makita BHP451 Cordless Percussion Driver Drill Instruction Manual

makita BHP451 Cordless Percussion Driver Drill

Explanation of general view

1. Red part
2. Button
3. Battery cartridge
4. Switch trigger
5. Lamp
6. Reversing switch lever
7. Speed change lever
8. Action mode changing ri ng
9. Adjusting ring
10. Arrow
11. Graduations
12. Steel band
13. Grip base
14. Protrusion
15. Side grip
16. Groove
17. Sleeve
18. Bit holder
19. Bit
20. Depth rod
21. Clamp screw
22. Screw
23. Hook
24. Blow-out bulb
25. Limit mark
26. Rear cover
27. Screws
28. Arm
29. Spring
30. Recessed part
31. Carbon brush cap
32. Hole
33. Carbon brush cap

SPECIFICATIONS

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.
• Note: Specifications may differ from country to country.

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.

SPECIFIC SAFETY RULES

DO NOT let comfort or familiarity with product (gained from repeated use) replace strict adherence to ham-mer drill safety rules. If you use this power tool unsafely or incorrectly, you can suffer serious per-sonal injury.

1. Wear ear protectors with impact drills. Exposure to noise can cause hearing loss.
2. Use auxiliary handles supplied with the tool. Loss of control can cause personal injury.
3. Hold power tools by insulated gripping surfaces when performing an operation where the cutting tool may contact hidden wiring or its own cord. Contact with a “live” wire will make exposed metal parts of the tool “live” and shock the operator.
4. Always be sure you have a firm footing. Be sure no one is below when using the tool in high loca-tions.
5. Hold the tool firmly with both hands.
6. Keep hands away from rotating parts.
7. Do not leave the tool running. Operate the tool only when hand-held.
8. Do not touch the bit or the workpiece immediately after the operation; they may be extremely hot and could burn your skin.
9. Some materials contain chemicals that may be toxic. Take caution to prevent dust inhalation and skin contact. Follow material supplier safety data.

SAVE THESE INSTRUCTIONS

WARNING
MISUSE or failure to follow the safety rules stated in this instruction manual may cause serious personal injury.

IMPORTANT SAFETY INSTRUCTIONS FOR BATTERY CARTRIDGE

1. Before using the battery cartridge, read all instruc-tions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.
2. Do not disassemble the battery cartridge.
3. If operating time has become excessively shorter, stop operating immediately. It may result in a risk of overheating, possible burns and even an explosion.
4. If electrolyte gets into your eyes, rinse them out with clear water and seek medical attention right away. It may result in loss of your eyesight.
5. Do not short the battery cartridge:
6. Do not touch the terminals with any conductive material.
7. Avoid storing battery cartridges in a container with other metal objects such as nails, coins, etc.
8. Do not expose the battery cartridge to water or rain. A battery short can cause a large current flow, overheating, possible burns and even a breakdown.
9. Do not store the tool and battery cartridge in locations where the temperature may reach or exceed 50°C (122°F).
10. Do not incinerate the battery cartridge even if it is severely damaged or is completely worn out. The battery cartridge can explode in a fire.
11. Be careful not to drop or strike the battery.

SAVE THESE INSTRUCTIONS

Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely discharged. Always stop tool operation and charge the battery cartridge when you notice less tool power.
2. Never recharge a fully charged battery cartridge. Overcharging shortens the battery service life.
3. Charge the battery cartridge at room temperature at 10°C – 40°C (50°F – 104°F). Let a hot battery cartridge cool down before charging it.

FUNCTIONAL DESCRIPTION

CAUTION

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

Installing or removing the battery cartridge (Fig. 1)

• Always switch off the tool before insertion or removal of the battery cartridge.
• To remove the battery cartridge, withdraw it from the tool while sliding the button on the side of the cartridge.
• To insert the battery cartridge, align the tongue on the battery cartridge with the groove in the housing and slip it into place. Always insert it until it locks in place with a little click. If you can see the red part on the upper side of the button, it is not locked completely. Insert it fully until the red part cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you.
• Do not use force when inserting the battery cartridge. If the cartridge does not slide in easily, it is not being inserted correctly.

Switch action (Fig. 2)

CAUTION
• Before inserting the battery cartridge into 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.

