Typically,Timken have price levels for slow moving stock that are hair raising..............old taper roller motorbike wheel bearings being an example..............if available ,prices in the hundreds...............Now i have reco ed a number of lathes replacing old precision bearings with stock bearings..............I only use SKF,Koyo ,or another top jap brand that is actually made in Japan.......I have found that you can expect runouts of half a thou typically with taper rollers................and its much easier to get much better precision with angular contact/or even deep groove balls.(and cheaper).The reason I steer clear of Timken is most of their production is third world,and I am suspicious of the very cheap Timken big truck wheel bearings that sell for about $50 ....a wheel......big bearings....that IMHO cant possibly have super precision( ,and dont need it.).............there are also large markups in the bearing trade.....with monthly account customers getting an 80 % discount at a $5000/month buy point..........and bearing distributors marking $100 retail on a $5 buyin cost.....before overheads ,obviously..........stock theft used to be very high in the trade.