On Fri, 21 Nov 2014 16:29:06 -0700, "Bob La Londe"
wrote:


"Ned Simmons" wrote in message
.. .
On Fri, 21 Nov 2014 15:33:29 -0700, "Bob La Londe"
wrote:



That would be a great idea for a saw, but I want the claimed precision (or
atleast close) of the SawStop leaves in particular as these are part of
metal cutting machine build. If it works, and the leaves are consistent
I'll probably build a couple more. I'll want parts I can buy
consistently,
so I can service the machines easily.


The .0001 flatness spec is either a typo or creative marketing (flat
within .0001 per inch perhaps?). As a point of comparison, a lab grade
surface plate is only slightly better, and a grade A is less flat.

I figure if I can lay the edge of one on the flat of the other and not slide
a .002 feeler gage or shim stock under it anywhere I'll be more than able to
build the machine to do what I want. If I can, atleast I'll have some cast
iron to start with. Used pieces whether from a dealer or from Ebay would
certainly not have any means of assuring any level of consistency. I should
have known better than to assume nobody on this group would look up the
piece of material. LOL.

These folks can do .001/foot for reasonable money in either stress
relieved steel or cast iron.
http://www.americangrinding.com/

I recently had 6 cast iron plates about 12 x 18 x 1.25 ground flat on
both sides to .001/foot. Cost was less than $200 each, including
material.

I don't get it. Its like I am in a black hole for materials here. I can't
get any materials locally for a reasonable price, and freight kills on most.
For the aluminum pieces I use to cut molds I can get them shipped from the
other side of the country pre-cut to rough dimension cheaper than I can buy
them locally or even on the west coast. My regular east coast vendor even
always cuts long on the length dimension knowing I cut down to a particular
size. I can't even get drops locally for the same price.


I purchased the cast iron from Dura-Bar, American Grinding picked it
up, finished it, then shipped it from Chicago to my customer here in
Maine. $120/piece for the material + $50/pc for grinding. My customer
paid the freight on their account, but it was probably around $200.

Despite the distance, I've been doing business with American Grinding
for many years and have always been treated well. This was the first
time getting material from Dura-Bar and having it finished by American
Grinding, but it was also a positive experience.

By the way, the plates were slices cut off a 14x21 bar. They carry
bars up to 16x24.
http://www.dura-barms.com/resources/...le&pageid=4937

--
Ned Simmons