I fitted the block back into the machine today and all went well. I shall get some decent photos of all the assembly for you soon, for now all I’ve got is the block in situ and a few shed shots.
It’s an immense thing, it’s 5” around, about 35” long and very very heavy. I could just about lift it on my own into the machine, I rested timbers in between the pressure bars on the thinkness table, and simply wound it down in to the bearing cups.
4 fixings for each bearing housing, 4 cap heads on the pulley side, 2 x 5/8W and 2 x 3/8W, on the Guard/Operator side it’s 2 x cap heads at 3/8W and two 5/8W hex head bolts.
It is so buttery smooth which is great, that’s the real work all done now.
Here’s a better shot of me pulling the pulley off the block, it was mega on there, corroded and fused like it was welded. My hub pullers were no good as they were biting too hard on the delicate casting and I was worried I would bust the pulley.
The carver clamps pictured are fantastic bits of kit, and they came up trumps for me here as they went a little deeper into the guts of the cast, some heat and equal pressure and it finally released.
These lock rings snug up to the bearings, keeping it all where it should be, notice the slit near my finger, once the lock rings home there is a 3/16 Whitworth slotted screw that goes through that slit, once that’s tightened it pinches that slit up on the threads acting as loctite. Both ends of the block are the same thread, 1 1/2 dia with 14TPi (whitworth form)
operators side is left hand thread, pulley side is right handed thread.
I marred the pulley side threads up getting all the gubbings off, it was a formidable tussle between man and block I can tell you, and it’s a fairly high stakes game as there is no spares dept. with these things, out of print since 1967 or so.
So to the recuse came this immense bit of kit
this is a thread file, and I was able to get the threads back on the block using the 14TPi side just slowly making my way round, no dramas. It this bit of the job I really enjoy, problem solving along the way and when it all works out it’s a good feeling.
And here’s where I left it today, block back in and it’s fully breathing once again. It’s braked and stopping with in 10 seconds and sounding a real treat.
Almost all finished.
I’ll run through the fence assembly next as that’s a thing to behold.
Scotty