Lighting up the front lamp (Fig. 3)

CAUTION

• Do not look in the light or see the source of light directly. Pull the switch trigger to light up the lamp. The lamp keeps on lighting while the switch trigger is being pulled. The lamp goes out 10 -15 seconds after releasing the trigger.

NOTE

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

Reversing switch action (Fig. 4)

This tool has a reversing switch to change the direction of rotation. Depress the reversing switch lever from the “A” side for clockwise rotation or from the “B” side for counterclockwise rotation. When the reversing switch lever is in the neutral position, the switch trigger cannot be pulled.

CAUTION

• 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.
• When not operating the tool, always set the reversing switch lever to the neutral position.

Speed change (Fig. 5)

This tool has a three-gear speed change lever. To change the speed, first switch off the tool and then slide the speed change lever to the “1” position for low speed, “2” position for medium speed or “3” position for high speed. Be sure that the speed change lever is set to the correct position before operation. Use the right speed for your job.

NOTE

• When changing the position from “1” to “3” or from “3” to “1”, it may be a little difficult to slide the speed change lever. At this time, switch on and run the tool for a second at the “2” position, then stop the tool and slide to your desired position.

CAUTION

• Always set the speed change lever fully to the correct position. If you operate the tool with the speed change lever positioned halfway between the “1” position, “2” position and “3” position, the tool may be damaged.
• Do not use the speed change lever while the tool is running. The tool may be damaged.

Selecting the action mode (Fig. 6)

This tool employs an action mode change lever. Select one of the three modes suitable for your work needs by using this lever.
For rotation only, slide the lever so that it points toward the mark on the tool body. For rotation with hammering, slide the lever so that it points toward the mark on the tool body. For rotation with the clutch, slide the lever so that it points toward the mark on the tool body.

NOTE

• When changing the position from “ ” to “ ”, it may be a little difficult to slide the mode change lever. At this time, switch on and run the tool for a second at the “ ” position, then stop the tool and slide to your desired position.

CAUTION

• Always set the lever correctly to your desired mode mark. If you operate the tool with the lever positioned halfway between the mode marks, the tool may be damaged.

Adjusting the fastening torque (Fig. 7)

The fastening torque can be adjusted in 16 steps by turning the adjusting ring so that its graduations are aligned with the arrow on the tool body. The fastening torque is minimum when the number 1 is aligned with the arrow, and maximum when the number 16 is aligned with the arrow. Before actual operation, drive a trial screw into your material or a piece of duplicate material to determine which torque level is required for a particular application.

ASSEMBLY

CAUTION

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

Installing side grip (auxiliary handle) (Fig. 8)

Always use the side grip to ensure operating safety. Insert the side grip so that the protrusions on the grip base fit in between the grooves on the tool barrel. Then tighten the grip by turning clockwise.

Installing or removing the driver bit or drill bit (Fig. 9)

Turn the sleeve counterclockwise to open the chuck jaws. Place the bit in the chuck as far as it will go. Turn the sleeve clockwise to tighten the chuck. To remove the bit, turn the sleeve counterclockwise.

Installing bit holder (Fig. 10)
Fit the bit holder into the protrusion at the tool foot on either the right or left side and secure it with a screw. When not using the driver bit, keep it in the bit holders. Bits 45 mm long can be kept there.

Adjustable depth rod (Fig. 11)
The adjustable depth rod is used to drill holes of uniform depth. Loosen the clamp screw, set to desired position, then tighten the clamp screw.

Hook (Fig. 12)
The hook is convenient for temporarily hanging the tool. This can be installed on either side of the tool. To install the hook, insert it into a groove in the tool housing on either side and then secure it with a screw. To remove, loosen the screw and then take it out.

OPERATION

Hammer drilling operation

CAUTION

• 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. First, slide the action mode change lever so that it points to the marking. The adjusting ring can be aligned in any torque level for this operation.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. 13)
After drilling the hole, use the blow-out bulb to clean the dust out of the hole.

Screwdriving operation (Fig. 14)
First, slide the action mode change lever so that it points to the marking. Adjust the adjusting ring to the proper torque level for your work. Then proceed as follows. Place the point of the driver bit in the screw head and apply pressure to the tool. Start the tool slowly and then increase the speed gradually. Release the switch trigger as soon as the clutch cuts in.

