WORX WU387 WU387.X Lithium-Ion Brushless Rotary Hammer

Product Overview

This document provides comprehensive instructions for the WORX WU387 and WU387.X Lithium-Ion Brushless Rotary Hammer. It covers safety precautions, intended use, operation, maintenance, and troubleshooting.

Product Identification:

• Model Numbers: WU387, WU387.X
• Brand: WORX
• Type: Lithium-Ion Brushless Rotary Hammer

General Power Tool Safety Warnings

WARNING: Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

Save all warnings and instructions for future reference.

1. Work Area Safety

• Keep work area clean and well lit. Cluttered or dark areas invite accidents.
• Do not operate power tools in explosive atmospheres (e.g., presence of flammable liquids, gases, or dust). Sparks may ignite dust or fumes.
• Keep children and bystanders away while operating the tool. Distractions can cause loss of control.

2. Electrical Safety

• Ensure power tool plugs match the outlet. Do not modify plugs. Use only with earthed (grounded) outlets.
• Avoid body contact with earthed or grounded surfaces (pipes, radiators, ranges, refrigerators).
• Do not expose power tools to rain or wet conditions.
• Do not abuse the cord. Keep cords away from heat, oil, sharp edges, or moving parts.
• When operating outdoors, use an extension cord suitable for outdoor use.
• If operating in a damp location is unavoidable, use a residual current device (RCD) protected supply.

3. Personal Safety

• Stay alert, watch what you are doing, and use common sense. Do not use the tool 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 safety shoes, hard hats, or hearing protection as appropriate.
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power or battery, picking up, or carrying the tool.
• Remove any adjusting key or wrench before turning the power tool on.
• Do not overreach. Maintain proper footing and balance.
• Dress properly. Do not wear loose clothing or jewellery. Keep hair and clothing away from moving parts.
• If dust extraction facilities are provided, ensure they are connected and properly used.
• Do not let familiarity lead to complacency. Careless actions can cause severe injury.

4. Power Tool Use and Care

• Do not force the power tool. Use the correct tool for your application.
• Do not use the tool if the switch does not turn it on and off.
• Disconnect from power source and/or remove battery pack before making adjustments, changing accessories, or storing.
• Store idle tools out of reach of children and untrained users.
• Maintain tools and accessories. Check for misalignment, binding, or breakage. Have damaged tools repaired before use.
• Keep cutting tools sharp and clean.
• Use the tool, accessories, and bits in accordance with instructions, considering working conditions.
• Keep handles and grasping surfaces dry, clean, and free from oil and grease.

5. Battery Tool Use and Care

• Recharge only with the specified charger.
• Use power tools only with specifically designated battery packs.
• Keep battery packs away from metal objects (paper clips, coins, keys, nails, screws) when not in use to prevent short-circuiting.
• Avoid contact with battery liquid if ejected. 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 temperature (above 130°C).
• Follow all charging instructions and charge within the specified temperature range.

6. Service

• Have your power tool serviced by a qualified repair person using only identical replacement parts.
• Never service damaged battery packs.

Hammer Safety Warnings

1. Safety Instructions for All Operations

• ? Wear ear protectors. Exposure to noise can cause hearing loss.
• Use auxiliary handle(s), if supplied. Loss of control can cause personal injury.
• Hold the tool by insulated gripping surfaces when performing operations where cutting accessories or fasteners may contact hidden wiring.

2. Safety Instructions for Long Drill Bits with Rotary Hammers

• Always start drilling at low speed with the bit tip in contact with the workpiece.
• Apply pressure only in direct line with the bit and do not apply excessive pressure.

Additional Safety Rules for Hammer

• ? Always wear a dust mask.

Safety Warnings for Battery Pack

• Do not dismantle, open, or shred cells or battery pack.
• Do not short-circuit a battery pack. Keep away from metal objects when not in use.
• Do not expose battery pack to heat or fire. Avoid storage in direct sunlight.
• Do not subject battery pack to mechanical shock.
• In case of battery leaking, avoid contact with skin or eyes. Wash affected area with water and seek medical advice.
• Keep battery pack clean and dry. Wipe terminals with a clean dry cloth.
• Battery pack needs to be charged before use. Follow charging instructions.
• Do not charge battery pack when not in use.
• After extended storage, charge and discharge several times for maximum performance.
• Recharge only with the specified WORX charger.
• Do not use any battery pack not designed for the equipment.
• Keep battery pack out of reach of children.
• Retain original product literature.
• Remove battery from equipment when not in use.
• Dispose of properly.
• Do not mix cells of different manufacture, capacity, size, or type.
• Keep battery away from microwaves and high pressure.
• Warning! Do not use non-rechargeable batteries.

