Makita HP331D Cordless Hammer Driver Drill

Specifications

Specifications and battery cartridge may differ by country. Weight is with battery cartridge, according to EPTA-Procedure 01/2003.

Symbols

The following symbols are used on the equipment. Please understand their meaning before use:

• ? Read instruction manual.
• ♻️ Only for EU countries: Do not dispose of electric equipment or battery pack with household waste. Follow European Directives for separate collection and recycling of electrical equipment and batteries.
• Battery types: Cd, Ni-MH, Li-ion.

Intended Use

The tool is intended for impact drilling in brick, concrete, and stone. It is also suitable for screw driving and drilling without impact in wood, metal, ceramic, and plastic.

Noise

Typical A-weighted noise level (according to EN60745):

• Sound pressure level (LpA): 81 dB(A)
• Sound power level (LWA): 92 dB(A)
• Uncertainty (K): 3 dB(A)

⚠️ WARNING: Wear ear protection.

Vibration

Vibration total value (tri-axial vector sum) determined according to EN60745:

• Work mode: impact drilling into concrete
  Vibration emission (ah,ID): 8.0 m/s²
  Uncertainty (K): 1.5 m/s²
• Work mode: drilling into metal
  Vibration emission (an,p): 2.5 m/s²
  Uncertainty (K): 1.5 m/s²

NOTE: The declared vibration emission value is measured using a standard test method and can be used for comparing tools. It may also be used for preliminary exposure assessment.

⚠️ WARNING: Vibration emission during actual use may differ from the declared value based on how the tool is used. Identify safety measures based on estimated exposure in actual conditions.

EC Declaration of Conformity

For European countries only: Makita declares that the Machine: Cordless Hammer Driver Drill, Model No./Type: HP331D conforms to European Directives 2006/42/EC. Manufactured in accordance with standard EN60745. Technical file available from Makita, Jan-Baptist Vinkstraat 2, 3070, Belgium.

General Power Tool Safety Warnings

⚠️ WARNING: Read all safety warnings and instructions. Failure to follow these may result in electric shock, fire, or serious injury. Save these instructions.

Work Area Safety

1. Keep work area clean and well lit.
2. Do not operate in explosive atmospheres (flammable liquids, gases, dust). Sparks can ignite dust or fumes.
3. Keep children and bystanders away. Distractions can cause loss of control.

Electrical Safety

1. Ensure power tool plugs match outlets. Do not modify plugs or use adapter plugs with earthed tools.
2. Avoid contact with earthed surfaces (pipes, radiators, refrigerators).
3. Do not expose power tools to rain or wet conditions.
4. Do not abuse the cord. Keep it away from heat, oil, sharp edges, or moving parts.
5. Use outdoor extension cords suitable for outdoor use.
6. In damp locations, use a residual current device (RCD) protected supply.

Personal Safety

1. Stay alert, watch what you are doing, and use common sense. Do not use while tired or under the influence of drugs, alcohol, or medication.
2. Use personal protective equipment: always wear eye protection. Use dust masks, safety shoes, hard hats, or hearing protection as appropriate.
3. Prevent unintentional starting: ensure the switch is OFF before connecting to power or battery, or when carrying the tool.
4. Remove any adjusting key or wrench before turning the tool on.
5. Do not overreach; maintain proper footing and balance.
6. Dress properly: avoid loose clothing, jewelry, and keep hair, clothing, and gloves away from moving parts.
7. If dust extraction facilities are provided, ensure they are connected and used properly.

Power Tool Use and Care

1. Use the correct power tool for your application.
2. Do not use the tool if the switch does not turn it on and off.
3. Disconnect the plug or battery before making adjustments, changing accessories, or storing the tool.
4. Store idle tools out of reach of children and untrained users.
5. Maintain power tools: check for misalignment, binding, or broken parts. Have damaged tools repaired before use.
6. Keep cutting tools sharp and clean.
7. Use the tool, accessories, and bits according to instructions, considering working conditions.

