20V Brushless Impact Wrench 350N.m Torque with Auto-Stop Function from China Suppliers & Factory
High-Torque Brushless Performance & Robust Drive System
The core of the KIW21801 is a high-efficiency 4815 all-copper brushless motor, engineered for maximum power delivery, superior heat dissipation, and extended service life without the maintenance of carbon brushes. This motor generates an impressive 350N.m of maximum torque, capable of tackling stubborn lug nuts, large bolts, and heavy-duty fasteners with ease. The torque is transmitted through a robust 1/2" square drive chuck and a tungsten steel shaft, renowned for its exceptional hardness, high melting point, and impact resistance to withstand years of rigorous use.
Intelligent Control for Efficiency & Safety
This impact wrench incorporates intelligent features designed for professional workflow. The stepless speed trigger allows for precise, variable control from 0 to 2600 RPM by adjusting trigger pressure. A critical innovation is the reverse auto-stop function: when loosening a fastener, the motor automatically stops rotation as the bolt or nut is released, preventing it from falling off and getting lost, thereby saving time and enhancing safety on the job site. A dedicated forward/reverse switch provides easy control over tightening and loosening directions.
Durable Construction & Ergonomic Design
Built for longevity in tough environments, the wrench features an all-aluminum machine head that provides excellent durability and heat dissipation. The ergonomic soft-grip handle ensures comfort and control during prolonged use, reducing user fatigue. An integrated LED work light illuminates dark workspaces, while a clear power indicator on the compatible 20V battery (available in 2.0/3.0/4.0Ah) shows remaining charge at a glance. All batteries include comprehensive protection against over-current, over-charge, over-voltage, and overheating.
Versatile Professional-Grade Applications
As a true multi-purpose tool, the KIW21801 serves primarily as a high-torque impact wrench for automotive repair (wheel changes, suspension work), machinery maintenance, and steel construction. Its power and drive system also make it suitable for use as a powerful driver for large lag screws and bolts, effectively functioning in roles beyond a standard wrench. It is the ideal cordless solution for mechanics, fabrication workshops, and construction crews requiring reliable, high-torque fastening power.
| Model | KIW21801 (Around Series) |
| Motor Type | Brushless Motor (Model 4815) |
| Voltage | 20V DC |
| Max Torque | 350 N.m |
| No-load Speed | 0 – 2600 RPM |
| Impacts per Minute | 0 – 3000 BPM |
| Chuck Type | 1/2" Square Drive |
| Head Construction | All-Aluminum with Tungsten Steel Shaft |
| Key Features | Reverse Auto-Stop, Stepless Speed, LED Work Light, Battery Gauge |
| Battery Options | 2.0Ah / 3.0Ah / 4.0Ah Lithium-Ion (with full protection) |
| Charging | Dedicated AC-DC Charger (1-2 hours) |
| Product Weight | 1.784 kg |
| Product Dimensions | 161 x 77 x 255 mm |
| Customization | Full OEM/ODM support available |
