Hi Folks,
out trusty router has an ancient greenish Perske 3HP spindle head. It's 3 phase, 360Hz, 230 volt, 8 amp, via a variable freq. speed controller. The chuck/collets go up to 1/2", and are a V50-60 style from memory.

The bearings were apparently replaced a circa 2005 with ceramic bearings that suit a truck alternator, or so I was told.
Anyhow they're starting to sound a bit noisy and when you stop the router, the spindle stops quickly, instead of coasting to an eventual stop.

I think it's time to replace the bearings. We don't live near any possible technicians, so will have to resort to doing it ourselves.

My queries are-before we dissect it-does anyone know of which bearing sizes we'd need and whether they're readily avaiilable anywhere,
and secondly any tips on removing them?

Many thanks in advance!