Answer: Random orbital sanders are designed to be used with specific sized pads, with a precise weight. Make sure you are using the correct size pad, and that it is in good condition.
Changing your backing pad when necessary will keep the vibrations of your sander to the minimum. Large chunks of missing pad material will cause imbalance.
If you are using a pad saver, make sure to counter balance it correctly.
Mirka also offers balancing screw kits for power tools.
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Do Mirka sanders come with a pad wrench?
Answer: A wrench is supplied for changing the backing pad on a Mirka DEROS, Mirka PROS or Mirka ROS. You can find it located in the original packaging of the sander.
