I have acquired an 18x24x4 inch granite surface plate. Next step is to make
a stand. I found the placement of the support pads in Guy Lutard's The
Machinist's Third Bedside Reader, but he doesn't say anything about the
size of the support pads. I am thinking about using three nylon chairleg
glides mounted on the ehd of 1/4" bolts. I have some 3/4" diameter glides.
Are they big enough?
--
Keith Bowers - Thomasville, NC

keith bowers wrote:

I have acquired an 18x24x4 inch granite surface plate. Next step is to make
a stand. I found the placement of the support pads in Guy Lutard's The
Machinist's Third Bedside Reader, but he doesn't say anything about the
size of the support pads. I am thinking about using three nylon chairleg
glides mounted on the ehd of 1/4" bolts. I have some 3/4" diameter glides.
Are they big enough?

The pads under my 18x24 are 1.5" dia and 1/2" thick and look like hard rubber.
There are two pads next to each other at the one support position, like an 8
with the long axis of the 8 parallel to the 18" dimension. It's on a bench
(a v_e_r_y sturdy bench) and I don't know how this info would translate to a
stand. I'd use something larger than 3/4", but I tend to overdesign a bit.

Tove

keith bowers wrote:

I have acquired an 18x24x4 inch granite surface plate. Next step is to make
a stand. I found the placement of the support pads in Guy Lutard's The
Machinist's Third Bedside Reader, but he doesn't say anything about the
size of the support pads. I am thinking about using three nylon chairleg
glides mounted on the ehd of 1/4" bolts. I have some 3/4" diameter glides.
Are they big enough?

Does your surface plate stand have pads mounted on its lower side?

Anyway, I built a surface plate stand for mine, same size as yours, and I have
liked it for many years. I used those cubicle wall support feet, probably about
the same as yours, also I believe on 1/4-20 or 5/16-18 threads. See my stand
tacked together but not yet welded:

http://www.tinyisland.com/images/splate2.jpg

GWE

On Tue, 10 Jan 2006 21:14:32 -0500, keith bowers
wrote:

I have acquired an 18x24x4 inch granite surface plate. Next step is to make
a stand. I found the placement of the support pads in Guy Lutard's The
Machinist's Third Bedside Reader, but he doesn't say anything about the
size of the support pads. I am thinking about using three nylon chairleg
glides mounted on the ehd of 1/4" bolts. I have some 3/4" diameter glides.
Are they big enough?

Yes..but....it will slide like crazy on nylon, and 18x24 will slowly
flatten them out.

My big 36x52, is on 3 leather "hockey pucks". You need something
non-slippery, and non compressable. Got a pair of old boots or thick
soled shoes you dont want anymore..cut em out of the sole . They only
need to be 1" or i diameter or on a side, for your plate. 2" would be
swell.

Gunner

The aim of untold millions is to be free to do exactly as they choose
and for someone else to pay when things go wrong.

In the past few decades, a peculiar and distinctive psychology
has emerged in England. Gone are the civility, sturdy independence,
and admirable stoicism that carried the English through the war years
.. It has been replaced by a constant whine of excuses, complaints,
and special pleading. The collapse of the British character has been
as swift and complete as the collapse of British power.

Theodore Dalrymple,

keith bowers wrote:

I have acquired an 18x24x4 inch granite surface plate. Next step is to make
a stand. I found the placement of the support pads in Guy Lutard's The
Machinist's Third Bedside Reader, but he doesn't say anything about the
size of the support pads. I am thinking about using three nylon chairleg
glides mounted on the ehd of 1/4" bolts. I have some 3/4" diameter glides.
Are they big enough?


Chair legs? Umm, can they handle the weight? Probably, but be careful, you
don't want a 250 Lb. chuck of granite leaping about your shop!

I did a 24 x 36 x 4" plate, weighing 375 Lbs. I used 3 1" diameter
pieces of stock
with a 1" - 20 TPI adjusting screw on one end, and a 1" ball on the
other. These
ball joints fit into some 2.5" dia sockets, flat on the other side.

Jon

VERY nice looking project, Grant.
Bill

In my Metrology Handbook they have a picture of a stand made from Tube steel
and use three.

Should be a tripod in shape. Standards exist if you don't have them - dimensions -
I think I saw you did.

I think the dual created a pivot line and two points. That might be a problem.

Martin
Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder



Tove Momerathsson wrote:
keith bowers wrote:

I have acquired an 18x24x4 inch granite surface plate. Next step is to make
a stand. I found the placement of the support pads in Guy Lutard's The
Machinist's Third Bedside Reader, but he doesn't say anything about the
size of the support pads. I am thinking about using three nylon chairleg
glides mounted on the ehd of 1/4" bolts. I have some 3/4" diameter glides.
Are they big enough?


The pads under my 18x24 are 1.5" dia and 1/2" thick and look like hard rubber.
There are two pads next to each other at the one support position, like an 8
with the long axis of the 8 parallel to the 18" dimension. It's on a bench
(a v_e_r_y sturdy bench) and I don't know how this info would translate to a
stand. I'd use something larger than 3/4", but I tend to overdesign a bit.

Tove

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