Many of us come by large & heavy old chucks and other fitments, so this
discussion by our engineers and others with experience should be a
helpful guide. Leo's use of 'slight' piques my interest. Does a heavy
but balanced and empty chuck put damaging stress on lathe bearings? If
so, are there any guides as to how heavy the chucks, spindles and
bearings need to be to be compatible? FWIW, once I was warned by an
Atlas Co. employee not to adapt their 3 jaw chuck made for their 12 in.
lathe to their 6" lathe as it would ruin the bearings. Arch

Fortiter,