# Optimizing the Tool Performance

It is not recommended to use extensions with pulse tools. Extensions cause vibrations, which in turn may cause wear on the tool, longer tightening time, limited accuracy and difficulty reaching maximum torque. If an extension is necessary due to accessibility constraints, it should be as short as possible. Guided sockets or extensions are strongly recommended.

## Recommended number of pulses

The pulse tool shall reach the target torque, with shut off, within 5-20 pulses. Measure the number of pulses to reach the target torque with an analyzer. The tightening time can also be used as a guide, to know if the tool is set correctly:

- ≤ 1 second for tools up to 30 Nm

- ≈ 1 second for tools up to 80 Nm

- ≈ 2 seconds for tools up to 150 Nm

- ≈ 5 seconds for tools up to 450 Nm

- ≤ 10 seconds for tools up to 850 Nm

If the target torque is reached within less than 5 pulses (= short tightening time), the torque scatter will increase and it can be difficult to adjust to the right level, especially on hard joints.

If the target torque is reached after more than 20 pulses (= too long tightening time) the wear will increase and more frequent oil filling and service will be required. Too long tightening time, in combination with high production rate, may also result in excessive heating of the oil. In that case the power will decrease with longer tightening time and sometimes no shut off.

If the target torque is reached within less than 5 pulses, adjust it by:

- Decreasing the air pressure.

- Reducing the speed with the AutoTrim or Trim valve.

- If the above is not possible or does not give the wanted results, a smaller tool may be a better choice.

If the target torque is reached with more than 20 pulses, adjust it by:

- Increasing the dynamic air pressure to 6-7 bar for standard EP tools, or up to 5 bar for low pressure EP L-tools.

- Adjusting the AutoTrim or Trim valve to give maximum power/speed.

- If the above is not possible or does not give the wanted results, a bigger tool may be a better choice.

When changing the air pressure, measure the target torque again and adjust it if needed.