makita DBM130 Diamond Core Drill Instruction Manual

makita DBM130 Diamond Core Drill

Technical Characteristics

• Rated voltage: 110 V
• Rated power input: 1500 W
• Load speed: 1st speed 0 – 1000 min-1
• 2nd speed 0 – 2000 min-1
• Drilling capacity up to: 132 mm
• Protection class: II
• Collet: M 18
• Weight(net): 5.5 kg
• Collar clamping diameter: 53 mm

Diamond drill motors are designed for professionals and should onry be used by authorized persons. All rights of changes due to technical development reserved.

Safety Instructions

ADDITIONAL SAFETY RULES FOR THIS MACHINE

• Disconnect from mains supply whenever any work, servicing and adjustment or change of accessories and cutters is required.
• Only grip by insulated part of auxiliary handle and other plastic surfaces when performing drilling where cutter is likely to contact hidden electrical wiring or its own cable. Contact with a “Live” wiring will make all exposed metal surfaces of the machine “Live” and danger for an electric shock.
• Before using the machine, inspect and check power cord and plug for signs of damage and if any found, have these repaired or replaced immediately. Plug the cord in only after making sure that mains switch is OFF.
• Machine should never be damp or wet. Do not use the machine in damp or wet locations.
• For longer machine use, wear hearing protectors.
• Likewise it is recommended to wear safety helmet, safety glasses and/or face shield. Also wear a dust mask and thickly padded gloves.
• Prior to work starting, make sure that cutting accessory is fitted properly.
• Before starting work carefully check all screws for tightness. Due to vibration screws come loose and can cause serious breakdown or injury.
• Keep sure-footing and body balance at all times for better control of reaction torque.
• Make sure no one is below when using the machine in high locations.
• Keep hands well away from rotating parts.
• When working this tool always use auxiliary side handle and hold the machine firmly with both hands. Keep secure stance.
• Do not leave the machine running unattended. Switch ON only when hand-held.
• Avoid touching near dry-cut immediately after work process. Area can be very hot and cause severe burns.
• To avoid machine self-starting, always trigger-off the switch should power supply become interrupted or plug accidentally withdrawn from the socket while motor is still running.

Main Instructions

• Auxiliary Handle
  • In hand held drilling operations, only use the machine with the auxiliary handle fixed. This handle must be tighten on the collar, by turning the lever.
• ON/OFF Setting
  • The machine is equipped with an electronic ON/OFF switch. The more the switch is pressed, the higher is the speed. This allows very precise drilling. In nomal working conditions, always work at maximum speed.
• Gear Shifting
  • Choose the proper speed according to the drill bit size used. Select at the speed selector by pressing-in, shifting and engaging. If the selector is on “ O ”position, the speed can vary up to 1000 min-1. This speed is recommended for diameter between 82 and 132 mm. If the selector is on “ OO ”position, the speed can vary up to 2000 min-1 and this speed is recommended for diameter up to 80 mm.
  • CAUTION !: – always check the drill bit manufactures recommendation for use gear shifting only when the machine is stopped and clockwise !
• Starting a Hole
  • It is always easier to start a hole with centering bit. The electronic switch allows to drill at slow speeds in order to safely introduce the bit in the material (5-10 mm). Once engaged in the material the centering device (bit) can be removes from the machine and drilling at full speed can start then.

Overload Protection

• In order to protect the operator and the machine, the unit is equipped with 3 protections against overload: – mechanical – electronic – thermal mechanical: If the drill bit is suddenly blocked in the hole, a clutch will slip, disengaging the bit from the motor.
• CAUTION ! In case of sudden blocking there may occure a strong turning back torque.
• Therefore, for handheld use, the machine must be held with both hands and it must be worked with full concentration. Ensure a safe stand.
• Electronic: If the operator overload the machine because of excessive penetration speed, the electronic protection will stop the electric supply for a short while. After discharge and reengagement, one can drill again.
• Thermal: When continuos overload is applied (despite the electronic device) a thermal protection will protect the motor from destruction. When the thermal overload protection has worked, it is not possible to start the machine immediately after. It is only after some cooling time that the machine can be restarted. The time needed to be able to restart the machine will be vary to the overheating of the coil and the ambient temperature.
• Acoustic warning: In case of overload, a continuis acoustic signal sounds. When this occurs, it is recommended to decrease the and/ or cool it down while rotaring without load.
• Important notice: The stop of the machine caused by overload protection is no failure. After an adequate time it is possible to restart working!

