What is the most important part of the router bit?
Believe it or not, the shank (shaft) of the router bit is the most important part. If the shank is not perfectly concentric, there will be excessive vibration, run-out and imbalance, and can cause poor quality cutting. This is particularly important for large diameter router bits which can be extremely dangerous if they are not properly manufactured. Equally important is the accuracy and condition of the router collet.
