ID Workholding on a Horizontal

[Ecmdrw5]

I'm looking for a way to hold a 4.15 ID that is 7inches in lenth. I want to clamp onto 4inches of the ID. So far I found a ATS chuck for a lathe with an ID collet that will work but then I'd have to find a way to make an actuator to operate the vise. I've looked to Mitee Bite and their's aren't tall enough. Jergen's don't go big enough in diameter. I've thought about just using a 3 jaw chuck with some pie jaws but I really want the expanding mandrel effect with the jaws being forced open by a tapered screw so I get good contact across the whole length of the mandrel. Any ideas?

[txcncman]

Why don't you build you own mandrel? At that diameter, you do not need a tapered screw. Make a cone to fit the taper machined into the mandrel.

[mtadirect]

Refer to the link expanding mandrel. The product is came from UK. you can google PTG work holding. They provides custom made expanding mandrel service. The link is to mine web, sorry.

[uli12us]

Why don't you make special Jaws for a lathe chuck. With 4," ID that should be no problem.

[dak1]

Dunham Tool Company - collets, chucks, spindles, lathes, mandrels