Camshaft Id.

I recently acquired a number of Norton parts from an old friend who unfortunately passed on. Probably a number of folks on the list are familiar with what this can involve. Identifying, measuring, sorting, and generally shifting boxes that may contain treasure or maybe just scrap metal.

Today I was identify Norton cams. They all had the same casting number (T2219) so I though they were all the same. But the lobe nose radius seemed to differ visually. So I checked the intake and exhaust lift above base circle. Using Dyno Dave's cam survey (below), turns out one is for a Model 7. One is for a Model 88. And two are for a 650/Atlas/Commando. No tack drive gear so Early Commando.
I was surprised at the lack of unique markings on the different camshafts.
The sorting continues.

The T2219 will refer to the unmachined cam core, so Norton would order in T2219's and then machine them to the required profile internally. Its a UK manufacturing practise that is in use to this day. All castings and forgings etc have a number and in the annual stock take will be counted and valued as such, once fully machined they become a different number which may or may not be stamped on them but would be held in stock against this second number and its stock value would be the T2219 value plus the cost of machining.