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Ideal for Railways, Construction sites, Oil and Mining Industries, Shipyards.

General features:


impact wrenches


















1 - Fuel Tank
This large tank has a 1.2l capacity for longer working time between refifills. The gripping surfaces on the cap make it easy to remove/replace and the facility to add fuel in both vertical and horizontal positions avoids accidental spillage.


2 - Handlebar 
Careful ergonomic design of the machine spreads the weight equally between left and right handles. The structure formed by the combination of the shaped handle bar and the protective shield minimise the risk of accidental mechanical shock to the fuel tank and engine.


3 - Control handle
Control buttons are specifi cally located to reduce the effects of working in awkward positions, eg wrist and shoulder discomfort, thereby optimising performance in both vertical and horizontal modes, while a Dead man device prevents accidental acceleration, for operator safety. The control handle assembly is clamped to the handlebar via a steel rod for enhanced robustness.


4 - Trolley
Optional interface kits enable the machine to be used in vertical and horizontal modes with the rail mounted support trolley. Fitted with a braking device in accordance with EN19277, the trolley eliminates much of the effect of the weight of the machine and allows rapid movement between work areas.


5 - Gearbox
Brightened steel gears are immersed in a synthetic oil bath to prolong life and extend the range of permitted working temperatures. The gear change lever is adjacent to the accelerator control in order to avoid damage caused by changing gear while the engine is running. Smooth acceleration is provided by the centrifugal clutch.


6 - Impact mechanism
The innovative patented impact unit develops a high torque and has a larger impact surface than any other nut runner, so to extend the life of this essential component. Specialist, high spec grease minimises wear in this area and the special seal on the drive prevents the leakage of grease commonly seen on other impact wrenches.


7 - Engine
With a greater impact surface, the NR11P does not need higher rpm to develop 2500 Nm thus the engine is not conitnuously straining at maximum rpm, allowing maintenance intervals to be extended.


8 - Vibration
The handlebar is mounted on 4 vibration absorbing dampers so to reduce handarm vibration felt by operators.


9 - Easy-start
With its decompression button, primer and digital ignition coil, minimum time and effort are required to start NR11P.


Protective shield
To protect tank
and engine from
accidental shocks

Torque selector
With 5 positions

Smooth change




Assembly of steel structures such as bridges, building frames,rail tracks, ship building, heavy equipment maintenance, pipelines and industrial applications.



Anti-vibration couplings reduce transmission of vibration to the operator.

The protective handlebar structure facilitates a comfortable dorso-lumbar operating position without wrist injury.



Impact wrench mounted on support trolley with interface kit









A reduced mandrel axis to machine base dimension facilitates a more convenient horizontal position for working with track bolts, even when operating across sleepers.



Impact wrench mounted on support trolley
with interface kit


Directive 2006/42/EC Directive 2006/42/EC

Technical characteristics Other characteristics

Engine two stroke, forced-air cooled, single cylinder
Engine two stroke, forced-air cooled, single cylinder
Displacement 55 cm3
Fuel tank capacity 0.31 Gal
Fuel mixture: syntetic oil 1:50 or 2 stroke mineral oil 1:25
Motor revolutions (to the minute) 2800 rpm
Engine revolution (loaded, impact) 7000 rpm
Engine revolution (non loaded, max.) 11500 rpm
Start digital; spark plug type RAX80 or equivalent
Carburettor type diaphgram
Impact unit square driver size 1 in.
Impact unit max. fastening torque range 2500Nm
Height 10.79 in.
Width 16.97 in.
Length 25.2 in.
Weight 42.24 lbs.

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notes and legal information

Cembre Via Serenissima, 9 - 25135 Brescia - ITALY
© Copyright 2022 Cembre S.p.A.

CODICE FISCALE – P.IVA: 00541390175
CAPITALE SOCIALE: € 8.840.000 i.v.