# Preventive maintenance

Service should only be carried out by trained technician following provided service instructions and using original Atlas Copco spare parts.

The preventive maintenance intervals are based on the following definitions of use:

- Tools are tested at their maximum torque. Operating at a lower target torque results in longer service intervals and reduced maintenance frequency.

- The application is to assemble machine screws into metal threads. The typical run-down torque is below 15% of the target torque. Thread cutting or thread forming applications with high prevailing torque will reduce the service interval of the motor.

- The tightening angle ranges from 30° (hard joint) to 720° (soft joint). The tightening angle is measured between seating and target torque. A higher tightening angle will reduce the service interval of the motor.

- The highest possible speed for each torque level and joint characteristic is recommended. Lower speeds at high torque will reduce the service interval of the motor.

- The feed force is limited by the axial load limitations of the ball bearings to a maximum of 80 N. A low feed force ensures good tightening accuracy and increases the service interval for the front part. High load and/or high-speed impacts to the front part can damage the ball bearings.

- The vacuum pickup system will increase wear on the rubber sealings of the ball bearings, reducing the service interval for the front parts.

- Tightening problems such as overshooting, stuck bits, and bit slip can reduce the service interval of the tool. These problems can be minimized by proper programming, using limits, and dividing the programming into several steps with different limits.

  For more information about tightening strategies and troubleshooting, please refer to the configuration manual for ToolsTalk MT.

Interval | Action
--- | ---
1.500.000 cycles or 1 year | Calibrate the tool
1.500.000 cycles | Exchange bit grounding
3.000.000 cycles | Exchange front part Only applicable if the tool is used together with a vacuum adapter.
3.000.000 cycles | Exchange motor