Makita HP2050; HP2050F; HP2051; HP2051F - 2-Speed Hammer Drill Manual

SPECIFICATIONS

Model		HP2050/HP2050F		HP2051/HP2051F
Speed		High	Low	High	Low
Capacities	Concrete	20 mm	-----	20 mm	-----
	Steel	8 mm	13 mm	8 mm	13 mm
	Wood	25 mm	40 mm	25 mm	40 mm
No load speed (min-1)		0 - 2,900	0 - 1,200	0 - 2,900	0 - 1,200
Blows per minute		0 - 58,000	0 - 24,000	0 - 58,000	0 - 24,000
Overall length		362 mm		360 mm
Net weight		2.5 kg		2.5 kg
Safety class

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.
• Specifications may differ from country to country.
• Weight according to EPTA-Procedure 01/2003

Intended use
The tool is intended for impact drilling in brick, concrete and stone as well as for drilling without impact in wood, metal, ceramic and plastic.

Power supply
The tool should be connected only to a power supply of the same voltage as indicated on the nameplate, and can only be operated on single-phase AC supply. They are double-insulated and can, therefore, also be used from sockets without earth wire.

Noise
The typical A-weighted noise level determined according to EN60745:
Sound pressure level (L_pA): 97 dB (A)
Sound power level (L_WA): 108 dB (A)
Uncertainty (K): 3 dB (A)

Wear ear protection

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745:
Work mode: impact drilling into concrete
Vibration emission (a_{h, ID}): 13 m/s²
Uncertainty (K): 3 m/s²

Work mode: drilling into metal
Vibration emission (a_{h, D}): 2.5 m/s² or less
Uncertainty (K): 1.5 m/s²

• The declared vibration emission value has been measured in accordance with the standard test method and may be used for comparing one tool with another.
• The declared vibration emission value may also be used in a preliminary assessment of exposure.

• The vibration emission during actual use of the power tool can differ from the declared emission value depending on the ways in which the tool is used.
• Be sure to identify safety measures to protect the operator that are based on an estimation of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the times when the tool is switched off and when it is running idle in addition to the trigger time).

General Power Tool Safety Warnings

Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.

Save all warnings and instructions for future reference.

HAMMER DRILL SAFETY WARNINGS

• Wear ear protectors when impact drilling. Exposure to noise can cause hearing loss.
• Use auxiliary handle(s), if supplied with the tool. Loss of control can cause personal injury.
• Hold power tool by insulated gripping surfaces, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a "live" wire may make exposed metal parts of the power tool "live" and could give the operator an electric shock.
• Always be sure you have a firm footing. Be sure no one is below when using the tool in high locations.
• Hold the tool firmly with both hands.
• Keep hands away from rotating parts.
• Do not leave the tool running. Operate the tool only when hand-held.
• Do not touch the bit or the workpiece immediately after operation; they may be extremely hot and could burn your skin.
• Some material contains chemicals which may be toxic. Take caution to prevent dust inhalation and skin contact. Follow material supplier safety data.

SAVE THESE INSTRUCTIONS.

FUNCTIONAL DESCRIPTION

• Always be sure that the tool is switched off and unplugged before adjusting or checking function on the tool.

Switch action

Fig.1

1. Lock button
2. Speed control screw
3. Switch trigger
4. Higher
5. Lower

• Before plugging in the tool, always check to see that the switch trigger actuates properly and returns to the "OFF" position when released.

To start the tool, simply pull the switch trigger. Tool speed is increased by increasing pressure on the switch trigger. Release the switch trigger to stop. For continuous operation, pull the switch trigger and then push in the lock button.

To stop the tool from the locked position, pull the switch trigger fully, then release it.

A speed control screw is provided so that maximum tool speed can be limited (variable). Turn the speed control screw clockwise for higher speed, and counterclockwise for lower speed.

Lighting up the lamps

For Model HP2050F, HP2051F

Fig.2

1. Lamp

• Do not look in the light or see the source of light directly.

To turn on the lamp, pull the trigger. Release the trigger to turn it off.

NOTE:

• Use a dry cloth to wipe the dirt off the lens of lamp. Be careful not to scratch the lens of lamp, or it may lower the illumination.

Reversing switch action

Fig.3

1. Reversing switch lever

This tool has a reversing switch to change the direction of rotation. Move the reversing switch lever to theposition (A side) for clockwise rotation or the position (B side) for counterclockwise rotation.

• Always check the direction of rotation before operation.
• Use the reversing switch only after the tool comes to a complete stop. Changing the direction of rotation before the tool stops may damage the tool.

Speed change

Fig.4

1. Arrow
2. Speed change knob

Two speed ranges can be preselected with the speed change knob.

To change the speed, turn the speed change knob so that the arrow on the tool body points toward the "I" position on the knob for low speed or "II" position for high speed. If it is hard to turn the knob, first turn the chuck slightly in either direction and then turn the knob again.

• Use the speed change knob only after the tool comes to a complete stop. Changing the tool speed before the tool stops may damage the tool.
• Always set the speed change knob to the correct position. If you operate the tool with the speed change knob positioned halfway between the "I" and "II" position, the tool may be damaged.

