Torque Reaction - norbar ET2-72-1000-110 Operator's Manual

Torque Reaction

The reaction bar ensures all reaction forces are contained, so torque reaction is not passed back to the
operator. Several reaction bar styles are available.
Fit reaction bar as detailed below.
Reaction Bar Type
Cranked Reaction Bar (Standard)
Single Sided Reaction Plate (Option)
Double Sided Reaction Plate (Option)
Nose Extension (Option)
It is essential the reaction bar rests squarely against a solid object or surface adjacent to the fastener to be
tightened.
DO NOT react on the surface circled in red on figure 6.
React on the end of the reaction bar, circled in green on figure 6, using
the maximum area possible.
The ideal reaction arrangement has the centre of the reaction bar and the
centre of the nut on a perpendicular line to the centre line of the tool, see
figure 7.
The supplied reaction bar has been designed to give an ideal reaction point
when used with a standard length socket.
To allow for a small difference in socket length the reaction bar may
contact any point within the shaded area of figure 7.
WARNING: IF THE REACTION POINT IS OUTSIDE THE SHADED AREA EXCESSIVE
LOADS MAY BE PLACED ON THE TOOL LEADING TO POTENTIAL
OPERATOR INJURY AND DAMAGE TO THE TOOL.
Fitting Instructions
Fit reaction bar / plate over the drive square to engage
reaction splines. Secure with circlip supplied.
Fit as per instructions supplied with nose extension.
FIGURE 5 – Nose Extension
X
FIGURE 6 – Cranked Reaction Bar
(Steel or Aluminium)
FIGURE 7 – Standard Length
Socket Safe Reaction Window
11