit in both directions while bit is under tension. If not successful:

Step 2: Try to over drill a hole slightly larger then the stuck bit.

Shear Pin Fail

1. Stop rotation.

2. Raise bit.

Drill moved during drilling (poor fastening)

Bit deviates, guide ways on cradle have too much clearance.

No clearance between tube I.D. or O.D. and crown I.D. or O.D.

Drill impacted to stall at lower speeds.

Disconnect bit and remove, break core. Start over with improved fastening of machine.

Disconnect machine, adjust guid-

ance.

Replace bit.

Use recommended speed for the bit diameter used. Raise bit when it begins to load down. Feed bit slowly when chattering begins.

Page 19

MANTA CORE DRILL III ACCESSORIES

ACCESSORIES

ITEM NUMBER DESCRIPTION

Core Bits MK-Black- Supreme Grade for

Concrete & Asphalt

www.MKDiamond.com

3 www.MKDiamond.com

4 www.MKDiamond.com

Excellent performance in applications associated with moderate to high steel reinforcement.

Available Diameters 1/2” - 16” Core Bits MK-Orange- Premium Grade for

Concrete & Asphalt

MK-Orange is a premium bit designed for wet drilling applications that include light to moderate steel reinforcement.

Available Diameters 1” - 16” Core Bits MK-Yellow- Standard Grade for

Concrete & Asphalt

MK-Yellow is an excellent choice for all types of general wet drilling.

Available Diameters 1” - 14”

Core Bit Extensions Multiple tube extensions may be used extending the drilling depth in increments of 12”.

Available Diameters 1 - 1/4” to 6 /14”

304149

304150

6 159620

Shaft Extensions easily attach to the core bit and allow for a deeper drilling capacity. 12” Length

5/8” - 11 Male / 5/8” 11 Female

1 - 1/4” - 7 Male / 1 - 1/4” - 7 Female

Motor Spacer kit for Manta IIII core drill rigs with Milwaukee motors. Allows rigs to use 16” bits.

Page 20