A new Big 7

[Jeff Taylor]

From my notes the Big 7 Pinion thrust was a high capacity split outer ring double row ball bearing (R&M 3 MDJT 25) which is unlikely to be available now but a standard double row ball bearing (SKF 3305A) will fit and with the later design and limited use should be alright.

Apparently R&M 3/MDJT25 is still available from Simply Bearings here in the UK - expensive though at £62 + VAT.