Why do these two hubs have two different thread counts?
Let's see the rest of the hubs.
Just a guess but hub a looks like an old truck hub I have around here somewhere
Anybody know what size these threads are, can a hub be re-died or just chased? Just curious...got a slightly stubborn one, don't know how much life will be left in it.
I think the hubcap thread is 2 1/8"-24, but often you don't need an expensive die, a thread file does the trick
B looks like the rear hub introduced in 1911 and used until the end of production in 1927. If A is a Ford hub, I gather it's a front one. If so, we need to see a lot more of it from both sides. Several different front hubs were used at different times.
They both look like rear hubs to me. I have found similar differences in our Canadian sourced hubs, but have no idea when/why they were introduced.
I have machined damaged threads from type B hubs so there is less thread for the hubcap to bind on, so they end up looking like the type A hub.
Stevens make a hinged tool which will cleanup/cut new threads. Someone may be able to help out.
Hope this helps,
Allan from down under.
I agree with G.R., hub B appears to be rear one for a TT. Dave
Boy, was I confused! I never thought of TT. Here's a TT hub.
And here's the car hub.
I have hubs with different thread counts. The ones that I have are for passenger cars and not trucks. I thought that it was because Ford used different suppliers for chassis parts.
TT hubs threads are bigger.
John, I'm by far no expert, but as far as I know, all T hubs use the same threads for both front and rear, '09 through'27. If you have something different, it must be for something other than Ford. I could be wrong, I learn something new all of the time. Dave
The thread pitch for car hubs is 24, and for the TT hubs it's 16. I think a car hub with a pitch other than 24 is for some other car.
Scott, you mention different thread counts. Are you counting the number of threads you see or are you counting the number of threads per inch? The threads you show appear the same to me. Each seems like the usual fine threads on T car hubs, Steve's 24 TPI.
Allan from down under.
I think he means counting the total number of threads which is less on the hub to the left.
Both would work fine I think and nothing will show with the hub cap in place.
Roger, look again. Hub B is much larger than hub A, it looks like a TT hub to me. Dave