NOTE

• Make sure that the driver bit is inserted straight in the screw head, or the screw and/or bit may be damaged.
• When driving wood screws, predrill pilot holes to make driving easier and to prevent splitting of the workpiece. See the chart.
• If the tool is operated continuously until the battery cartridge has discharged, allow the tool to rest for 15 minutes before proceeding with a fresh battery. Drilling operation

CAUTION

• Pressing excessively on the tool will not speed up the drilling. This excessive pressure will only serve to damage the tip of your bit, decrease the tool’s performance and shorten the service life of the tool.
• There is a tremendous force exerted on the tool/bit at the time of hole breakthrough. 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 to back out. However, the tool may back out abruptly if you do not hold it firmly.
• Always secure small workpieces in a vice or similar hold-down device.
• If the tool is operated continuously until the battery cartridge has discharged, allow the tool to rest for 15 minutes before proceeding with a fresh battery.

First, slide the action mode change lever so that it points to the marking.

The adjusting ring can be aligned in any torque level for this operation. Then proceed as follows.

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 centre 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

CAUTION

• Always be sure that the tool is switched off and the battery cartridge is removed before attempting to perform inspection or maintenance.

Replacing carbon brushes
Replace when they wear down to the limit mark. Keep the carbon brushes clean and free to slip in the holders. Both carbon brushes should be replaced at the same time. Use only identical carbon brushes. (Fig. 15) Use a screwdriver to remove two screws then remove the rear cover. (Fig. 16 ) Raise the arm part of the spring and then place it in the recessed part of the housing with a slotted bit screwdriver of slender shaft or the like. (Fig. 17) Use pliers to remove the carbon brush caps of the carbon brushes. Take out the worn carbon brushes, insert the new ones and replace the carbon brush caps in reverse. (Fig. 18) Make sure that the carbon brush caps have fit into the holes in brush holders securely. (Fig. 19) Reinstall the rear cover and tighten two screws securely. To maintain product SAFETY and RELIABILITY, repairs, and any other maintenance or adjustment should be performed by Makita Authorized Service Centers, always using Makita replacement parts.

ACCESSORIES

CAUTION

• 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 with more details regarding these accessories, ask your local Makita service centre.

• Drill bits
• Hammer drill bits
• Screw bits
• Blow-out bulb
• Safety goggles
• Various types of Makita genuine batteries and chargers
• Grip assembly
• Depth rod
• Hook
• Rubber pad assembly
• Wool bonnet
• Foam polishing pad

For Model BHP441 For European countries only Noise

The typical A-weighted noise level determined according to EN60745-2-1: Sound pressure level (LpA): 85 dB (A) Uncertainty (K): 3 dB (A) The noise level under working may exceed 85 dB (A). Wear ear protection.

Vibration

The vibration total value (tri-axial vector sum) determined
according to EN60745-2-1:

• Work mode: impact drilling into concrete
• Vibration emission (ah, ID): 10.5 m/s2
• Uncertainty (K): 1.5 m/s2
• Work mode: drilling into metal
• Vibration emission (ah,D) : 2.5 m/s2 or less

For Model BHP451 For European countries only Noise

The typical A-weighted noise level determined according to EN60745-2-1:

• Sound pressure level (LpA): 86 dB (A)
• Sound power level (LWA): 97 dB (A)
• Uncertainty (K): 3 dB (A)

Wear ear protection

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-1:

• Work mode: impact drilling into concrete
• Vibration emission (ah, ID): 10.0 m/s2 Uncertainty (K): 2.5 m/s2
• Work mode: drilling into metal
• Vibration emission (ah, D): 2.5 m/s2 or less

EC-DECLARATION OF CONFORMITY

We declare under our sole responsibility that this product complies with the following standards of standardized documents; EN60745, and EN55014 under Council Direc-tives, 89/336/EEC, 98/37/EC.

CE 2007

• Tomoyasu Kato Director

Responsible Manufacturer:
Makita Corporation 3-11-8, Sumiyoshi-cho, Anjo, Aichi, JAPAN

Authorized Representative in Europe:
Makita International Europe Ltd. Michigan Drive, Tongwell, Milton Keynes, Bucks MK15 8JD, ENGLAND

References

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