Delta Band saw vibration

[Janderso]

Hi gang,
I'm slowly refurbishing my 14" Delta/Rockwell saw. It's a 28-300.
I replaced the upper bearings. They were toast, what a difference.
I should have the new tires today. I installed new belts and I have a new blade.
I have the high speed and low speed working slick.
My question,
I haven't ran it yet after the new parts. I know old blades that have been on a saw for 20 years under tension are junk, I know the v-belts have a memory, they were just full of movement.
The vibration should be greatly improved but I have a lower wheel the has lateral run-out that is pretty severe.
I know it's going to contribute to vibration.
Is there any way of straightening these wheels?
Do I just replace it?
I have to figure out how to remove it. I took the LH threaded nut off but the keyed pulley is on there.
Heat it up and give it a wack?
I can't put a puller on the thin webbing.
Thanks for your ideas.
Jeff

 

[DavidR8]

How much runout is there Jeff?

 

[Janderso]

I haven't measured it but I would say >.030" side to side. It's pretty noticeable.
The upper wheel is straight.

 

[brino]

First, are you sure it's the pulley and not the axle?
Aluminum or cast iron wheels?
Is there enough meat on the pulley to just machine some off and still have it wide enough?

If so, could it be machined while still in place? Maybe clamp an angle grinder near it and have the pulley spin against it?
You would need a little adjustment of the grinder for feeding it in.

-brino

 

[Janderso]

Maybe clamp an angle grinder near it and have the pulley spin against it?
You would need a little adjustment of the grinder for feeding it in.

Interesting. My lathe is big enough.

By cleaning up the outside, it' s not going to stop the side to side movement of the blade in the center of the wheel

It's aluminum.
Axle? I hope not. I'll check.

 

[Ulma Doctor]

dumb question, is there deflection in the lower wheel?
in other words, can you grab the wheel and rock it side to side like you would to check a front wheel bearing on a vehicle.
any more than .003" static deflection is bad

 

[Janderso]

Mike,
There is no movement in those bearings that I can pick up.

I’m going to run it with the new tires, upper bearings, belts and blade too see where I am on the vibration issue.

Question, what/how do you lock the sliding shaft in position?
The outer Knob is secured to the inner sliding shaft, it easily moves in and out.
There has to be a way of locking it in Or out.
Seems like a perfect place for a ball detent.

 

[Ulma Doctor]

the shaft looked like it had provision for a set screw, but a detent would be a better arrangement

 

[Janderso]

180 degrees from the groove there is a hole in the hub. Not threaded.
I could put a spring between the knob and the pulley when in low gear.
But surely Delta has a way of securely locking in the two positions.

 

[Ulma Doctor]

they may have thought that friction was enough to keep the dogs locked