Pneumatic impact wrenches are heavy-duty high-torque fastening tools powered by compressed air for fast bolt and nut disassembly. The lightweight high-strength aluminum housing is fitted with forged quenched chrome-moly steel impact blocks with excellent wear and impact resistance. Equipped with multi-stage adjustable torque and one-touch forward/reverse switch, they are widely applied in auto repair, machinery assembly, steel structure and scaffold construction. Air-driven design generates no continuous motor heat to support long-hour non-stop operation, featuring lighter weight and longer service life than equivalent electric impact wrenches.
1. Housing: Integrally die-cast aluminum alloy, lightweight, impact-resistant and oil-corrosion resistant, stable for long-term construction use.
2. Impact Mechanism: Integrally forged chrome-molybdenum steel impact block with quenching hardening, durable under high-frequency impact without abrasion or breakage.
3. Air Inlet Joint: Standard brass pneumatic connector with tight sealing to avoid air leakage, compatible with universal 3/8 air hoses.
4. Shock-Absorbing Anti-Slip Rubber Grip: Cushioned rubber layer dampens strong vibration to relieve arm fatigue after long-time holding.
Square Drive Sizes: 1/4", 1/2", 3/4", 1" mainstream sizes, covering light maintenance to heavy industrial fastening.
Torque Range
1. 1/2" Light-duty: 120–850 N·m
2. 3/4" Industrial: 800–1900 N·m
3. 1" Heavy-duty Wrench: 1800–5000 N·m
No-Load Speed
1. 1/2": 6500–8500 RPM
2. 3/4": 4500–6000 RPM
3. 1" Heavy-duty: 2500–4000 RPM
4. Average Air Consumption: 110–260 L/min (3.8–9.2 CFM), matched with standard 6–8 bar air compressors.
Compatible Bolt Sizes
1. 1/2": M10–M20, for car tires and general small mechanical fasteners
2. 3/4": M18–M30, for truck chassis, medium steel frames and scaffolds
3. 1" Heavy-duty: M24–M42, for heavy trucks, engineering machinery, factory steel structures and large pipe flanges
1. Air-powered design avoids heat generation, supporting all-day continuous heavy-duty work in repair shops and assembly lines.
2. Multi-stage adjustable torque realizes precise light tightening and powerful removal of rusted seized heavy bolts.
3. One-click forward/reverse switch enables quick conversion between installation and disassembly to boost work efficiency.
4. Wear-resistant all-steel impact structure with universal spare parts lowers long-term maintenance cost.
5. Built-in vibration and noise reduction structure improves comfort during long continuous operation.
Vehicle tire replacement, auto chassis maintenance, engineering machinery bolt disassembly, steel structure workshop construction, scaffold assembly & dismantling, storage rack installation, agricultural machinery repair, heavy pipeline flange fastening, mining large equipment maintenance.
1. Keep operating air pressure stable at 6–8 bar; overpressure operation is forbidden to prevent overload fracture of impact components.
2. Inject dedicated pneumatic lubricating oil through air inlet before daily use, idle for 3–5 seconds to lubricate internal parts fully.
3. Only use intact size-matched standard sockets; cracked deformed sockets are prohibited to prevent flying fragments.
4. Wear safety goggles and work gloves during operation, firmly fix workpieces before activating the tool.
5. Drain condensed water in pipelines and fill lubricant for storage before long-term idle, store in cool, dry and ventilated space.