Selecting the action mode

Fig.5

1. Action mode changing lever

This tool has an action mode change lever. For rotation with hammering, slide the action mode change lever to the right ( symbol). For rotation only, slide the action mode change lever to the left ( symbol).

• Always slide the action mode change lever all the way to your desired mode position. If you operate the tool with the lever positioned halfway between the mode symbols, the tool may be damaged.

ASSEMBLY

• Always be sure that the tool is switched off and unplugged before carrying out any work on the tool.

Installing side grip (auxiliary handle)

Fig.6

1. Grip base
2. Side grip (auxiliary handle)
3. Teeth
4. Protrusions

Always use the side grip to ensure operating safety. Install the side grip so that the teeth on the grip fit in between the protrusions on the tool barrel. Then tighten the grip by turning clockwise at the desired position. It may be swung 360° so as to be secured at any position.

Installing or removing drill bit

For Model HP2050, HP2050F

Fig.7

1. Chuck key

To install the bit, place it in the chuck as far as it will go. Tighten the chuck by hand. Place the chuck key in each of the three holes and tighten clockwise. Be sure to tighten all three chuck holes evenly.

To remove the bit, turn the chuck key counterclockwise in just one hole, then loosen the chuck by hand.

After using the chuck key, be sure to return to the original position.

For Model HP2051, HP2051F

Fig.8

1. Sleeve
2. Ring

Hold the ring and turn the sleeve counterclockwise to open the chuck jaws. Place the bit in the chuck as far as it will go. Hold the ring firmly and turn the sleeve clockwise to tighten the chuck.

To remove the bit, hold the ring and turn the sleeve counterclockwise.

Depth gauge

Fig.9

1. Depth gauge

The depth gauge is convenient for drilling holes of uniform depth. Loosen the side grip and insert the depth gauge into the hole in the side grip. Adjust the depth gauge to the desired depth and tighten the side grip.

NOTE:

• The depth gauge cannot be used at the position where the depth gauge strikes against the tool body.

OPERATION

Hammer drilling operation

• There is a tremendous and sudden twisting force exerted on the tool/bit at the time of hole breakthrough, when the hole becomes clogged with chips and particles, or when striking reinforcing rods embedded in the concrete. Always use the side grip (auxiliary handle) and firmly hold the tool by both side grip and switch handle during operations. Failure to do so may result in the loss of control of the tool and potentially severe injury.

When drilling in concrete, granite, tile, etc., move the action mode changing lever to the position of symbol to use "rotation with hammering" action.

Be sure to use a tungsten-carbide tipped bit.

Position the bit at the desired location for the hole, then pull the switch trigger. Do not force the tool. Light pressure gives best results. Keep the tool in position and prevent it from slipping away from the hole. Do not apply more pressure when the hole becomes clogged with chips or particles. Instead, run the tool at an idle, then remove the bit partially from the hole. By repeating this several times, the hole will be cleaned out and normal drilling may be resumed.

Blow-out bulb (optional accessory)

Fig.10

1. Blow-out bulb

After drilling the hole, use the blow-out bulb to clean the dust out of the hole.

Drilling operation

• Pressing excessively on the tool will not speed up the drilling. In fact, this excessive pressure will only serve to damage the tip of your bit, decrease the tool performance and shorten the service life of the tool.
• There is a tremendous force exerted on the tool/bit at the time of hole break through. Hold the tool firmly and exert care when the bit begins to break through the workpiece.
• A stuck bit can be removed simply by setting the reversing switch to reverse rotation in order to back out. However, the tool may back out abruptly if you do not hold it firmly.
• Always secure small workpieces in a vise or similar hold-down device.

When drilling in wood, metal or plastic materials, turn the action mode changing lever to the position of symbol to use "rotation only" action.

Drilling in wood
When drilling in wood, the best results are obtained with wood drills equipped with a guide screw. The guide screw makes drilling easier by pulling the bit into the workpiece.

Drilling in metal
To prevent the bit from slipping when starting a hole, make an indentation with a center-punch and hammer at the point to be drilled. Place the point of the bit in the indentation and start drilling.

Use a cutting lubricant when drilling metals. The exceptions are iron and brass which should be drilled dry.

MAINTENANCE

• Always be sure that the tool is switched off and unplugged before attempting to perform inspection or maintenance.
• Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

Cleaning vent holes

Fig.11

1. Vent holes

The tool and its air vents have to be kept clean. Regularly clean the tool's air vents or whenever the vents start to become obstructed.

To maintain product SAFETY and RELIABILITY, repairs, carbon brush inspection and replacement, any other maintenance or adjustment should be performed by Makita Authorized Service Centers, always using Makita replacement parts.

OPTIONAL ACCESSORIES

• These accessories or attachments are recommended for use with your Makita tool specified in this manual. The use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or attachment for its stated purpose.

If you need any assistance for more details regarding these accessories, ask your local Makita Service Center.

• Tungsten-carbide tipped hammer bit
• Phillips bits
• Slotted bits
• Hole saw
• Blow-out bulb
• Safety goggles
• Keyless drill chuck 13
• Chuck key
• Grip assembly
• Depth gauge
• Plastic carrying case

NOTE:

• Some items in the list may be included in the tool package as standard accessories. They may differ from country to country.