Subject: FS: welders

From: [email-masked] (Dave Shepard)
Date: 26 Jan 1996 16:29:18 GMT

Couple of heavy duty welders for sale:

Lincoln R3S400, uses 3-phase power : $1100
Airco wirefeed for above : $450

ESOP welder (made in Sweden, sold in US by National Cylinder)
    uses 3-phase power, 300 amp, push-pull gun : $1200

All items are located in Pittsburgh, PA.  The shipping weight
of the Lincoln is probably around 650 lbs.  The ESOP is 
around 350 lbs.  Prices do not include shipping and are firm.
Hey, these are darn good deals at the asking prices.

Send mail to [email-masked]
Include your phone number if you want to discuss specifics and
would prefer to do it over the phone.

Cheers,
--Dave

>The contents of this note do not necessarily reflect the opinions
>or interests of Digital Equipment Corporation.

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From: [email-masked] (Jens)
Date: Sat, 27 Jan 1996 23:37:00 GMT

Thanks for the input. I am getting somewhat confused about the
thickness issue by now. I had one reply recommending 0.001", one
recommending 0.01 and this one at 0.004. My personal thought (and I
stress the word 'thought') is that 0.001 is too thin so I leaned
towards the 0.01 figure but 0.004 seems ok too. What different
characteristics would different thicknesses have. Why would I want a
particular thickness (0.001, 0.004 or 0.01) ?
Any and all thougts appreciated.
Also, in regards to the adhesion problem I had, the paint shop feels
that possibly the cleaning and pre-treatment chemicals were not
working properly so they are bringing in the chemical distributor to
look at things. Does this seem like a reasonable assumption assuming
that the de-greaser bath works ok and no oils are left on the steel ?
My original thought was that maybe they are handling the product with
bare hands so that you get a re-deposition of oil but I am now told
that this is not a problem as long as the product is wet. (Don't ask
me why wet versus dry should make any difference). 
Any thoughts ?????

>My business uses powder coating that is done by outside painting
>businesses.  The thickness that we demand is about 0.004".

---

From: [email-masked]
Date: Sat, 27 Jan 1996 19:15:14 GMT

[email-masked] (Jens) wrote:

>Anybody have any idea what normal coating thickness is for epoxy
>powder coat ?

My business uses powder coating that is done by outside painting
businesses.  The thickness that we demand is about 0.004".  I have
moved my business from one vendor who was unresponsive about coating
thickness and overspray.  

My new vendor is much more careful about the application.  Perhaps he
is just more skillful.  But even with the new vendor, we get an
occasional part that is coated too heavily and another part that is
coated to lightly.  I believe that this is going to be the norm for
any hand application of powder paint.  

There are mechanized procedures that will provide a very consistant
application, but such a system requires considerable setup for your
parts, and is generally used for high volume commercial applications
such as door lockset clear coating. (Millions of units)

What I can recommend is to talk to your vendor.  I built special
painting fixtures that protect areas where paint buildup is a
particular problem.  The fixtures are used several times, and then the
paint buildup is removed chemically or by burning the coating off.  

J. M. Stuart

Engineer / Inventor / Patentee

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From: [email-masked]
Date: Sat, 27 Jan 1996 19:22:23 GMT

[email-masked] (Dave Shepard) wrote:

>    uses 3-phase power, 300 amp, push-pull gun : $1200

Is the name ESOP or is it ESAB.  I have used the latter.

---

From: [email-masked] (Peter Drumm)
Date: 29 Jan 1996 02:16:48 GMT

In message <[email-masked]> - [email-masked] (Jens) wr
ites:
:>
:>Thanks for the input. I am getting somewhat confused about the
:>thickness issue by now. I had one reply recommending 0.001", one
:>recommending 0.01 and this one at 0.004. My personal thought (and I
:>stress the word 'thought') is that 0.001 is too thin so I leaned
:>towards the 0.01 figure but 0.004 seems ok too. What different
:>characteristics would different thicknesses have. Why would I want a
:>particular thickness (0.001, 0.004 or 0.01) ?
:>Any and all thougts appreciated.
:>Also, in regards to the adhesion problem I had, the paint shop feels
:>that possibly the cleaning and pre-treatment chemicals were not
:>working properly so they are bringing in the chemical distributor to
:>look at things. Does this seem like a reasonable assumption assuming
:>that the de-greaser bath works ok and no oils are left on the steel ?
:>My original thought was that maybe they are handling the product with
:>bare hands so that you get a re-deposition of oil but I am now told
:>that this is not a problem as long as the product is wet. (Don't ask
:>me why wet versus dry should make any difference). 
:>Any thoughts ?????
:>

The powder coater in my area usually deposits .009-.010 of coating(after 
curing). This has worked out well, the only minor problem being that any 
reamed/threaded holes have to be cleaned out afterwards, so that means 
running a reamer or tap thtu each one. They also prefer to have pieces 
sandblasted before they're brought in, it really helps adhesion.

All opinions are my own, even if they are wrong!
[email-masked]
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