# 1 Shaping the reaction bar, Fig. A

The torque reaction bar must be shaped to fit a suitable fixed support. The point of contact for the reaction bar depends on the target torque for the tightening and the length of the socket.

Determine the minimum angle a according to the table below.

To avoid overloading of the bearings for the tool drive and of the reaction bar, the point of contact on the reaction bar (K) must be as far away from the tool centre line as possible, see Fig. A.

Torque (Nm) | 200 | 300 | 500 | 750 | 1000 | 1500 | 2000 | 3000 | 4000
Angle a (degree) | 46 | 59 | 50 | 45 | 55 | 38 | 41 | 40 | 50