The FORCEKRAFT FK‑AP7451 Air Impact Wrench is a heavy-duty pneumatic tool designed for professionals and serious DIYers who need reliable, high-torque performance. With a ½″ drive, twin hammer mechanism, and up to 610 Nm working torque, it handles tasks that would be extremely difficult with manual tools alone.
Features
:- ½″ square drive : Compatible with standard ½″ impact sockets and accessories
- Twin hammer / double hammer mechanism : Delivers smooth, high torque output with lower vibration
- High free speed: 7,500 RPM : Fast operation and quick tightening / loosening
- Working torque approx. 610 Nm (≈ 450 ft-lb) : Powerful enough for automotive, industrial use
- Lightweight composite / ergonomic body : Easier handling, less fatigue during extended use
- Durable construction – heat-treated rotor, shaft, impact parts : Longer life under heavy loads
- Built-in forward / reverse control : Easy direction switching for tightening and loosening
- Oil / lubrication port / bushing : Helps in prolonging life by reducing wear
- Drop-tested ruggedness : Withstands rough workshop conditions
- 3–5 seconds to reach maximum torque : Efficient performance in demanding tasks
Applications
:- Automotive / Car Repair : Removing or installing wheel lug nuts, suspension bolts, engine mount bolts, exhaust fittings
- Tire & Wheel Shops : Fast wheel changes, alignment work
- Industrial / Heavy Machinery Maintenance : Servicing large bolts, chasis maintenance, assembly/disassembly of machine parts
- Agricultural Equipment Repair : Tractors, implements, heavy attachment maintenance
- Construction Equipment : Bolting structural components, scaffolding, machinery
- Service Vans / Mobile Workshops : On‑site jobs where portability and power are needed
- DIY / Home Garage Use : For serious hobbyists who work on vehicles, bikes, small tractors, etc.
Usage
:User Instructions :
1. Check the Air Supply
- Use an air compressor rated for at least 6.3 bar (90 psi) and 6.5 CFM (183+ L/min).
- Ensure your air hose is :
- In good condition
- Properly connected
- Of appropriate diameter (typically 3/8″ or 1/2″)
Tip : Use a water trap and air filter to protect the tool from moisture and debris.
2. Lubricate the Tool
- Add a few drops of pneumatic tool oil into the air inlet before each use.
- If you have an inline oiler, make sure it’s filled.
Lack of lubrication will reduce performance and wear out internal parts faster.
3. Connect to Air Supply
- Attach the air hose securely to the wrench’s ¼″ NPT air inlet.
- Ensure no leaks or loose fittings.
4. Select the Right Socket
- Only use impact-rated sockets (black finish, heavy wall).
- Match the socket size to the fastener (e.g., 17 mm for lug nuts).
- Attach it securely to the 1/2" square drive.
Never use chrome sockets — they can shatter under impact.
5. Set Direction (Forward / Reverse)
- Use the directional switch on the tool:
- Forward: Tightening
- Reverse: Loosening
- Some models have a power adjustment knob — set it appropriately.
6. Use the Tool
- Place the socket squarely over the nut or bolt.
- Squeeze the trigger gently and gradually increase pressure.
- Let the tool hammer briefly to break loose stuck fasteners.
The twin-hammer mechanism delivers powerful torque in short bursts — don’t force it.
7. Tighten with Care
- For tightening, don’t rely only on the impact wrench.
- Use a torque wrench afterward for precise torque (especially on wheels).
Over-tightening can damage threads, wheels, or bolts.
8. After Use
- Disconnect the air supply.
- Add a few drops of oil again for storage.
- Wipe clean and store in a dry place.
Maintenance :
DAILY / AFTER EACH USE
1. Lubricate the Air Motor :
- Add 2–4 drops of pneumatic tool oil into the air inlet.
- Run the tool for a few seconds to distribute oil through internal components.
This prevents internal rust, reduces friction, and extends the motor’s life.
2. Wipe Down the Tool :
Clean the exterior with a dry cloth to remove:
- Dust
- Grease
- Metal shavings or dirt
- Keep air vents and trigger clean.
3. Check for Air Leaks
- Inspect hose connections and tool fittings for leaks.
- Replace damaged O-rings or connectors as needed.