Makita TW160D Cordless Impact Wrench Instruction Manual

Introduction

This manual provides instructions for the safe and effective use of the Makita TW160D Cordless Impact Wrench.

Read all safety warnings and instructions before use.

[Image: A Makita Cordless Impact Wrench, model TW160D, shown with a battery attached.]

Specifications

Note: Specifications are subject to change without notice and may differ by country. Weight may vary depending on attachments and battery cartridge.

Applicable Battery Cartridge and Charger

• Battery Cartridge: BL1016 / BL1021B / BL1041B
• Charger: DC10SA / DC10SB / DC10WC / DC10WD / DC18RE

Note: Availability of battery cartridges and chargers may differ by region.

⚠️ WARNING: Only use the specified battery cartridges and chargers. Using others may cause injury or fire.

Symbols

• ? Read instruction manual.
• [Battery types: Ni-MH, Li-ion]
• ♻️ Only for EU countries: This symbol indicates that the product, its batteries, and accumulators must not be disposed of with household waste. Follow local regulations for separate collection and recycling of electrical and electronic equipment and batteries.

Intended Use

The tool is intended for fastening bolts and nuts.

Noise

Typical A-weighted noise level determined according to EN62841-2-2:

• Sound pressure level (LpA): 90 dB(A)
• Sound power level (LWA): 101 dB(A)
• Uncertainty (K): 3 dB(A)

Note: Declared noise emission values are for comparison and preliminary exposure assessment.

⚠️ WARNING: Wear ear protection. Actual noise emission may vary depending on usage and workpiece.

⚠️ WARNING: Implement safety measures based on estimated exposure during actual use.

Vibration

Vibration total value (tri-axial vector sum) determined according to EN62841-2-2:

• Work mode: impact tightening of fasteners of maximum capacity
• Vibration emission (a_h): 11.0 m/s²
• Uncertainty (K): 1.5 m/s²

Note: Declared vibration values are for comparison and preliminary exposure assessment.

⚠️ WARNING: Vibration emission during actual use may differ. Ensure appropriate safety measures are taken.

⚠️ WARNING: Implement safety measures based on estimated exposure during actual use.

EC Declaration of Conformity

For European countries only. The EC declaration of conformity is included as Annex A to this instruction manual.

Safety Warnings

General Power Tool Safety Warnings

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

Keep all warnings and instructions for future reference.

The term "power tool" refers to mains-operated or battery-operated tools.

Work Area Safety

• Keep work area clean and well lit.
• Do not operate in explosive atmospheres (flammable liquids, gases, dust). Power tools create sparks.
• Keep children and bystanders away.

Electrical Safety

• Match power tool plugs to outlets; do not modify plugs or use adapter plugs with earthed tools.
• Avoid contact with earthed/grounded surfaces (pipes, radiators, etc.).
• Do not expose to rain or wet conditions.
• Do not abuse the cord; keep it away from heat, oil, sharp edges, or moving parts. Damaged cords increase shock risk.
• Use outdoor-suitable extension cords for outdoor operation.
• Use an RCD-protected supply in damp locations.
• Users of pacemakers or similar medical devices should consult their doctor before use due to potential EMF.

Personal Safety

• Stay alert, use common sense, do not operate when tired or under the influence of drugs, alcohol, or medication.
• Use personal protective equipment (PPE): always wear eye protection. Use dust masks, non-skid shoes, or hearing protection as appropriate.
• Prevent unintentional starting: ensure the switch is OFF before connecting power/battery, picking up, or carrying the tool.
• Remove adjusting keys or wrenches before turning the tool on.
• Do not overreach; maintain proper footing and balance.
• Dress properly; do not wear loose clothing or jewelry. Keep hair and clothing away from moving parts.
• Ensure dust extraction facilities are connected and used if provided.
• Do not let familiarity replace strict adherence to safety rules. A careless action can cause severe injury.
• Always wear protective goggles complying with relevant standards (ANSI Z87.1 in USA, EN 166 in Europe, or AS/NZS 1336 in Australia/New Zealand). A face shield is legally required in Australia/New Zealand.

