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.

"Toller" wrote in message
...
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.

Or course not, but there may have been other improvements, plus the cost of
raw material is skyrocketing so it was, perhaps, a good time to give an
overall increase.

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.

As Edwin points out, metal costs have increased dramatically over last
several years as well as transportation costs (it costs Griz to get
stuff here before the transportation to you) and so on.

It is also true there's far more to "value" than simply material costs.

--

"dpb" wrote in message ...
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.

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.

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


I recall hearing that another advantage is the extra weight/density of
cast iron, which gives the wheels more inertia, like flywheels.

On Jul 22, 1:47 pm, Gordon Airporte wrote:
Father Haskell wrote:
Cast iron is harder. It machines better. It's rich in graphite,
which helps moving parts move smoothly instead of sticking
and galling.

I recall hearing that another advantage is the extra weight/density of
cast iron, which gives the wheels more inertia, like flywheels.

Which dampens vibrations and helps machinery last longer.
Not sure why trunnions would need more inertia, though.