Ball Bearing retrofit general notes (remember: links to sub-pages at the bottom of this page) click to jump to the bottom Bettendorf trucks: Use 29411 bearings drill out sideframes see Ted's article: CLICK HERE Modern freight trucks ART29101 (plastic wheels, simulated roller bearings) Use 29411 bearings Use drywall screw twisted into journal bushing to pull out bushing Press in bearings flush (take care to drive in straight) See article in Jan/Feb 2010 Aristo Insider Modern freight trucks ART29100 (metal wheels, extended axles with caps on ends that rotate, brass journal bushings) Obtain "7/32" bearings (need specs and link) Press the brass bushing out with drift and wooden block underneath to avoid damage Press in bearings flush See article in Nov/Dec 2009 Aristo Insider Harry makes mention of a 29140 bearing that fits the modern freight trucks with no drilling... Parts numbers 29411 - 10 bearings 29411B - 50 bearings Sub-Pages Click the links below to go "deeper" into details on Aristo-Craft track and switches Bettendorf BB refit vignette