Dust Exhaust
We recommend a dust exhaust for dry drilling. This is health protection, protection against soiling and a condition or optimal cutting conditions. We offer fitting to the DBM130 a dust exhaust and vacuum cleaner as special accessories.

Care and Maintenance

• Before all works at the machine, make sure that the plug is off the mains socket.
• Due to its design, the machine needs a minimum of care and maintenance.
• Nevertheless you should always observe the following:
•  Keep the electric tool clean.
•  Avoid any particle or part to penetrate inside the tool.
•  If the machine is defect let carry out a repair only through an authorized service workshop.

Instructions for Using Diamond Core Drilling Bits

• Dry Drilling
•  Only perform dry core-drilling on brickwork and soft lime or soft sand stones.
• Vacuum the dust away. Rock and masonry dust is harmful. We strongly recommend you to wear a face shield as well. Employ suitable type of vacuum and which also have ample of suction power. Plentiful suction air offers additional benefit of cooling the core drill’s body and free of dust, running more freely. Moving core drill slightly back every now and then during coring process will make dust extraction more effective. In doing so make sure not to tilt the core drill bit, as this will substantially shorten its useful life.
• Use solid pilot inserted into the core-bit until a starting groove about 5mm deep is cut. Then remove pilot bit, otherwise it will start overheating and become unnecessarily defective. Alternatively you can also use separate hammer drilling machine to make a pilot hole which then renders removal of the pilot from core bit unnecessary.
• Wet Drilling
• Concrete and natural (hard) stone must be core-drilled wet.
• Ensure sufficient water flow. There has to be enough water to flush all the residue out of the groove. A 100mm diameter core can require up to 5 lit/min of water supply. If using pressurised water container, make sure it will deliver the required amount.
• Starter hole guides and drill rigs assist accurate starts and guidance. These are also available with a water collecting facility. If neither starter hole guide nor drilling rig are available, use wooden template to ensure drilling starts in the proper place.
  • When using drilling rig, make sure that:
  •  drilling machine is mounted securely;
  • the feed control is engaged and that drill does not move by its own weight;
  •  the stand is mounted securely.
  • Improperly secured drilling rigs can cause jamming of the core bit and breakage of the segment(s).
• For safety, the drill stand should be secured in one of the following ways:
  • with bolt anchor, washer and quick fastening bolt (use anchor for at least 50mm setting depth).
  •  with vacuum base (vacuum kit and pump required)
  •  masonry or other work substrate surface need to be flat, cracks and pores free. This method is not suitable for tiled surfaces. When drilling horizontally (wall) or ceiling drilling, additionally secure the drill to prevent falling by the use of straps or rope.
  •  with Quick Clamping Column: Brace or prop-up against the centre of the column base or clamping head.
• Core can be removed from the core-bit by tapping or pressing it out from behind. Never hit the core-bit itself with a hammer, as this can damage it.
• Remove blind core (no through bore) by the aid of cold chisel or similar, levering it loose against groove wall.
• At overhead drilling always use water collecting equipment so to prevent water entering the machine. Do not attempt to protect the machine by covering as this inhibits motor cooling and would cause burn-out by overheating.
• Water collecting rings are available for all drill bit sizes. The ring is secured to the central screw or the centering tip of the stand base. Cut the rubber gasket about 3mm bigger than the core-bit diameter.
• Always remove broken off core-bit segment(s) from the cut groove before recommencing any further drilling.
• Core-Bit
  • Use only core-bits recommended by your local specialist supplier or manufacturer’s agent. Follow their advice for particular application. There is no such thing as one/or universal core-bit that can satisfactorily drill concrete, reinforced concrete, granite, marble and (asphalt/tarmac).
  • A high content of rebar or very hard ballast in concrete will cause quicker blunting of core-bit. Re-dress more often by cutting into piece of corundum grinding wheel to reexpose diamond particles.
  • There is proportionate relationship between hardness of diamonds impregnated segment material, cutting speed and abrasiveness of material being cut. Follow speed instructions of the drilling machine. The optimum cutting speed is between 2 and 5 m/s.
  • Should core-bit jam or there is no progress made when drilling, check to ensure that there is sufficient amount of diamonds present in the surface of segments. If this is not the case, replace the core-bit.
• Safety Switch
• Check RCD (Residual Current Device) daily, following enclosed instructions. Make sure to use it as for any submerged pump or similar where RCD or FI-Box are a must

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