It is an employer's responsibility to enforce the use of appropriate safety protective equipment for tool operators and others in the working area.

Power Tool Use and Care

• Do not force the tool; use the correct tool for the application.
• Do not use if the switch does not operate correctly.
• Disconnect power/battery before adjustments, changing accessories, or storing.
• Store idle tools out of reach of children and untrained users.
• Maintain tools and accessories; check for damage or misalignment. Damaged tools must be repaired before use.
• Keep cutting tools sharp and clean for easier control.
• Use the tool, accessories, and bits according to instructions, considering working conditions.
• Keep handles and grasping surfaces dry, clean, and free from oil/grease for safe handling.
• Do not wear cloth work gloves that can get entangled in moving parts.

Battery Tool Use and Care

• Recharge only with the specified charger.
• Use power tools only with specifically designated battery packs.
• When not in use, keep battery packs away from metal objects (paper clips, coins, keys, nails, screws) to prevent shorting.
• Avoid contact with ejected battery liquid; flush with water if contact occurs. Seek medical help for eye contact.
• Do not use damaged or modified battery packs or tools.
• Do not expose battery packs or tools to fire or excessive temperatures (above 130°C), as this may cause explosion.
• Follow charging instructions and temperature ranges. Improper charging can damage the battery and increase fire risk.

Service

• Have power tools serviced by qualified personnel using identical replacement parts to maintain safety.
• Never service damaged battery packs; only manufacturer or authorized providers.
• Follow instructions for lubricating and changing accessories.

Cordless Impact Wrench Safety Warnings

• Hold the tool by insulated gripping surfaces when near hidden wiring. Fasteners contacting a "live" wire may energize exposed metal parts, causing electric shock.
• Wear ear protection.
• Check impact sockets carefully for wear, cracks, or damage before installation.
• Hold the tool firmly.
• Keep hands away from rotating parts.
• Do not touch the impact socket, bolt, nut, or workpiece immediately after operation, as they may be extremely hot.
• Ensure firm footing; be aware of people below when working at height.
• Check proper fastening torque with a torque wrench, as it may differ based on bolt size and type.
• Ensure no hidden electrical cables, water pipes, or gas pipes are present that could be damaged by the tool.

SAVE THESE INSTRUCTIONS.

⚠️ WARNING: Do not let familiarity replace strict adherence to safety rules. Misuse or failure to follow safety rules may cause serious personal injury.

Important Safety Instructions for Battery Cartridge

• Read all instructions and cautionary markings for charger, battery, and product.
• Do not disassemble or tamper with the battery cartridge; it may result in fire, excessive heat, or explosion.
• Stop operating immediately if operating time becomes excessively shorter, as this may indicate overheating, potential burns, or explosion.
• If electrolyte gets into eyes, rinse with clear water and seek medical attention immediately.
• Do not short the battery cartridge: avoid touching terminals with conductive material, do not store with metal objects, and do not expose to water or rain. A short circuit can cause overheating, burns, or breakdown.
• Do not store or use 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 severely damaged or worn out, as it can explode in a fire.
• Do not nail, cut, crush, throw, drop, or hit the battery cartridge against hard objects. Such actions may result in fire, excessive heat, or explosion.
• Do not use a damaged battery.
• Lithium-ion batteries are subject to Dangerous Goods Legislation requirements for transport. Observe special requirements for packaging and labeling, and consult an expert for hazardous material preparation.
• When disposing of the battery cartridge, remove it from the tool and dispose of it safely according to local regulations.
• Use batteries only with specified Makita products. Using them with non-compliant products may result in fire, excessive heat, explosion, or electrolyte leakage.
• If the tool is not used for a long period, remove the battery.
• Battery cartridges may become hot during and after use; handle with care to avoid burns.
• Do not touch the tool terminal immediately after use, as it may be hot enough to cause burns.
• Keep terminals, holes, and grooves of the battery cartridge free from chips, dust, or soil to prevent overheating, fire, or malfunction.
• Do not use the battery cartridge near high-voltage electrical power lines unless the tool specifically supports it.
• Keep the battery away from children.