Battery Tool Use and Care

1. Recharge only with the specified charger.
2. Use only with specifically designated battery packs.
3. Keep battery packs away from metal objects (paper clips, coins, keys, nails) when not in use to prevent short circuits.
4. Avoid contact with ejected battery liquid; flush with water if contact occurs, seek medical help for eye contact.

Service

1. Have your power tool serviced by a qualified repair person using only identical replacement parts.
2. Follow instructions for lubricating and changing accessories.
3. Keep handles dry, clean, and free from oil and grease.

Cordless Hammer Driver Drill Safety Warnings

1. Wear ear protectors when impact drilling.
2. Use auxiliary handle(s) if supplied.
3. Hold the tool by insulated gripping surfaces when the accessory may contact hidden wiring.
4. Always ensure firm footing, especially when working at heights.
5. Hold the tool firmly.
6. Keep hands away from rotating parts.
7. Do not leave the tool running unattended; operate only when hand-held.
8. Do not touch the bit or workpiece immediately after operation; they may be extremely hot.
9. Be cautious of materials containing toxic chemicals; prevent dust inhalation and skin contact.

Important Safety Instructions for Battery Cartridge

SAVE THESE INSTRUCTIONS.

⚠️ WARNING: Do not let familiarity with the product replace strict adherence to safety rules. Misuse can cause serious personal injury.

1. Read all instructions and cautionary markings on the charger, battery, and product before use.
2. Do not disassemble the battery cartridge.
3. If operating time becomes excessively shorter, stop operating immediately to prevent overheating, burns, or explosion.
4. If electrolyte gets into eyes, rinse with clear water and seek medical attention immediately.
5. Do not short the battery cartridge: avoid conductive material contact with terminals and do not store with other metal objects. Do not expose to water or rain. A short circuit can cause large current flow, overheating, burns, or breakdown.
6. Do not store the tool and battery cartridge where temperatures may reach or exceed 50 °C (122 °F).
7. Do not incinerate the battery cartridge, even if severely damaged; it can explode in a fire.
8. Be careful not to drop or strike the battery.
9. Do not use a damaged battery.
10. Follow local regulations for battery disposal.

Tips for Maintaining Maximum Battery Life

1. Charge the battery cartridge before it is completely discharged. Stop operation and charge when tool power decreases.
2. Never recharge a fully charged battery cartridge; overcharging shortens service life.
3. Charge the battery cartridge at room temperature (10 °C - 40 °C / 50 °F - 104 °F). Let a hot battery cartridge cool down before charging.

Functional Description

? CAUTION: Ensure the tool is switched OFF and the battery cartridge is removed before adjusting or checking functions.

Installing or Removing Battery Cartridge

? CAUTION: Always switch off the tool before installing or removing the battery cartridge. Hold the tool and battery cartridge firmly to prevent them from slipping and causing damage or injury.

To remove: Slide the battery cartridge from the tool while pressing the button on the front of the cartridge.

To install: Align the tongue on the battery cartridge with the groove in the tool housing and slide it in until it clicks. Ensure the red indicator on the button is not visible, meaning it is fully locked.

? CAUTION: Always install the battery cartridge fully until the red indicator cannot be seen. Failure to do so may cause it to fall out, leading to injury.

? CAUTION: Do not install the battery cartridge forcibly. If it doesn't slide in easily, it's not being inserted correctly.

Battery Protection System

The tool has a battery protection system that automatically cuts off motor power to extend battery life. The tool stops if:

• Overloaded: The tool is operated in a manner that draws abnormally high current. In this case, release the switch trigger, stop the application, and pull the trigger again to restart. If the tool does not start, the battery is overheated; let it cool before restarting.
• Low Battery Voltage: The remaining battery capacity is too low. The motor may run briefly and then stop. Remove and recharge the battery.

Indicating the Remaining Battery Capacity

(For battery cartridges with "B" at the end of the model number)

Press the check button on the battery cartridge to display the remaining capacity via indicator lamps.

• Indicator Lamps:
• Lighted: 75% to 100%
• Lighted, Lighted: 50% to 75%
• Lighted, Lighted, Lighted: 25% to 50%
• Lighted, Lighted, Lighted, Lighted: 0% to 25%
• Off: No lights indicate 0% to 25% capacity.

