(Chair bases with welded on stems/casters, require replacing the entire chair base).

There are several methods which can be used to remove a castor

• Simply grab it and pull. A drop of 3 in 1 oil into where it is being held, is very helpful. If the wheels pull off and the stem still remains in the chair base, try another method.
• Prying-This method works. Use the nail puller end of a claw hammer. Place the nail pulling open end between the ridge on the castor stem and the chair base. Locate a leverage point to pry down onto and pull the hammer handle downward. Especially if you used a drop of oil, the stem should rise up a small amount providing an even better bite of the stem. When partly removed or for more leverage, you may need to place a thin piece of wood on top of the leverage point to press the hammer against for the stem to remove evenly and entirely.
• Prying-With a wide screwdriver, twist tip to raise the stem slightly enough to insert the nail pulling end of the hammer or use a pry bar. Using the screwdriver only to remove the caster will result in stabbing yourself and making a hole in your hand. It hurts!

How to install a Castor