04-10-2016, 09:49 AM
The accuracy of one style over the other is not a factor in most cases. Only when you have fitted a very good DRO that stores tool positions and you need to depend upon those for repetitive parts is it an issue. I have never trusted a manual lathe to repeat to zero (Hardinge HLV and chuckers excepted) but then I don't find myself making more than one of anything very often. Even if I did and trusted the machine AND the DRO to repeat, I'm still a guy who with stop the machine and measure.
You have to be doing some really demanding work to find the differences between wedge and piston types, or the tool post itself (regardless of design) is just of such poor quality it won't ever work well. The one Arvid shows sure looks like a good quality one and may just need a good tear-down, lube and rebuild to get the two pistons retracting to the same point.
You have to be doing some really demanding work to find the differences between wedge and piston types, or the tool post itself (regardless of design) is just of such poor quality it won't ever work well. The one Arvid shows sure looks like a good quality one and may just need a good tear-down, lube and rebuild to get the two pistons retracting to the same point.