CW & P ratios

[Bob Culver]

The ball bearings were not long lived in hilly everyday use but the rating of modern bearings is much increased since the 1930s (hence tiny bearings in powerful moderns). An advantage of the roller is the pinion can be repeatedly withdrawn to check assy mesh but presumably the new cwp will com with a gauge so no trial and error. Ball race much less expensive.Mind you not sold a C3 toleracne bearing. Careful thought needs be given the spacer length to ensure everything appropraitely gripped when assembled.
Dont throw out the old cwp. Anything with teeth intact might be useable!