1954 ES2 500

Hi
Does anyone know the details of the rear hub bearings. Thanks
Anji

Easy - items # 10 and 11 on the Andover hubs page.

Nortons used the same bearings in the wheels from the 1930s to the 1970s (I think ?).
The dimensions were the same all the way through anyway...

https://andover-norton.co.uk/en/shop-drawing/306/hubs

Watch that any threaded items could be different between Commandos and all earlier models though,
with the switch from Cycle Thread to Unified Threads.

A '54 ES2 shouldn't have those hubs. It should have the so called "cotton reel" hubs but the bearings are the same.

Ian

Rohan said:

Easy - items # 10 and 11 on the Andover hubs page.

Nortons used the same bearings in the wheels from the 1930s to the 1970s (I think ?).
The dimensions were the same all the way through anyway...

https://andover-norton.co.uk/en/shop-drawing/306/hubs

Watch that any threaded items could be different between Commandos and all earlier models though,
with the switch from Cycle Thread to Unified Threads.

Click to expand...

Thanks Rohan. Just confirming whether the metric sizes mentioned in the list are OK considering all dimensions on the older m/c's were Imperial.

A good enough question.
For some reasons not familiar to me, a lot of bearings used even back then were metric.
Cost is likely to be one such reason - something made in huge numbers is quite inexpensive,
although double row bearings obviously cost more.

So yes, metric is correct for wheel bearings, back into the 1930s even.

I don't think 1930s bearings had the plastic oil seals though, so their numbering should be slightly different.
The RS2 relates to 2 oil seals, one each side = Rubber Seals, 2 off (?).
Keeping the grease sealed into the bearing is a great idea, the concept of filling that vast empty space in the hub with grease so a grease nipple could actually force more grease into the bearing is just weird...