Quote Originally Posted by Chaz View Post
With the DWH epoxy, it will follow the shape down to the micron. That is one of the uses of the epoxy and it doesnt shrink. Removing it, well, agreed, that might be interesting.

The Concrete with a tight fit epoxy will provide a lot of strength and vibration damping. I need to check however, on the 4KW spindles, the pictures show that there are no 'lips' on any of the structure, so it can be removed once cast (lets assume its greased or similar). If it has a diameter larger anywhere, this will be the minimum I can do which means that the concrete is just there to provide overall damping and strength to the plate.
Yes Know about the accuracy of The DWH Epoxy but still think will cause trouble and then if you talking Chinese type spindles like 2.2kw how would you clamp it or stop it from sliding etc. Would need plates making or some form of fixture.?

Think I'd be going with more conventional Cartridge spindle into sleeve set in concrete. This will give more options for replacement etc. ie 40 taper
Also why not BT30 for 12K can get them with bearings rated at those speeds and plenty of holders that are balanced for higher speeds.