Operating Instructions
Reaction Point Safety
Extreme care must be taken when selecting appropriate reaction points and the following must be borne in mind at
all times.
• The reaction structure must be rigid enough to accommodate the reaction forces from the torque wrench, which
can be extreme at times. Carefully assess the reaction points for suitability before applying the torque tool. If in
doubt, contact the torque wrench supplier for advice.
• Ensure that the reaction structure is suitably shaped to accommodate the reaction arm, Tapered surfaces are
generally unsuitable as the torque wrench tends to ‘ride up’ the taper, causing adverse tool loads. Flat surfaces
are most preferred.
• If in any doubt over the suitability of the reaction point, contact your torque wrench Supplier as various reaction
accessories are available which may prove more suitable.
• Don’t improvise. Packing pieces, spacers, etc. are dangerous and must never be used as a makeshift reaction
point.
Sheet No.
5 of 12
Rev
Date: 16 July 2007
REACTION ARM PARALLEL
TO SOCKET, AND BUTTED
FIRMLY AGAINST FLANGE
NUT
SOCKET
Fig 2. CORRECT POSITIONING OF REACTION ARM
