500mm pipe

No idea, closest you'll get is Line Pipe, which is designated by the OD, unlike conventional pipe.

Well drillers are a good source of offcuts.

Tom

Try Christmas Steel in Shrewsbury. 01743 462515. There were some pretty large pipes lying in their yard last time I passed.

Best wishes,

Chris

I'll call that number, this looks promising.

Many Thanks Chris

Further to the same project I am looking to have made, or to make a large sprocket to go around the outside drum (cylinder if you like) and wonder, can anyone helpo me with a supplier of such a big thing, or should I resort to fabricating teeth and heat treating them for hardness afterwards?

Thanks in advance.

How about wrapping and fixing motorcycle chain round the cylinder, and drive that from a sprocket....

Joules

I hadn't seen Nick Muller's reply till I scrolled down to the next thread.... I guess insane minds think alike.

my fault for double posting.

Now I wonder...

Who is the most insane? The one giving the advice, or the one who follows it??

__

Billy H

Is this an arcemedian screw you are building ?

What about a starter ring gear? iirc mini ones are about 500 mm.

Dave