Page 50 - 诺霸英文2022

HANDTORQUE® MULTIPLIERS

ANTI WIND-UP RATCHETS (AWUR)

Norbar Anti Wind-Up Ratchets (AWUR)

Most multipliers with ratios of 15:1 and over are fitted with an Anti Wind-Up Ratchet. The multiplier can be thought of as a spring
which must be fully wound before any tightening/untightening work can be applied to the bolt.
The AWUR ensures that the 'spring' stays wound and that any further torque input to the multiplier is applied directly to the bolt.

Multiplier behaves like a very stiff 'spring' Multiplier will achieve maximum torque only
after the 'spring' has been taken up

Torque Reaction Force

AWUR benefits include:

1� The torque input device cannot fly backwards against the direction
of operation if it is suddenly released.
2� Without an Anti Wind-Up Ratchet, it will often be necessary
to continue to make 360° sweeps with the torque input device
otherwise the multiplier will ‘unwind’. However, obstructions will
often make this impossible (as demonstrated in this example).

AWUR set to counter-clockwise operation AWUR set to neutral AWUR set to clockwise operation

49 enquiry@norbar�com | www�norbar�com