Funky Two Step Journal Repair..

[zapster]

Have 2 Rubber covered rollers to repair..

I could'nt get the end too hot so the rubber would melt..
Hmmmmmm.......
What to do....

Here's the worn shaft..



Here's the bearing thats going back on..




Thats way too much to fill with weld..



So here's what we're gonna do..
Just weld as "normal" and make it all nice nice..



Put it in the lathe and turn the new bushing step..



OK...
Now I have to go down front and make a bushing..
Back in a few..

...zap!

[zapster]

I hate the other lathes...

After 20 min. heres the new bushing..



.005 shrink fit so heat it up!!



Now heres a little trick for you..
The bearing landing is .900 wide..
So make the bushing .700 wide..
Install in the middle of the landing...
And now you have .100 to fill in on each side so when you finish turn it you won't turn all the weld off..



Now weld it...



Now finish it!



The new bearing surface is .0015 bigger so the bearing will "tap" on with a light hammer...


I gave the journal where the key is the "once over" with the welder just so I know everything runs true after..
And we do not have to re-cut the key either..

I get all the fun jobs...

(And this only took 2 posts......)


...zap!

[MoonRise]

But, where's the dime????

Interesting optical interference banding in the pic of the plain bushing.

You didn't have to skim cut the keyway at all?

Nice job as usual Zap.

[zapster]

You didn't have to skim cut the keyway at all?

No we don't..
We try everything we know to stay away from the keys..
Before with the stick welder it was pretty tough to do..

But with the tig now its relativly e-z..

...zap!

[welder.man]

Nice work Zap.

[Hammack_Welding]

Nice work zap, as always.

[olddad]

Yep, nice work as usual, sure wish I'd learned the machining end of the deal at some point in time.

[zapster]

Originally Posted by olddad

Yep, nice work as usual, sure wish I'd learned the machining end of the deal at some point in time.

Lathes are fun-duh-mental



...zap!

[MicroZone]

Great job, you have both ends to do, right?

That's why you get all the fun jobs!

[usmcgremlin]

looks good like normal Zap!

[zapster]

Great job, you have both ends to do, right?

Both ends on the other one...
(Not there yet)

Just this end on this one..

...zap!

[MAC702]

Good thread. Thanks for sharing all the details, too.

Nice pics as usual.

[jamlit]

Nice work Zap.

[Joker11]

I don't see the rubber on the roller. It is hard for me to sometimes visualize what is going on. Looks like a great job.

[phila.renewal]

This kind of rings a bell. I remember reading about sleeving journals that could not be welded up as usual because of some reason I can't remember (something to do with how they were heat treated maybe?).

Anyway, shear genius as usual.

[elvergon]

SOo

what happened to the ruber? :P

Nice work zAP!

[tresi]

I wish I had a big lathe to do that kind of work. Then again I wish I had room for a big lathe. Great job.