On Jul 22, 11:00 am, "George" wrote:
"dpb" wrote in ...
Toller wrote:
Grizzly has up graded their 17 and 19" extreme band saws by changing the
trunnions to cast iron, and raising the price $200. Are cast iron
trunnions really worth $200 (or 25%) more? The old saws actually weight
a couple pounds more.

Depends...

If the previous designs have been found to be too light and flexible,
surely.

Then there is the consideration that cast iron, as opposed to aluminum,
doesn't make a good abrasive like AlOx, preserving the contour and
clearance, thereby accuracy, for a longer time. Stamped metal isn't in the
same league, of course.

Cast iron is harder. It machines better. It's rich in graphite,
which helps moving parts move smoothly instead of sticking
and galling.