Hi everyone. I’m building a table that will eventually accomodate Fireball 19mm metric tooling. The table will be a 50mm grid pattern. It will have a special adjustable ribbing on the underside, and to properly design it, I would like to know, when you insert a 19mm tacking bolt and expand it, what’s the total clearance, including the external diameter of the circumference that is tangent to the bearings. In other words: I need to avoid the bearings touching the ribbing.
If anyone has a 2D drawing of a loose bolt, and a drawing of a clamped bolt when tightened, with measurements, I’d be quite happy.
Thanks a lot. Also have I understood correctly, that a 19mm bolt tacks two 25mm pieces together? So I should either use a 25mm plate, or a 12mm, 16mm, 19mm plate with spacers on the bolts.
From what I understand, the FB Tacking Bolt length changed after they added the Tacking Bolt Spacer. The best way to be sure is to check the CAD files on the FB store site
Thanks Wyatt - So to be clear, the bolt sticks 25mm (probably less, for tolerance) from under the table, and it occupies, when seen from above, a diameter of about 25mm (probably less here also). Got it.
When I’m done with my table I’ll show it to you all. It’s a fresh concept of welding table that goes big on ergonomics and modularity.
the 25mm gives room to insert the tooling expand the locking balls and use the full range of the tacking bolt if you want to use a weird thickness fixture. I added on some additional clearance just to be safe you could maybe get away with 20mm but having some extra room helps.