Shopsmith Forums

rcplaneguy wrote:Is there another source for 1" outside diameter tubes, at local big box stores, etc?

Yes, though it is slightly smaller in diameter. You can use 1" EMT typically available anywhere that sells plumbing and electrical supplies. I bought what I have at ACE. If you are planning to use this in lieu of extension tubes, the difference in diameter is negligible.

dusty wrote:Mark V table alignment takes time but it is a simple task. When I need to do mine, I do it on the work bench. Doing it this way, the table tops are always in the same plane and my only task is to install/align the rails.

The gap between the bench tube and the lower surface of the rails (on mine) measures .356". I had a piece of hard wood cut for this purpose but it is now hiding somewhere (probably in the shop on my other work bench).

Only after I have completed this alignment do I remount the tables on the Mark V. It is then that I align the extension table to the Main Table.

If you have only one extension table, align it to the side of the Main Table that you are most likely to have it mounted. Once aligned there, it may not be aligned to the other side.

Dusty,

To be sure I'm understanding what you're doing... You are aligning the connecting tubes to the tables with this method.?.?

I see someone on eBay sells a pair of long tubes. I wonder if these are any better than the EMT tube you mention.

Thanks, Roy

roy_okc wrote:Dusty,

To be sure I'm understanding what you're doing... You are aligning the connecting tubes to the tables with this method.?.?

I see someone on eBay sells a pair of long tubes. I wonder if these are any better than the EMT tube you mention.

Thanks, Roy

The real objective is to have the table top(s) all in the same plane when the tables are all tied together using the extension tubes.

With the tables in a common plane, the procedure attempts to align the table rails so that they align properly with the rails on the adjacent tables. This is done by inserting and securing the tubes into the rails and then securing the rails to the tables all the same distance above the bench top.

I have a pair of the 5' tubes that are offered on eBay. They are heavier, shiny and straight and they work.

EMT may not be as straight, is definitely not shiny and is not as stout but it works.

I have abandoned the idea that the extension tubes need to be "straight as an arrow" to be fully functional.