# Verifying free speed

WARNING

Risk of severe injury

Air under pressure can cause injury.

- Always shut off the air supply when not in use or before any adjustments.

- Drain the hose of air pressure and disconnect the tool from air supply when not in use or before any adjustments.

- Always use the correct hose size and air pressure for the tool.

WARNING

Risk of injury

- Always lock autobalancer with applicable part before starting the tool.

- Never measure free speed with a backing pad attached.

- Measure the free speed daily.

Required tools:

- Face spanner

- Tachometer

Instructions

1. Press the spindle lock button forward and keep it pressed while tightening the adapter using a face spanner.

2. Connect the tool to the air supply.

3. Put a tachometer in the spindle hole.

4. Start the tool and measure the speed at a pressure of 6.3 bar.

   Make sure that the throttle lever is pressed down to the bottom and measure the speed for at least 1 minute

5. Remove the tachometer.

6. Verify the free speed on the tachometer with the speed marked on the tool.

   WARNING

   Risk of injury

   - The measured speed must not exceed the stated maximum speed marked on the tool. Return the tool to an authorized service center in the event of overspeeding.