Single row roller bearing. Fitted to all pushrod and sidevalve engines (from 1930's to late 1950's).. These are original high quality RHP bearings (plastic sealed), in the correct C3 fit.
Update Nov 2024 - Sorry, - Original 'RHP/'C3' fit' type now long time obsolete and not attainable at all (last price I listed it at was £210.00 in 2022!). Instead - see our listing for Item 1073 - which is the original 'C3' (looser fit) version, as per this bearing - but from an alternative make - NKE.
We do occasionally also manage to find the original (highest quality) RHP version of this bearing in 'STD' fit (i.e. not original 'loose' C3 fit) - if our bearing stockist is able to trace some 'New old stock'. For these, they are the best quality - but STD fit just means you need to be a little bit more careful about running in, once fitted. For availability of these - see Item 1009
Norton OHV Main Bearings - Additional Information:
Final point on ball and roller main bearings fitted to 1930's/50's OHV and SV engines: Unusually, Norton's showed a roller bearing being fitted on both sides of the crankcases on OHV/SV engines (i.e. 1948 catalog), with a ball bearing fitted just on the outer drive side. However, I have stripped OHV engines down in the past where a ball bearing is fitted both sides, with just the drive side inner being a roller bearing (as was the case with all SOHC engines). Not sure if it makes a great deal of difference - as like the SOHC engine, the OHV/SV engine was locked to the timing side bearing - but worth noting if you are struggling to find two roller bearings (and once ours have inevitably ran out). Update: 2023: However - as we are now able to source the NKE make (a slightly less high quality brand from Austria, than the original RHP) in original C3 fit . . . they are available for both timing and drive side again now.
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