Different types of router bits

Why change the ball bearings in your router bits ?

Router bits are key components in woodworking, enabling precise cuts and detailed finishes. As they rotate, they work the wood and remove material. The ball bearings on these routers, essential to the tool's operation, can wear out over time. Routers have very high rotation speeds, in excess of 30,000 rpm. Replacing these bearings is therefore crucial to maintain optimum performance and guarantee user safety.

What is a Ball Bearing used for ?

A ball bearing is a mechanical device that reduces friction between two moving parts, in this case between the rotating cutter and the piece of wood it's working on. The bearing then acts as a guide on the workpiece. Ball bearings allow the cutter to rotate freely and precisely, essential for clean, burr-free cuts.

Fillet cutter with end bearing

Slot milling cutter with bearing on the shaft, held in place by a ring

Signs of Ball Bearing Deterioration

Deterioration of ball bearings often manifests itself in increased noise, an unusual feeling of vibration, or diminished cutting quality. These warning signs are clear indicators that bearings need to be inspected and possibly replaced to avoid more serious damage to your equipment and safety risks.

Benefits of changing ball bearings

Changing worn ball bearings not only improves cutting accuracy, but also contributes to a better user experience through reduced vibration and noise. It also extends the life of the cutters and router, preventing premature wear of other mechanical components.
Aside from wear-related issues, changing bearings, by increasing or decreasing the diameter, enables the cutter's cutting profile to be modified.

How to change ball bearings ?

To change the ball bearings, first dismantle the router.

An Allen key is generally all you need to remove the ring or screw that secures the bearing. Install the new bearing, making sure it's perfectly aligned and secured. Test the movement to make sure it's fluid and smooth.

Selecting the right ball bearings

It's crucial to choose high-quality ball bearings specifically designed for your router model. Bearings must withstand the loads and speeds typical of tool use. Opt for recognized brands that guarantee durability and performance. If you want to identify the right bearing, follow this tutorial.

If the part number is unknown or illegible, you can use a caliper to identify the right bearing by its outside diameter, inside diameter and thickness.

Preventive maintenance

To minimize bearing wear, regular maintenance is recommended. Regularly check the condition of bearings, and replace them at the first sign of deterioration. The frequency of checks may depend on how intensively the router is used, but an annual check is often recommended.

Keeping the ball bearings in your router bits in good condition is essential to ensure optimum performance and safety during your woodworking projects. Regular attention and timely replacement can help you get the most out of your equipment over the long term.