I need to know what is the correct size thread for the T drive shaft bearing stud T-2584?
I tried W 3/8-16 and the 16 threads per inch seemed correct, but diameter of the stud measures more like 10 mm, but a tap in M 10 has the wrong pitch to match the existing holes in the rear end!
Please, also help me with the stud front end thread size.
I think those are an odd size. Something like 13/32. Someone should be along with the specs on the tip of their tongue.
13/32-16. Taps are available to chase threads.
Magnus, they're 13/32 16 threads on the end that threads into the axle housings. I believe the nut end is a different thread but, am not sure.
Magnus, the bits you need, studs and nuts, are available from the vendors. If it is the tap for the threads in the diff housing, Erik can point you in the right direction.
Otherwise, when I mounted a Moore gearbox and 13 tooth pinion combination in my roadster, I had to use bolts each end of the pinion spool rather than one long stud. The gearbox end was easy, but that odd thread in the diff was something else. In the end, I found that metric bolts, from memory 10m x 1.5 were a very close fit. I could wind them in until they began to intrude inside the diff. before they got a little bit tight.
This may or may not be of help.
Allan from down under.
Stephen -- The nut ends of the studs are the same thread, 13/32". I know because I just bought a set of studs and nuts from Lang's. Those odd-sized castle nuts are $4/ea!
Magus; where are you located someone in your area may have the tap you need. I know I do but have no idea where you are at. If you're close you can use it
Magnus lives some 300 miles north of me in Sweden, ( hej ), 13/32" taps are even rarer here than in the US. The M10x1.5 idea might not be all bad, 1.5 mm per turn corresponds to 17 tpi and 13/32" diameter is 10.3 mm, both fairly close. About 1920 when Ford changed to the open pinion bearing spool, the studs were changed to bolts. The odd thread remained the same.
I found lots of taps on e-bay for 13/32 threads. In the 25 to 30 dollar price range plus shipping. (a few had free shipping)
For cleaning up a thread, two lengthwise cuts with the angle grinder on opposite sides of a used bolt is often good enough to make a thread chaser for limited use.
The tap for chasing holes is the easy one. Try finding a die for the studs or bolts. It's made of unobtanium.
this may or may not help..
search whitworth taps & dies.
or regal cutting tools
enjoying global warming here in wisconsin
I have a partial set of oversize taps and dies made by A.B. Jardine & Co. Hespler Ontario These were made very early possibly in the teens. They are antiques to day and sometimes can be found at swap meets. Some refer to these as 13/32 however on my set they are stamped 3/8 + 1/32. I have some old turn of the century railroad connecting bolts and they are 3/4 + 1/16 aka (13/16). There were complete oversize tap and die sets for special purposes. I wouldn't recommend using a metric equivelant. Be visulant at swap meets and look for the old wood box tap and die sets, many are the over size sets.
I can't help you specifically but A.B. Jardine & Co is interesting reading.
They don't always have the "+" sign. Oversize is assumed.