Symbols

• ? Read Instruction Manual
• ⚠️ Warning
• ? Wear Ear Protection
• ? Wear Eye Protection
• ? Wear Dust Mask
• ? Do Not Burn
• Li-ion Battery: Indicates Li-ion battery technology. Proper disposal and recycling are important due to potential environmental and health hazards.

Component List

1. Depth Gauge
2. Dust Protection Cap
3. Tool Holder Locking Sleeve
4. Function Mode Selection Switch
5. On/Off Switch
6. Forward and Reverse Rotation Control
7. Battery Pack*
8. Auxiliary Handle
9. Battery Pack Release Button*
10. Depth Gauge Lock Button
11. Auxiliary Function Button on Tile

* Not all accessories illustrated or described are included in standard delivery.

Technical Data

** X=1-999, A-Z, M1-M9 are used for different customers; no safe relevant changes between these models.

*** Voltage measured without workload. Initial battery voltage reaches maximum of 20 volts. Nominal voltage is 18 volts.

Suggested Batteries and Chargers

We recommend purchasing accessories from the same store where the tool was purchased. Refer to accessory packaging for details. Store personnel can assist you.

Operating Instructions

NOTE: Before using the tool, read the instruction book carefully.

Intended Use

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

Before Putting Into Operation

A) Charging the Battery Pack

• Use only the supplied charger matched to the Li-ion battery.
• The Li-ion battery pack is protected against deep discharging. The machine switches off automatically when the battery is empty.
• Allow the battery pack to cool down before charging if it is hot from use or warm environment.
• The battery pack will accept a 100% charge after several charge and discharge cycles, especially on first use or after prolonged storage.

B) To Remove or Install Battery Pack (See Fig. A)

• Press the battery pack release button to remove the pack.
• Slide the pack back in until it clicks securely.

Operation

1. Inserting and Removing Drill Bit in SDS

• Inserting: Clean and lightly oil the bit. Insert the dust-free bit into the bit holder with a twisting motion until it latches. Check by pulling the tool.
• Removing: Retract the bit holder locking sleeve and pull out the bit.

WARNING: Use only high-quality SDS bits, as inferior bits may break and jam.

2. Auxiliary Handle (See Fig. B)

• Slide the handle onto the hammer and rotate to the desired working position. Clamp by rotating the handle clockwise. Loosen by rotating counter-clockwise.
• Warning: Always use the auxiliary handle.

3. Adjustable Depth Gauge (See Fig. B)

• Loosen the depth gauge handle counter-clockwise.
• Slide the depth gauge until the distance between its end and the drill bit end matches the desired hole depth.
• Clamp the depth gauge by rotating the handle clockwise.

4. On/Off Switch (See Fig. C)

Depress the On/Off switch (5) to start and release to stop. The switch has variable speed control; pressure determines speed.

5. Switch Lock (See Fig. C)

The switch trigger can be locked in the OFF position by placing the direction of rotation control in the center position.

6. Forward and Reverse Rotation Control (See Fig. C)

• Forward: Push control to the left " ".
• Reverse: Push control to the right " ".
• WARNING: Never change direction while the tool is rotating. Wait until it has stopped.

7. Auxiliary Function on Tile

• Pressing the On/Off switch indicates if the auxiliary function light is on or off.
• For tile work: Press the auxiliary function button (10) first (green light indicates ON). Half-press the switch to begin pulse auxiliary operation. Once the glaze breaks, press the switch fully to drill.
• For other materials: Keep the auxiliary function button off for high efficiency.

Note: The auxiliary function on tile prevents unexpected splitting and replaces pre-drilling with a glass drill bit. It is only suitable for hammer drilling mode. Turn it off for drilling, chiseling, or chuck angle adjustment modes.

8. Function Mode Selection (See Fig. D)

• Use the function selector dial (4) to set the gearbox for different applications.
• Depress the unlocking button (a) and rotate the selector to choose the desired mode.

Mode Descriptions:

• Drilling with Impact: For concrete, brick, masonry.
• Drilling: For steel, wood, plastics.
• Chiseling: For demolition tasks.
• Chuck Angle Adjustment: For setting the chisel angle.

