Friction Screw press rebuild?

[nuge]

I am looking at a Z & H #8. I am unable to inspect in person. I have some good photo's and an operational vid. Everything looks good except....

There's "a little play" where the horizontal wheel meets the screw. And a "loose wedge" in there. Seller has never had it apart and I'm not sure I can get him to pull it. Don't blame him, its large.

I know a bunch of y'all have these presses. Is this normal? What's the worst case rebuild scenario? Should I run away?


Thanks much.

[Grant]

You'll need to come up with a way to secure the flywheel 100% SOLID to the screw. When this thing hits, the screw stops and the flywheel wants to keep going. lot of force on that connection. Worst case, you'll have to remove the screw and flywheel and have the shaft built up, the flywheel bored and matching keyways put in. The mounting area should be a taper and there should be a nut on top to pull it down tight.

[nuge]

Thanks Grant. Pretty much same as my flypress, huh? Would the flywheel be cast iron and more likely to be damaged than the screw? Am I right in thinking if the screw mount has major damage the machine is toast?

[Grant]

Thanks Grant. Pretty much same as my flypress, huh? Would the flywheel be cast iron and more likely to be damaged than the screw? Am I right in thinking if the screw mount has major damage the machine is toast?

No. Pay attention young grasshopper. I outlined above how the most major repair would be done. You bore the flywheel till you get a decent clean-up then weld up the shaft/screw end enough so that it can be turned to fit.

[nuge]

Now I get it. My lady went out of town and left me in charge of my own box of wine.

Would the screw have to be heat treated after welding, machining?

[Stumptown Forge]

Make sure you do all this work and adjust your friction discs while they are still ground. I just went through my rebuild on my Oserwelder and lets just say everything that could be wrong.... With the forces delivered the machine work to get it all back to spec was pretty extensive. Remember like big hammers the main expense is not in purchasing but getting them running. good luck!

[nuge]

Thanks for the replies. I think I am going to hold off. Bummer, perfect size. I want a runner. If anyone has any leads...

[Grant]

"If you can't be with the one you love............love the one you're with!"

[Grant]

Give the seller this information, he might lower the price and it might not need as much work as above. I outlined "worst case" scenario. Real "runners" cost mote - pay me now or pay me later. There's no free lunch. Time is money - money talks - talk is cheap!

[nuge]

Make sure you do all this work and adjust your friction discs while they are still ground. I just went through my rebuild on my Oserwelder and lets just say everything that could be wrong.... With the forces delivered the machine work to get it all back to spec was pretty extensive. Remember like big hammers the main expense is not in purchasing but getting them running. good luck!

Care to give a breakdown of the overhaul? Still got this on the brain.



Gee Grant, those last two comments are about 180 degrees apart.