(Also known as Battery-Powered Impact Gun / Cordless Torque Wrench)

A cordless impact wrench is a battery-operated tool that provides high torque for fastening. It uses a hammer-anvil impact mechanism to tighten or loosen nuts and bolts.

This tool delivers the powerful performance of pneumatic impact wrenches without the need for air hoses, compressors, or power cords.

Cordless impact wrenches are commonly used in automotive workshops, industrial assembly, construction sites, maintenance tasks, and field repairs.

Key Features

1. High-Torque Brushless Motor

• Delivers consistent torque with high energy efficiency

• Long runtime and reduced heat generation

• Improved durability for heavy-duty cycles

2. Hammer–Anvil Impact Mechanism

• Creates intense, repeated impact pulses

• Breaks loose stubborn or rusted fasteners

• Allows high torque delivery with reduced user wrist strain

3. Lithium-Ion Battery Platform

• 18V / 20V / 40V battery options

• BMS protection (overheat, overload, overcharge, short-circuit prevention)

• Interchangeable with other cordless power tools in the same ecosystem

4. Professional Torque Output Ranges

Typical torque classes:

• Compact Models: 150–250 Nm

• Mid-Torque Models: 300–500 Nm

• High-Torque Models: 700–1,000+ Nm (suitable for heavy bolts, truck service)

• Ultra-High Torque Models: 1,200–2,000+ Nm (industrial-grade)

5. Variable Speed & Modes

• 2 to 4 speed/power modes

• Forward/Reverse with auto-stop or auto-slow features

• Electronic brake for fast stopping

6. Durable, Ergonomic Construction

• Magnesium or reinforced composite housing

• Anti-slip rubber grip

• LED work light

• Shock and vibration reduction design

Typical Applications

Automotive & Transportation

• Wheel lug nuts

• Suspension & chassis fasteners

• Heavy vehicle maintenance (trucks, buses)

Industrial Assembly

• Machinery installation

• Plant maintenance

• Heavy equipment fastening

Construction

• Structural bolt fastening

• Steel assembly work

• Scaffold or frame construction

Agriculture & Field Work

• Fastening/repair outdoors where no cord or air supply exists

Advantages of Cordless Impact Wrenches

• No air hose or compressor needed

• High mobility — ideal for remote or outdoor jobs

• Fast, powerful fastening & loosening capability

• Lower noise than pneumatic tools

• Highly ergonomic for long shifts

• Compatible with modern torque-traceability systems (when paired with smart sensors)

OEM / Engineering Design Considerations

1. Motor & Geartrain

• BLDC motor required for professional-grade torque

• Precision planetary gearbox for torque multiplication

• Heat-dissipation design is critical for continuous duty

2. Impact Mechanism

• The quality of hammer & anvil steel significantly affects durability

• Surface hardening and optimized metallurgy improve the life cycle

• Impact energy tuning determines the torque curve and ergonomics

3. Electronics

• MOSFET power stage for high current

• MCU control for torque mode, RPM, and thermal limits

• Protection: overload, stall, and overtemperature safeguards

4. Battery System

• Needs high-discharge cells for peak current

• Proper thermal design around the battery foot

• Compatibility with OEM battery families

5. Ergonomics & Safety

• Weight distribution with battery attached

• Low-vibration handle

• LED lighting and dust-resistant switches

Common Product Configurations

• Bare Tool (No Battery/Charger)

• Single-Battery Kit (Tool + 1 Battery + Charger)

• Contractor Kit (Tool + 2 Batteries + Fast Charger + Case)

• Industry Kit (with sockets, protective boots, or torque-stick accessories)