Whether CBN (Cubic Boron Nitride) inserts can be resharpened after wear depends on several factors:

Extent of Wear:

Light wear: If the insert exhibits light wear, particularly minor wear on the tip or edge, it is often possible to restore its performance through appropriate resharpening.

Severe Wear: If the insert is severely worn, especially if significant material has been lost, resharpening may not effectively restore its original performance, and replacement is usually recommended.

Insert design:

Some CBN inserts are designed to be sharpened repeatedly, while others may not be suitable for resharpening. Checking the manufacturer’s instructions can help to determine if resharpening is possible.

Resharpening techniques:

Resharpening CBN inserts requires specialised equipment and techniques to ensure that the geometry and cutting performance of the insert is maintained. Using improper resharpening methods may result in damage to the insert.

Economic Considerations :

In some cases, the cost of resharpening CBN inserts may approach or exceed the cost of purchasing new inserts. Therefore, evaluating the economics of resharpening is also an important consideration.

Whether CBN inserts can be resharpened after wear depends on the extent of wear, insert design, resharpening techniques, and economic factors. If resharpening is considered, it is advisable to seek professional tool resharpening services to ensure that the performance of the insert is restored. For severely worn inserts, timely replacement is usually a better option.