CAUTION: Only use genuine Makita batteries. Non-genuine Makita batteries or altered batteries may cause bursting, fire, personal injury, and damage, and will void the Makita warranty.

Tips for Maintaining Maximum Battery Life

1. Charge the battery cartridge before it is completely discharged. Always stop tool operation and charge when tool power is noticeably reduced.
2. Never recharge a fully charged battery cartridge; overcharging shortens its service life.
3. Charge the battery cartridge at room temperature (10°C - 40°C / 50°F - 104°F). Let hot cartridges cool down before charging.
4. When not using the battery cartridge, remove it from the tool or charger.

Functional Description

⚠️ CAUTION: Ensure the tool is switched OFF and the battery cartridge is removed before performing any adjustments or checks.

Installing or Removing Battery Cartridge

⚠️ CAUTION: Always switch off the tool before installing or removing the battery cartridge. Hold both tool and cartridge firmly to prevent slipping and potential injury or damage.

[Diagram description: Fig.1 shows the battery cartridge (3) being installed or removed from the tool. It illustrates the red indicator (1) and the release button (2) on the cartridge.]

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

To install: Align the cartridge tongue with the groove in the housing and slide it in until it clicks. Ensure it is fully locked; the red indicator should not be visible.

⚠️ CAUTION: Always install the battery cartridge fully until the red indicator is not visible to prevent accidental detachment and injury.

⚠️ CAUTION: Do not force the battery cartridge; if it doesn't slide easily, it's not inserted correctly.

Battery Protection System

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

• Overloaded: The tool draws abnormally high current. Turn off, stop the overloaded application, then turn on again. If it doesn't start, the battery may be overheated; let it cool before turning on again.
• Low Battery Voltage: Remaining capacity is too low. The motor may run briefly then stop. Remove and recharge the battery.

Indicating the Remaining Battery Capacity

For battery cartridges with an indicator:

[Diagram description: Fig.2 shows a battery cartridge with indicator lamps (1) and a check button (2).]

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

Note: Indication may vary slightly depending on usage conditions and ambient temperature.

Switch Action

[Diagram description: Fig.3 shows the switch trigger (1) of the tool.]

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

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

Note: The tool automatically stops if the switch trigger is held for approximately 6 minutes.

Lighting Up the Front Lamp

[Diagram description: Fig.4 shows the front lamp (1) on the tool.]

⚠️ CAUTION: Do not look directly into the light or its source.

[Diagram description: Fig.5 shows the button (1) used for lamp control.]

To turn the lamp on: Pull the switch trigger. To turn off: Release the trigger. The lamp turns off approximately 10 seconds after trigger release.

To keep the lamp OFF: Pull and release the switch trigger, then press the button for one second within 10 seconds. To turn the lamp status ON again, repeat the process.

Note: To confirm lamp status, pull the trigger. If the lamp lights up, status is ON; if not, it's OFF.

Note: If the tool overheats, the light flashes for one minute, then the LED display turns off. Cool the tool before operating again.

Note: Use a dry cloth to wipe the lamp lens. Avoid scratching the lens, as it may reduce illumination.

Reversing Switch Action

[Diagram description: Fig.6 shows the reversing switch lever (1) with positions A and B.]

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

⚠️ CAUTION: Use the reversing switch only after the tool has completely stopped. Changing rotation direction before stopping may damage the tool.

⚠️ CAUTION: When not operating the tool, always set the reversing switch lever to the neutral position.

The reversing switch changes the direction of rotation. Depress the lever from side A for clockwise rotation or side B for counterclockwise rotation. When the lever is in the neutral position, the switch trigger cannot be pulled.

Changing the Impact Force

[Diagram description: Fig.7 illustrates the three steps for changing impact force: 1. Hard, 2. Soft, 3. Reverse rotation auto stop mode. It shows the sequence of changing modes by pressing the button (5), with indicator lights changing (4).]

The impact force can be changed in three steps: Hard, Soft, and Reverse rotation auto stop mode, allowing for suitable tightening for various tasks. Pressing the button cycles through these modes.