NOTE: For chuck angle adjustment, select this mode first, adjust the angle, then select the chiseling mode.

WARNING: The operating mode selector switch may only be actuated when the tool is at a standstill.

9. Overload Protection

If overloaded, the motor stops. Relieve the load and allow the machine to cool for approximately 30 seconds at the highest no-load speed.

10. Temperature Dependent Overload Protection

The electronic control switches off the power tool if the load is too high or the allowable battery temperature (75°C) is exceeded, until the temperature returns to the optimum range.

11. Protection Against Deep Discharging

The "Discharging Protection System" switches off the machine when the battery is empty, preventing deep discharge.

Working Hints for Your Tool

• If the tool overheats, set speed to maximum and run no-load for 2-3 minutes to cool the motor.
• Always use SDS-plus tungsten carbide drill bits for concrete and masonry.
• When drilling metal, use HSS drill bits in good condition. Use a pilot hole for large diameter holes.

Problem Solution

1. Reasons for Different Charging Times

Charging time can vary due to battery charge level, ambient temperature (cold or hot), and charger cooldown periods between charging multiple batteries.

2. Reasons for Inconsistent Battery Working Times

Working time can be affected by prior charge/discharge cycles, prolonged storage, and heavy working conditions. Avoid charging below 0°C and above 40°C.

Maintenance

• Remove the battery pack before performing any adjustments, servicing, or maintenance.
• The power tool requires no additional lubrication or maintenance.
• Never use water or chemical cleaners. Wipe clean with a dry cloth.
• Store the tool in a dry place. Keep motor ventilation slots clean and working controls free of dust.
• Occasional sparks through ventilation slots are normal.

For Battery Tools

• Operating temperature (tool & battery): -20°C to +60°C.
• Storage temperature (tool & battery): 0°C to +45°C.
• Recommended charging ambient temperature: 0°C-40°C.

Environmental Protection

Disposal

Sort the machine, accessories, and packaging for environmentally friendly recycling. Plastic components are labeled.

Improper disposal of batteries can harm the ecosystem. Do not dispose of used batteries as unsorted municipal waste.

Li-ion batteries should be recycled or dismantled to reduce environmental impact.

Russian Language Section (Safety Warnings)

ОРИГИНАЛЬНОЕ РУКОВОДСТВО ПО ЭКСПЛУАТАЦИИ

ОБЩИЕ ПРАВИЛА ТЕХНИКИ БЕЗОПАСНОСТИ ПРИ РАБОТЕ С ЭЛЕКТРОИНСТРУМЕНТОМ

ПРЕДОСТЕРЕЖЕНИЕ! Внимательно ознакомьтесь с инструкциями и предостережениями по технике безопасности. Невыполнение инструкций может привести к поражению электрическим током, пожару и серьезным травмам.

1. Безопасность на рабочем месте

• Содержите рабочее место в чистоте и хорошо освещенным.
• Не работайте во взрывоопасной атмосфере.
• Держите детей и посторонних на безопасном расстоянии.

2. Электробезопасность

• Штепсельные вилки должны соответствовать розеткам.
• Избегайте контакта с заземленными поверхностями.
• Не подвергайте электроинструменты воздействию дождя или высокой влажности.
• Правильно обращайтесь с электрокабелем.
• При работе вне помещений используйте удлинители для наружного применения.
• При работе во влажном помещении подключайте через УЗО (устройство защитного отключения).

3. Личная безопасность

• Будьте внимательны, следите за тем, что вы делаете, и руководствуйтесь здравым смыслом.
• Используйте индивидуальные средства защиты (глаз, респиратор, обувь, каска, наушники).
• Предотвращайте случайный запуск: убедитесь, что выключатель в положении "Выключено" перед подключением к сети или батарее, сборкой или переноской.
• Удаляйте все регулировочные приспособления или гаечные ключи перед включением.
• Не перенапрягайтесь. Занимайте устойчивое положение и поддерживайте равновесие.
• Одевайтесь надлежащим образом. Не надевайте свободную одежду или украшения. Держите волосы, одежду и перчатки на расстоянии от движущихся частей.
• Используйте средства для сбора и удаления пыли.
• Не позволяйте осведомленности заставить вас расслабиться и игнорировать принципы безопасности.

