kolias can you please post some pictures of the taig spindle with measurements? I would like to reuse the colt mount rather than drill the z axis plate for new support.
Lee DeRaud, there are bearings in this size range that can do that and they are steel. Check out McMaster item 2385K42, rated for 50K RPM and over 1k lb. But you'll be singing 'Can't touch this' for $202 like I did .