Tonk piano stool

[rs74]

Sapphire I just looked at the stool on e-bay.  I am going to try to contact the owner and see if they will give me a price.  You are like a bloodhound way to go. 

[rs74]

Wayward, I think the treads on the stool are a bit different than a pipe tread

[talesofthesevenseas]

Great idea to use a standard piping flange Wayward! I'm guessing the holes will probably be on a standard centerline. I think you can use a couple of pipe fittings and create an adapter of sorts for the center threads.

[rs74]

I guess I can always give it a try if all else fails.  Thanks for all the input folks but I am turning in for the night. Thanks again you have all been a big help. 

[fancypants]

As far as the busted flange goes , I don't think it's worth welding - it'll always be weak , since it's cast iron .

I'd look for another for a 'parts stool' .

If you must decide to have your cast iron flange welded , I'd suggest you have your metalworker fill it up with babbet mat'l , (after it's been welded back together) so as to lend some support to your assembly .

Most piano stools I've sat on have ACME threads for the seat .... is this so for yours , rs74 ?

[waywardangler]

The ACME threads would be for the center post threads that allow the seat to be raised up or down.  The flange would be threaded on differently and may be either right or left hand.  The flange needs to be taken off to find out what tpi they are.  A simple stock pipe flange may be all that is needed for this repair.