The Reverse rotation auto stop mode functions only when rotating counterclockwise. When a bolt/nut is sufficiently loosened, the tool stops impacting and rotating.

Impact force can be changed within approximately one minute after releasing the switch trigger.

Note: Reverse rotation auto stop mode is only available when rotating counterclockwise. When rotating clockwise in this mode, it functions as Hard impact mode.

Note: When all lamps on the switch panel go out, the tool is turned off to save battery power. The impact force grade can be checked by pulling the switch trigger to the point where the tool does not operate.

Note: The impact force grade cannot be changed while pulling the switch trigger.

Assembly

⚠️ CAUTION: Ensure the tool is switched OFF and the battery cartridge is removed before carrying out any work.

Selecting Correct Impact Socket

Always use the correct size impact socket for bolts and nuts. An incorrect size may result in inaccurate fastening torque or damage to the bolt or nut.

Installing or Removing Impact Socket

[Diagram description: Fig.8 shows an impact socket (1) being fitted onto the square drive (2) of the tool.]

To install: Push the impact socket onto the square drive until it locks into place.

To remove: Simply pull the impact socket off.

Installing Hook

[Diagram description: Fig.9 shows the hook installation, indicating a groove (1), the hook (2), and a screw (3).]

The hook is a convenient accessory for temporarily hanging the tool. It can be installed on either side of the tool.

To install: Insert the hook into a groove in the tool housing and secure it with a screw. To remove, loosen the screw.

⚠️ WARNING: Use hanging/mounting parts only for their intended purposes (e.g., hanging on a tool belt).

⚠️ WARNING: Do not overload the hook, as excessive force may cause damage and injury.

⚠️ CAUTION: When installing the hook, always secure it firmly with the screw to prevent it from coming off.

⚠️ CAUTION: Ensure the tool is securely hung before releasing your hold to prevent falling and injury.

Using Hole

[Diagram description: Fig.10 shows a hanging hole (1) at the bottom rear of the tool.]

Use the hanging hole at the bottom rear of the tool to hang it on a wall using a cord or similar strings.

⚠️ WARNING: Never use the hanging hole for unintended purposes, such as tethering the tool at a high location, as this may cause damage and result in injury.

Operation

⚠️ CAUTION: Always insert the battery cartridge fully until it locks in place. If the red indicator is visible, it is not fully locked, which may cause it to fall out and result in injury.

[Diagram description: Fig.11 shows the tool being held firmly with the impact socket placed over a bolt or nut.]

Hold the tool firmly and place the impact socket over the bolt or nut. Turn the tool on to fasten.

The proper fastening torque may vary depending on the bolt/nut kind, size, and workpiece material. The relationship between fastening torque and fastening time is illustrated in the figures below.

Proper Fastening Torque for High Tensile Bolt

[Graph description: A graph showing Fastening Torque (N·m / kgf·cm) on the Y-axis versus Fastening Time (seconds) on the X-axis. Curves are shown for bolt sizes M8, M10, and M12.]

Note: Hold the tool pointed straight at the bolt or nut.

Note: Excessive fastening torque may damage the bolt/nut or impact socket. Perform a test operation to determine the proper fastening time.

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

The fastening torque is affected by various factors:

1. Battery Discharge: As the battery discharges, voltage drops, reducing fastening torque.
2. Impact Socket: Using an incorrect size or worn impact socket reduces fastening torque.
3. Bolt Characteristics: Torque varies with bolt diameter, torque coefficient, class, and length.
4. Tool Handling and Workpiece: The manner of holding the tool and the material of the driving position affect torque.
5. Speed: Operating the tool at low speed reduces fastening torque.

Proper Fastening Torque for Standard Bolt

[Graph description: A graph showing Fastening Torque (N·m / kgf·cm) on the Y-axis versus Fastening Time (seconds) on the X-axis. Curves are shown for bolt sizes M8, M10, M12, M14, and M16.]

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 agents, as they may cause discoloration, deformation, or cracks.

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

Optional Accessories

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

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

• Impact socket
• Plastic carrying case
• Makita genuine battery and charger

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