MAKITA BHP451 (02) PDF MANUAL

MAKITA BHP451 (02) PDF SUMMARY:

What is this tool intended for?

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.

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What are the safety rules to follow when using this tool?

• Wear ear protectors with impact drills. Exposure to noise can cause hearing loss.
• Use auxiliary handles supplied with the tool. Loss of control can cause personal injury.
• 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.
• 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 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.

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What are the important safety instructions for the battery cartridge?

• Before using the battery cartridge, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using the battery.

• Do not disassemble the battery cartridge.

• If operating time has become excessively shorter, stop operating immediately. It may result in a risk of overheating, possible burns, and even an explosion.

• If electrolyte gets into your eyes, rinse them out with clear water and seek medical attention right away. It may result in loss of eyesight.

• Do not short the battery cartridge:

  • Do not touch the terminals with any conductive material.
  • Avoid storing the battery cartridge in a container with other metal objects such as nails, coins, etc.
  • Do not expose the battery cartridge to water or rain.

• Do not store the tool and battery cartridge in locations where the temperature may reach or exceed 50°C (122°F).

• 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.

• Be careful not to drop or strike the battery.

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What are some tips for maintaining maximum battery life?

• Charge the battery cartridge before it is completely discharged. Always stop tool operation and charge the battery cartridge when you notice less tool power.
• Never recharge a fully charged battery cartridge. Overcharging shortens the battery service life.
• 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.

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How do I install or remove the battery cartridge?

• 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 all the way 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.

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How does the switch action work?

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.

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How does the front lamp work?

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. 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.

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How does the reversing switch action work?

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 counter-clockwise rotation. When the reversing switch lever is in the neutral position, the switch trigger cannot be pulled. 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.

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How do I change the speed?

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. 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. 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.

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How do I select the action mode?

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 clutch, slide the lever so that it points toward the mark on the tool body.

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. 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.

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How do I adjust the fastening torque?

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. Use a screw on an actual material or a piece of duplicate material to determine which torque level is required for a particular application.

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How do I install the side grip (auxiliary handle)?

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.

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How do I install or remove a driver bit or drill bit?

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.

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How do I install the bit holder?

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.

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How do I use the adjustable depth rod?

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

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How do I install the hook?

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.

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How do I perform hammer drilling operation?

Slide the action mode change lever so that it points to the marking. The adjusting ring can be aligned in any torque levels for this operation. There is a tremendous and sudden twisting force exerted on the tool/bit at the time of hole break-through, 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 the 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. Place the point of the bit at the desired location for the hole, then pull the switch trigger. Do not force the tool. Light pressure gives the 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. After drilling the hole, use the blow-out bulb to clean the dust out of the hole.

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How do I perform screwdriving operation?

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. 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. 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.

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How do I perform drilling operation?

Slide the action mode change lever so that it points to the marking. The adjusting ring can be aligned in any torque levels for this 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. If the bit becomes bound in the workpiece, stop the tool immediately by releasing the switch trigger. Then use 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. 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.

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How do I drill 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.

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How do I drill 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.

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How do I replace the 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. Use a screwdriver to remove two screws then remove the rear cover. 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. 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. Make sure that the carbon brush caps have fit into the holes in brush holders securely. Reinstall the rear cover and tighten two screws securely. To maintain product SAFETY and RELIABILITY, repairs, any other maintenance, or adjustment should be performed by Makita Authorized Service Centers, always using Makita replacement parts.

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What are the recommended accessories and attachments?

• 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

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What are the noise and vibration levels for Model BHP441 (for European countries only)?

• Noise:
  • 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:
  • 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

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What are the noise levels for Model BHP451 (for European countries only)?

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

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What are the vibration levels for Model BHP451 (for European countries only)?

• Vibration:
  • 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

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What standards does this product comply with?

This product is in compliance with the following standards of standardized documents; EN60745, EN55014 in accordance with Council Directives, 89/336/EEC, 98/37/EC.

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What size pilot hole should I use for wood screws?

The following table shows the recommended pilot hole sizes for different nominal diameters of wood screws:

Nominal diameter of wood screw (mm)	Recommended size of pilot hole (mm)
3.1	2.0 – 2.2
3.5	2.2 – 2.5
3.8	2.5 – 2.8
4.5	2.9 – 3.2
4.8	3.1 – 3.4
5.1	3.3 – 3.6
5.5	3.7 – 3.9
5.8	4.0 – 4.2
6.1	4.2 – 4.4