lithium brushless wrench 21v large torque scaffolding auto repair impact wrench 锂电无刷扳手 21V 大扭矩脚手架汽修冲击扳手

1. Product Features

1. This lithium battery brushless wrench features a brushless high-magnetic motor, offering ample power output and responsive shock response, making it suitable for various bolt tightening and removal applications.
2. It features an automatic reversal and stop function; after the bolt is loosened, the impact output automatically terminates, preventing the nuts and bolts from flying away or getting lost, thereby enhancing safety during on-site operations.
3. With a ultra-short body structure, the device features a compact layout. It is equipped with a laser engraving anti-slip ergonomic handle, along with anti-slip textures on the surface for stable grip, suitable for prolonged continuous handling tasks.
4. Configured 360° surround high-brightness shadowless lighting with a surround output shaft; eliminates working shadows in low-light environments such as device base, sealed enclosures, and outdoor settings at night, eliminating the need for additional external lighting fixtures.
5. 1/2" standard square output shaft, compatible with mainstream sleeve components on the market. The sleeve is easy to install and remove, and component procurement and replacement are convenient.
6. 21V high-voltage platform paired with a large-capacity battery pack, with a lithium battery wireless design, eliminating the need for power cables. It can be used flexibly in construction sites, factories, and outdoor mobile operations.

2. Product Advantages

1. Compared to traditional brushed impact wrenches, the brushless motor structure reduces carbon brush friction losses, lowers overall heat generation, extends the overall lifespan, and optimizes operating vibration levels.
2. The reverse stop function can effectively control the disassembly impact force, eliminating the need for manual monitoring of the trigger stroke. This reduces the likelihood of part loss and is suitable for large-scale bolt assembly and disassembly tasks.
3. With its compact body design, it can perform assembly and disassembly operations in narrow and restricted spaces such as scaffold gaps, inside vehicle chassis, and equipment interlayers, covering various complex work locations.
4. The dual-speed settings can be switched freely. The slow mode is suitable for tightening bolts with high precision, while the fast mode is used for quickly removing rusty or stuck bolts, meeting various operational needs.
5. 2.1V voltage paired with a 4.0Ah large-capacity battery; each battery can support multiple shock operations, reducing the frequency of frequent charging; the battery supports hot plug-and-unplug replacement, ensuring continuous operation.
6. The lighting is arranged around the working axis using an invisible lamp; the points of operation covered by the sleeve are directly illuminated, preventing any obstruction that might cause unclear visibility of the bolts.

III. Product Applications

1. Tire nut removal and installation for vehicle repair, bolt removal and installation for chassis suspension components, and routine fastening maintenance for construction machinery.
2. Scaffold steel structure: Operations related to the construction, erection, and demolition of building scaffolds, as well as the tightening and disassembly of steel structure frame bolts.
3. Factory equipment maintenance: Inspection, repair, and replacement of bolts on production equipment units and transmission components.
4. Engineering installation scenarios: guardrails, steel structure billboards, and photovoltaic support bolt tightening and maintenance.
5. Storage rack assembly: Assembly and maintenance of heavy-duty storage racks and equipment bracket bolts.
6. Metalworking and assembly: assembly of metal components, and the disassembly and installation of various standard bolts.
7. Adapted bolt sizes: M6–M14; not applicable for oversized bolts during continuous heavy dismantling operations.

4. Target Audience

1. Mechanics and technicians at auto repair shops, and professionals in construction machinery maintenance.
2. Workers responsible for erecting construction scaffolding and constructing steel structures.
3. Personnel responsible for maintenance and repair of factory workshop equipment.
4. Photovoltaic brackets and outdoor guardrail installation workers.
5. Personnel involved in the installation and commissioning of storage equipment.
6. A contract service team responsible for undertaking projects, installation, and maintenance on-site.
7. Furniture processing store on-site processing service staff.

5. Product Attributes

1. Battery voltage: DC 21V
2. Battery capacity: 4.0Ah
3. Output shaft: 1/2" square shaft
4. Idling speed: 0‑2,400 rpm
5. Impact frequency: 0‑450/0‑4000 ipm
6. Maximum torque: 330 N・m
7. Adaptable bolt sizes: M6‑M14
8. Motor type: brushless high-magnetic motor
9. Special features: Reverse auto-stop, dual-speed adjustment, 360° swivel shadowless lamp
10. Machine net weight: 1.4 kg [* This is an additional parameter for industry reference; the original sample does not have this data]
11. Battery type: Removable lithium-ion battery pack

6. Usage Instructions

1. Battery installation: Take the fully charged lithium battery pack and push it inward into the bottom slot of the device. When you hear a click sound from the latch locking, ensure the battery is fully seated; when removing the battery, press the side latch and pull it downward.
2. Sleeve assembly: Make sure the machine is shut down and powered off. Select the appropriate size sleeve, insert it fully into the 1/2-inch square output shaft. Verify that the locking bead on the shaft secures the sleeve completely, with no looseness or movement.
3. Gear adjustment: Select the gear based on the bolt conditions. Use a slower gear for bolts that require controlled tightening force, and a faster gear for bolts with rust-induced blockages.
4. Turning control: Move the central shift switch on the vehicle. Moving it leftward activates the forward tightening bolt; moving it rightward activates the reverse removal bolt. When the switch is in the middle position, it acts as a safety lock, and the trigger cannot trigger startup.
5. Power-on operation: After confirming all components are set, pull the trigger; the depth of the trigger press can control the speed output. During operation, the shadowless light around the device turns on simultaneously. In reverse disassembly conditions, if the bolts become loose, the equipment automatically stops and stops outputting power.
6. Task completion: Release the trigger, wait for the output shaft to stop rotating completely, move the direction switch to the middle safety lock position, and remove the sleeve; after completing the task, remove the battery and store it separately.

7. Precautions

1. Wear safety goggles at all times during operations, as impact tasks may generate metal debris. Avoid any debris flying to cause eye damage; it is recommended to wear anti-slip protective gloves; do not wear loose clothing or hang any accessories to prevent getting caught by rotating parts.
2. Only sound, undamaged and undamaged qualified sleeves may be used. Any damage to the sleeve must be replaced immediately to prevent the sleeve from breaking and spilling during operations.
3. During the operation of the equipment, hands must not touch the rotating sleeve or the output shaft. The entire machine must come to a complete stop before replacing the sleeve or making any adjustments to the equipment.
4. Forbidden to perform forced disassembly or assembly on bolts with specifications above M14; exceeding the equipment's capacity may cause motor overload and damage.
5. Lithium batteries should be kept away from high-temperature sources and open flames. It is strictly prohibited to puncture the battery pack casing; when not in use, remove the batteries and store them in a cool and dry place to prevent water ingress and moisture.
6. For prolonged continuous operations, if the body shell temperature rises significantly, the machine must be stopped and allowed to cool down to prevent motor overheating damage.
7. Do not operate this device in humid or rainy conditions to avoid electrical leakage risks.
8. The equipment must be stored in a location out of reach for children; children are strictly prohibited from operating this tool.
9. During the operation, there was a sleeve slip and an unusual noise from the body. The machine must be stopped immediately with power off; it can only be used again after troubleshooting and repair are completed.