What kind of Wide Five Drum is this?

[BlueNotes]

Originally Posted by 34fordy

That sure looks like it could be a 5 on 5-1/2 Clayton. However the step to support the spoke wheel doesn't appear to have the little flat area at the edge. My lathe is only 10" so I couldn't get it in the chuck to take care of it anyway. Wouldn't that be great if you could go forth and back with different wheels? That would be a heck of a hunt for four hen's teeth in a bale of hay, huh? LOL

Originally Posted by cas3

I think its a bolt on to make either the hub or drum replaceable if need be. Imagine there is probably some NOS drums around that nobody knows what they fit! This one was really good on drum wear, only .15 or so, but the hub had sat outside for decades and wrecked the bearing surface. Lars had a plan to re-machine the hub to take a different bearing. He has a beautiful old school 34 highboy roadster. He's a member here...perhaps will chime in

Don and Clayton,
The first one is a two piece bolt on drum, but it's not possible to use the early 5x5-1/2 spoke wheel on it. I have no source to confirm it, but I believe this drum may have been used only as a temporary carry over design for final use of excess stock of 1932-35 rear wheel brake drum hubs with the large 1928-35 wheel bearing (B-1225-A) on the early 1936 produced cars. The second drum is a one piece cast drum with a sleeve bearing race for the smaller 1936-48 wheel bearing (68-1225-A). This drum was also only used in early 1936 production and then later superseeded by the common 1936-39 wide five rear drums we see all over. Maybe it was superseeded for cost and/or quality reasons because I believe it's easier and less expensive to cast the later rear 1936-39 drums.
//Lars