NOTE: Indication may differ slightly from actual capacity depending on usage conditions and ambient temperature.

Switch Action

1. Switch trigger

? CAUTION: Before inserting the battery cartridge, check that the switch trigger actuates properly and returns to the "OFF" position when released.

To start: Pull the switch trigger. Tool speed increases with trigger pressure. Release the trigger to stop.

Reversing Switch Action

1. Reversing switch lever

? CAUTION: Always check the direction of rotation before operation.

? CAUTION: Use the reversing switch only after the tool comes to a complete stop. Changing direction before stopping may damage the tool.

? CAUTION: When not operating, set the reversing switch lever to the neutral position.

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

Lighting Up the Front Lamp

1. Lamp

? CAUTION: Do not look directly into the light source.

Pull the switch trigger to light the lamp. The lamp stays on while the trigger is pulled and turns off approximately 10 seconds after release.

NOTE: Use a dry cloth to wipe the lamp lens. Be careful not to scratch the lens, as this may reduce illumination.

Speed Change

1. Speed change lever

? CAUTION: Always set the speed change lever fully to the correct position. Operating with the lever halfway between "1" and "2" may damage the tool.

? CAUTION: Do not use the speed change lever while the tool is running; it may be damaged.

To change speed, switch off the tool first. Select "2" for high speed or "1" for low speed but high torque. Ensure the lever is in the correct position before operation. If tool speed decreases significantly with "2", slide the lever to "1" and restart.

Selecting the Action Mode

? CAUTION: Always set the ring correctly to your desired mode mark. Operating with the ring positioned halfway between modes may damage the tool.

? CAUTION: Changing the position from one mode to another may be difficult. If so, switch on and run the tool briefly at the "Drilling" position, then stop and slide the ring to your desired position.

This tool has three action modes:

• Drilling mode (rotation only)
• Hammer drilling mode (rotation with hammering)
• Screwdriving mode (rotation with clutch)

Select the mode suitable for your work by turning the action mode changing ring and aligning the mark with the arrow on the tool body.

Diagram: Shows the action mode changing ring (1), adjusting ring (2), graduations (3), and arrow (4).

Adjusting the Fastening Torque

The fastening torque can be adjusted in 18 steps by turning the adjusting ring. Align the graduations with the arrow on the tool body. Torque increases from 1 (minimum) to 18 (maximum).

Before operation, drive a trial screw into your material or a duplicate piece to determine the required torque level. The table below shows a guide for screw size and graduation:

Diagram: Shows the action mode changing ring (1), adjusting ring (2), graduations (3), and arrow (4).

Assembly

? CAUTION: Ensure the tool is switched OFF and the battery cartridge is removed before performing any work on the tool.

Installing or Removing Driver Bit/Drill Bit

Optional accessory

Diagram: Shows the chuck jaws opening and closing. Labels: 1. Sleeve, 2. Close, 3. Open.

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

Installing Driver Bit Holder

Optional accessory

Diagram: Shows the driver bit holder being fitted to the tool's foot. Labels: 1. Driver bit holder, 2. Driver bit.

Fit the driver bit holder into the protrusion at the tool's foot on either the right or left side and secure it with a screw. When not using the driver bit, keep it in the driver bit holders. Driver bits up to 45 mm long can be kept there.

Installing Hook

Diagram: Shows the hook being attached to the tool's housing. Labels: 1. Groove, 2. Hook, 3. Screw.

The hook is convenient for temporarily hanging the tool. It can be installed on either side of the tool. Insert the hook into a groove in the tool housing and secure it with a screw. To remove, loosen the screw.

Operation

? CAUTION: Always insert the battery cartridge fully until it locks in place. If the red part of the button is visible, it is not locked completely. Insert until the red part cannot be seen. Failure to do so may cause the cartridge to fall out, causing injury.

? CAUTION: When the speed decreases significantly, reduce the load or stop the tool to avoid damage.

