I presently own two articulated hollowing systems and am pleased with both. That said, someday I may decide to acquire a captive system, although I am not currently in the market for one. Thus this post is more for my own edification than it is to aid me with a purchasing decision – at least for now.
The two systems I would instinctively look at first are those sold by Lyle Jamieson and Steve Sinner and these are the two I’d like to compare here.
While Lyle’s system uses a traditional ‘D’ style boring bar, Steve’s merely has two bars welded next to each other to provide the anti-rotational resistance. It would appear that one would be just as effective at resisting rotation as the other. However, Steve’s design has an advantage as the boring bar has a smaller footprint. Thus it would seem that Steve’s rig allows for greater lateral travel of the boring bar before it reaches the stops at either end of the trap (assuming traps of equal length). In theory, this would mean less frequent re-positioning of the trap. To look at it another way, it seems that Mr. Sinner’s design requires a trap of lesser length to allow the same degree of travel of the boring bar.
I am wondering if these observations are valid and to what extent they effect daily use of the rig.