4. Использование электроинструмента и уход за ним

• Не перегружайте электроинструмент. Используйте подходящий инструмент для каждой цели.
• Не используйте инструмент, если выключатель не работает.
• Отсоединяйте от сети и/или батарею перед настройками, сменой насадок или хранением.
• Храните не использующиеся электроинструменты в местах, недоступных для детей.
• Поддерживайте электроинструмент в исправном состоянии.
• Режущий инструмент должен быть заточенным и чистым.
• Используйте инструмент, принадлежности, сверла в соответствии с инструкциями, условиями работы и задачей.
• Ручки и поверхности для захвата должны быть сухими, чистыми и без следов масла и смазки.

5. Использование аккумуляторного инструмента и уход за ним

• Производите подзарядку только при помощи оригинального зарядного устройства.
• Используйте аккумуляторный инструмент только с оригинальными аккумуляторами.
• Неиспользуемые аккумуляторные батареи храните отдельно от металлических предметов.
• В случае протечки электролита избегайте контакта с кожей или глазами.
• Не используйте поврежденные или модифицированные аккумуляторные батареи.
• Не подвергайте аккумуляторную батарею воздействию огня или чрезмерно высокой температуры.
• Следуйте всем инструкциям по зарядке и не заряжайте вне диапазона температур.

6. Сервисное обслуживание

• Ремонт должен выполняться квалифицированным персоналом с использованием оригинальных запасных частей.
• Никогда не обслуживайте поврежденные аккумуляторы.

ПРАВИЛА ТЕХНИКИ БЕЗОПАСНОСТИ ПРИ РАБОТЕ С ОТБОЙНЫМ МОЛОТКОМ

1) Инструкции по технике безопасности для всех видов работ

• ? Надевайте защитные наушники.
• b) Используйте вспомогательную ручку(и), если она поставляется с инструментом.
• c) Держите электроинструмент за изолированные поверхности захвата при работе со скрытой проводкой.

2) Инструкции по технике безопасности при использовании удлиненных сверл с перфораторами

• a) Начинайте сверление на малой скорости.
• b) Прилагайте усилие строго в направлении сверла и избегайте избыточного давления.

ДОПОЛНИТЕЛЬНЫЕ ПРАВИЛА ТЕХНИКИ БЕЗОПАСНОСТИ ПРИ РАБОТЕ С ПЕРФОРАТОРОМ

• 1. Всегда надевайте пылезащитную маску.

ПРАВИЛА ТЕХНИКИ БЕЗОПАСНОСТИ ДЛЯ АККУМУЛЯТОРНОЙ БАТАРЕИ

• a) Не допускается разбирать, вскрывать, измельчать элементы питания и аккумуляторную батарею.
• b) Не допускается накоротко замыкать элементы питания или аккумулятор.
• c) Не допускается подвергать аккумуляторную батарею воздействию высоких температур или пламени.
• d) Не допускается подвергать аккумуляторную батарею механическим ударам.
• e) В случае протечки электролита не допускайте контакта с кожей или глазами.
• f) Аккумуляторную батарею необходимо содержать в чистоте и сухости.
• g) В случае загрязнения контактов протирайте чистой сухой тканью.
• h) Аккумуляторную батарею необходимо заряжать перед использованием.
• i) Не допускается оставлять аккумулятор на зарядном устройстве, если он не используется.

Troubleshooting

1. Reasons for Different Charging Times

Charging time can vary due to battery charge level, ambient temperature (cold or hot), and charger cooldown.

2. Reasons for Inconsistent Battery Working Times

Working time can be affected by prior charge/discharge cycles, prolonged storage, and heavy working conditions. Avoid charging below 0°C and above 40°C.

Maintenance

• Remove the battery pack before performing any adjustments, servicing, or maintenance.
• The power tool requires no additional lubrication or maintenance.
• Never use water or chemical cleaners. Wipe clean with a dry cloth.
• Store the tool in a dry place. Keep motor ventilation slots clean and working controls free of dust.
• Occasional sparks through ventilation slots are normal.

For Battery Tools

• Operating temperature (tool & battery): -20°C to +60°C.
• Storage temperature (tool & battery): 0°C to +45°C.
• Recommended charging ambient temperature: 0°C-40°C.

Environmental Protection

Disposal

Sort the machine, accessories, and packaging for environmentally friendly recycling. Plastic components are labeled.

Improper disposal of batteries can harm the ecosystem. Do not dispose of used batteries as unsorted municipal waste.

Li-ion batteries should be recycled or dismantled to reduce environmental impact.