Hold the tool firmly with one hand on the grip and the other hand on the bottom of the battery cartridge to control the twisting action.

Screwdriving Operation

? CAUTION: Adjust the adjusting ring to the proper torque level for your work.

? CAUTION: Ensure the driver bit is inserted straight in the screw head to prevent damage to the screw or bit.

First, turn the action mode changing ring so the arrow points to the screwdriving marking. Place the driver bit point into the screw head and apply pressure. Start the tool slowly, increasing speed gradually. Release the switch trigger as soon as the clutch engages.

NOTE: For wood screws, pre-drill a pilot hole 2/3 the diameter of the screw for easier driving and to prevent splitting.

Hammer Drilling Operation

? CAUTION: A tremendous and sudden twisting force is exerted on the tool/drill bit during hole breakthrough, when the hole is clogged with chips/particles, or when hitting reinforcing rods.

First, turn the action mode changing ring so the arrow points to the hammer drilling marking. The adjusting ring can be set to any torque level for this operation. Use a tungsten-carbide tipped drill bit. Position the drill bit at the desired location, then pull the switch trigger. Do not force the tool; light pressure yields best results. Keep the tool steady to prevent slipping. If the hole becomes clogged, do not apply more pressure; run the tool at idle, then partially withdraw the drill bit. Repeat this process to clear the hole and resume drilling.

Drilling in Metal

To prevent drill bit slipping when starting a hole, make an indentation with a center-punch and hammer. Place the drill bit point in the indentation and start drilling. Use a cutting lubricant for metals, except for iron and brass, which should be drilled dry.

? CAUTION: Excessive pressure will not speed up drilling and can damage the drill bit, decrease performance, and shorten tool life.

? CAUTION: Hold the tool firmly and be careful when the drill bit breaks through the workpiece due to the significant force exerted.

? CAUTION: A stuck drill bit can be removed by setting the reversing switch to reverse rotation to back out. Hold the tool firmly, as it may back out abruptly.

? CAUTION: Always secure small workpieces in a vise or similar hold-down device.

? CAUTION: If the tool is operated until the battery is discharged, allow it to rest for 15 minutes before using a fresh battery.

Using the Tool as a Hand Screwdriver

Switch off the tool. Move the reversing switch lever to the neutral position. Turn the action mode changing ring so the arrow points to the screwdriving marking. Turn the tool.

NOTE: This is convenient for checking screwdriving.

NOTE: Do not use for work requiring excessive force, such as tightening bolts or removing rusted screws.

Blow-out Bulb

Optional accessory

Diagram: Shows the blow-out bulb being used to clear dust from a drilled hole.

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

Using Holster

Optional accessory

? CAUTION: When using the holster, remove any driver bit/drill bit from the tool.

? CAUTION: Turn off the tool and wait for it to stop completely before placing it in the holster. Secure the holster with its button to hold the tool firmly.

1. Thread a waist belt or similar through the holster holder.
2. Place the tool in the holster and lock it with the holster button.

Diagram: Shows a waist belt threaded through the holster holder.

Diagram: Shows the tool being placed and secured in the holster.

You can keep two driver bits at the front of the holster.

Maintenance

? CAUTION: Ensure the tool is switched OFF and the battery cartridge is removed before performing inspection or maintenance.

NOTICE: Never use gasoline, benzine, thinner, alcohol, or similar solvents, as they may cause discoloration, deformation, or cracks.

To maintain product SAFETY and RELIABILITY, all repairs, maintenance, and adjustments should be performed by Makita Authorized or Factory Service Centers, using only Makita replacement parts.

Optional Accessories

? CAUTION: These accessories or attachments are recommended for use with your Makita tool. Using other accessories or attachments may present a risk of injury. Use accessories only for their stated purpose.

For assistance with accessories, contact your local Makita Service Center.

• Drill bits
• Driver bits
• Socket bits
• Tungsten-carbide tipped drill bit
• Blow-out bulb
• Driver bit holder
• Hook
• Holster
• Makita genuine battery and charger

NOTE: Some items may be included as standard accessories and may differ by country.