M7 NC-4255QH 1/2-Inch Air Impact Wrench | Buy Online


1627

1/2" Air Impact Wrench

NC–4255QH

Patent Grease Hole

Re-grease in 30 seconds,
no disassembly, no service center, no downtime.

1,627 Nm at 1.70 kg — and grease goes straight in, no disassembly.

Authentic Power.

M7 NC-4255QH front view
M7 NC-4255QH right view
M7 NC-4255QH left view
M7 NC-4255QH back view
M7 NC-4255QH top view
360°





Front

NC-4255QH

1,627
NM

max torque

8,500
RPM

no load speed

1.70
KG

net weight

85.0
DBA

sound pressure

Everyday Maintenance

Still taking the tool apart
just to grease it?

For workshops using pneumatic impact wrenches every day, maintenance can easily become a problem. If the hammer mechanism is not greased regularly, internal wear can increase and torque performance may drop. But when greasing requires taking the tool apart, maintenance is often delayed until something goes wrong.

Maintenance Delay
Greasing Gets Put Off
When lubrication requires opening the tool, routine maintenance is easier to postpone.

Downtime
A Tool on the Bench Isn’t Working
Disassembly, lubrication and reassembly take the wrench—and the technician—away from productive work.

Daily Fatigue
Every Extra Gram Adds Up
When a wrench is picked up repeatedly throughout the shift, tool weight becomes part of the operator’s daily workload.

See It Working

Grease It.
Run It.
Keep Going.

Grease goes straight into the impact mechanism through the patented hole, and the tool goes back to work — 1,627 Nm of maximum torque at 1.70 kg in the hand.

Less maintenance time, less weight in the hand, and strong power for daily professional work.

Grease
Injected without disassembling the tool

Power
1,627 Nm maximum torque on stubborn fasteners

Weight
1.70 kg magnesium-alloy body in the hand

Key Features

Built To Stay
In Service.

Magnesium Alloy
Strong Without the Extra Weight
Magnesium-alloy front and rear housings combine structural strength with low weight, helping keep the tool at only 1.70 kg for repeated professional use.

Composite Body
Comfortable in Changing Temperature
The composite housing reduces direct heat and cold transfer compared with exposed metal surfaces, helping the grip feel more comfortable in hot or cold working environments.

Air Efficiency
Less Demand on the Air System
136 L/min average air consumption helps control air demand in workshops running multiple pneumatic tools.

Low Vibration
Less Vibration Through the Shift
A vibration level of only 4.7 m/s² helps reduce the vibration transferred to the operator’s hands, making repeated fastening and removal work more comfortable over longer working periods.

Specifications

The Numbers.

Model
NC-4255QH

Square Drive
1/2″

Max Torque
1,627 Nm · 1200 ft-lb · 165.9 kgf-m

Torque Range
271–1085 Nm · 200–800 ft-lb

No Load Speed
8,500 rpm

Overall Length
179 mm · 7-1/32″

Net Weight
1.70 kg · 3.7 lb

Bolt Capacity (Screw)
25 mm · 1″

Bolt Capacity (Nut)
36 mm

Air Pressure
6.3 bar · 90 PSI

Avg. Air Consumption
136 L/min · 4.8 CFM

Air Hose
3/8″

Air Inlet
1/4″

Sound Pressure
85.0 dBA

Vibration Level
4.7 m/s²

Figures from the official M7 NC-4255QH product listing.

NC-4255QH · 1/2" Air Impact Wrench with Patent Grease Hole  |  Born in Taiwan

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