Norbar Torque Tools has added to
its range a powered torque multiplier
suitable for the open cast
mining industry where large
haul trucks are used.

The PTM-92-
4000 replaces
Norbar’s PTM-92-3500 in the PTM-
92 series. It offers an increase in
torque output from the 92mm
gearbox, made possible with a new
output carrier made from a high
strength, specialist steel.

Pneutorque operation is quiet –
less than 85dB(A), with no
impacting, making the multiplier
comfortable for the operator to use
and reducing fatigue.

The device consists of a robust air
motor driving a Norbar multiplier
with three or more stages of
epicyclic gearing. Torque
control is achieved by
adjustment of air
pressure. An
air
pressure versus
torque graph and
calibration certificate is
supplied with each tool and allows
specific torque values to be set.