Hello All
With the assistance of Chris Streather, the following references have been provided to the NOC Library:
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FAG Ball & Roller Bearing Catalogue 41000E 1966 [REF 28]
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Ransome & Marles Ball & Roller Bearing Catalogue Publication No. 42 Issue 5 (undated but merged into RHP in 1969) [REF 43]
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RHP General Bearings Division Catalogue 1972 [REF 31]
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FAG Rolling Bearings Catalogue 2014 [REF 7]
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Collection of related magazine extracts [REFS 20, 27, 40]
The [REF nos] are from the detailed reference document titled, A summary of data and information on Norton Commando main bearings, which was summarised in articles in Roadholders 352 (April 2017) and 366 (June 2018).
The detailed reference document is located under the NOC website Technical Section here:
https://www.nortonownersclub.org/support/technical-support-commando
...and here:
https://www.nortonownersclub.org/support/technical-support-heavytwins
And may also be reached using this link: https://www.nortonownersclub.org/sites/default/files/Main-Bearings-v1.1.compressed.pdf
Thanks to all the NOC and Access Norton folks who helped with this work and those who made the results and references available.
Andy
