Two bearings are better than one - if the length of your bit shaft and router collet safely allow it.....add another.
This 19mm/8mm shaft Luna Tools bearing-guided template bit from neteberg.eu is a prime candidate for an additional bearing. The code for a 19mm OD, 8mm ID shielded bearing is 698ZZ. A few of these cost a couple of Euros. A bargain considering that one "official" bearing costs €6!
The collar was loosened with an Allen key and removed. Now's a good time to clean up your cutter and existing bearing. Wipe off any excess packaging machine oil from the new bearing with an alcohol-soaked cloth, drop it on with the original and you're good to go.
Safety note: router collets require a certain length of shaft inserted to ensure a secure safe fit. If you're not 100% sure what this is then think twice about reducing the available shaft length by adding more bearings!
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