William, My burner uses a 1-1/4" pipe and my vent hole on the top is 2" and the drain vent is 1" and the leak around the lid, well, it's there! The furnace is...
21418
Ray Brandes
rvbrandes
Oct 1, 2002 10:39 am
Mario, My silicon carbide crucibles have a glass like glaze on them. This is what melts and sticks the pot to the plinth. Also, I use glass and borax for a...
21419
Ray Brandes
rvbrandes
Oct 1, 2002 10:44 am
Don, Only if the plinth is stuck to the bottom of the furnace or is extreamly heavy. On occasion our plinth will stick and come out with the crucible. When we...
21420
Ray Brandes
rvbrandes
Oct 1, 2002 11:00 am
John, ... FORGET the stream of hot steam. The real danger is an explosion that scatters molten metal all over the place. This is the reason to pre-heat the...
21421
Ray Brandes
rvbrandes
Oct 1, 2002 11:20 am
Rupert, I checked out your reciepe and it looks ok, but perhaps there is too much alcohol and not enough oil. However, if the sand is too sticky, I wouldn't ...
21422
Ray Brandes
rvbrandes
Oct 1, 2002 11:23 am
Jeff, I don't understand why the board needs tight holes (or any holes) for a split pattern. -Ray...
21423
Mario L Vitale
chippuller
Oct 1, 2002 12:18 pm
Ray, That makes even more sense to me! I guess you like those heavy plinths, huh. Thanks, Mario ... From: "Ray Brandes" <rvb@...> To:...
21424
William Johns
grimblewort
Oct 1, 2002 12:35 pm
My furnace cost me exactly zero. It is a coffee can furnace (see http://www.gizmology.net/furnace.htm ) consisting of two cans, one serving as a plenum. The...
21425
tigertwous
Oct 1, 2002 12:54 pm
Ray: Thanks for the info, I think I'm going to try some in the near future. Jack Fisher...
21426
tigertwous
Oct 1, 2002 2:03 pm
Well I've look at just about every foundry site, professional and hobby and have yet to come up with any really good burner designs to be used with natural gas...
21427
john grant
grantjoh2001
Oct 1, 2002 2:48 pm
... They are very expensive. You do not want to give away many samples of your work. John Grant...
21428
Feiertag, Frederick J
fjf5766
Oct 1, 2002 4:09 pm
Clint, There are a few factors to consider when it comes to casting steel. The temperature of molten steel is high enough that you need to contend with a ...
21429
keporter@...
mikester98118
Oct 1, 2002 4:43 pm
Fred As to common sense. You are utterly correct. Nevertheless, every mountain needs a flag planted on it. We can't have mountains getting uppity. After the ...
21430
Ray Brandes
rvbrandes
Oct 1, 2002 4:49 pm
Jack, Have you consulted your gas provider? I am using propane and my provider was most helpful. Perhaps your provider can do the same for you and your NG ...
21431
paul_probus
Oct 1, 2002 5:16 pm
Fred, All good points. By welding filter, how dark are we talking about? An Oxy-Acet. filter is fairly light (#3 - #5 Shade), while I have a #10 Shade welding...
21432
WDSmith
wdsmith41
Oct 1, 2002 5:18 pm
As I clumsily tried to point out in an earlier post.... It is the quick, easy, simple stuff that usually gets you. Be afraid. Be very afraid. wds ... From:...
21433
Clint D
driggars
Oct 1, 2002 5:49 pm
Fred I will wait on the high temp. steels till I build the proper furnace for it, I have only melted Brass with my two furnaces. The CI I may try sometime ...
21434
Clint D
driggars
Oct 1, 2002 5:56 pm
I appreciate all the safety advice when I ask a question, but that does not answer my question. Sometimes we can be made to look stupid when a question is...
21435
paul_probus
Oct 1, 2002 6:18 pm
... does not ... about ... safety ... idiot and ... learn ... Clint, I think the problem is that noone on this list has ever cast steel (at least not...
21436
Jerry Kimberlin
jkimberln
Oct 1, 2002 6:53 pm
... I guess I didn't answer about steel because I've forgotten. We melted steel in induction furnaces with heats of about 500 and 1000 lbs per shot. Those...
21437
WDSmith
wdsmith41
Oct 1, 2002 6:58 pm
Clint is exactly on target but I feel compelled to expand on this one since it is a "personal thing." Why? Well, for all the usual reasons, BUT, as a printer...
21438
WDSmith
wdsmith41
Oct 1, 2002 7:07 pm
Me either. wds ... From: "gassercoupe" <gassercoupe@...> To: <hobbicast@yahoogroups.com> Sent: Monday, September 30, 2002 10:16 PM Subject: Re: Low cost...
21439
Raymond Heckert
samnjanet
Oct 1, 2002 7:18 pm
When I was just a puppy (1968), I worked in a foundry, and they made cores from molasses and fine ground corn flour (they also used Sodium-Silicate/CO2, but...
21440
Clint D
driggars
Oct 1, 2002 7:31 pm
Paul Thanks, I hope to sometime in the future build a furnace capable of casting steel, that will be sometimes off however, it is looking to be quiet a ...
21441
Clint D
driggars
Oct 1, 2002 7:35 pm
JerryK Thanks, this is some good info, I know what you mean about the drop distance for aluminum, I have ruined good molds due to that very same thing....
21442
Ken Stuempges
ozarks_hermit
Oct 1, 2002 10:21 pm
For those using pyrometers, H.F. has their digital multimeter (including temperature probe input) on sale for $19.99 (normally $39.99) Reads -20 to 1000 deg C...
21443
Keith Green
dart70ca
Oct 2, 2002 12:07 am
I believe this has been touched on before, though probably not in depth. I think the reason there aren't a lot of NG burner designs is the problem of supply....
21444
Jerry Kimberlin
jkimberln
Oct 2, 2002 12:30 am
... I'm sure you are correct Keith. Around here I am told the street pipe pressure is high. But by the time it gets through the limit valve and the gas meter...
21445
Rupert Wenig
rwenig1
Oct 2, 2002 12:34 am
Hello Ray, I think Al has a formula on his web page at http://www.telusplanet.net/public/a_schoep/home.htm . Or, check for his link in the web links at the...
21446
Rupert Wenig
rwenig1
Oct 2, 2002 12:34 am
Hello Fred, I added some black pipe fittings to the last cast iron melt I did. I assumed that they were cast iron but soon found out that they were a different...
