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Black Oxide "how to"?? in a small scale
I need to coat steel parts (small) with a black oxide coating but in small
lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman |
Black Oxide "how to"?? in a small scale
You might look at:
http://www.eastwoodco.com/itemdy00.a...113+Z&Dep_Key1 They sell the replacement solution also, $11 makes 4 pints, but I have no idea how far that will go on your parts: http://www.eastwoodco.com/itemdy00.a...ion&Dep_ Key1 David "Pedroman" wrote in message news:qpCOb.79343$Rc4.283698@attbi_s54... I need to coat steel parts (small) with a black oxide coating but in small lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman |
Black Oxide "how to"?? in a small scale
"Pedroman" wrote:
I need to coat steel parts (small) with a black oxide coating but in small lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman One method that I have used with some success is a pot of hot Sodium Thiosulfate, more commonly known as Photographic Hypo. Make sure that the parts are thoroughly clean and dip them in a solution of hot water and hypo. It depends upon the material that you are coating. This can produce anything from a crummy brownish smudge to a fairly attractive bluing to a rich black coat. For a more fool proof (and more expensive) solution get some of this stuff: http://www.eastwoodco.com/itemdy00.asp?T1=10113+Z&I1.x=40&I1.y=38 From Eastwood. The advantages are that this is a cold process and the chemicals can sit on the shelf almost indefinitely. If there is a disadvantage it's the fact that as the stuff comes to the end of its life, it leaves a splotchy coating that is a PITA to correct. George. |
Black Oxide "how to"?? in a small scale
Kit ... http://www.eastwoodco.com/itemdy00.a...1.x=40&I1.y=38 .... and all its components are no longer aailable. |
Black Oxide "how to"?? in a small scale
In article , Peter H. says...
Kit ... http://www.eastwoodco.com/itemdy00.a...1.x=40&I1.y=38 ... and all its components are no longer aailable. The oxpho black cold bluing compound is available from brownells. Applied properly it winds up coal black and reasonably durable. It's not as durable as a hot process, but it's very easy to do. Jim ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
Black Oxide "how to"?? in a small scale
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Black Oxide "how to"?? in a small scale
I have blued many gun parts with Brownells hot bluing salts in a 50 cal ammo
can on top of a old kitchen stove, It is messy and hazardous, but does a fine job. I do not think I'd try to use a fryer because the temp is critical and 290 degree caustic eats aluminum bigtime, and stainless gives off color spots on the parts is used with hot caustic salts |
Black Oxide "how to"?? in a small scale
I do my own hot black oxide. It is such a pain in the butt, that I save up
my projects and once a year do them all. I use 2 parts lye, 1 part sodium nitrate and 2 parts water by Vol. It gets heated to around 300f. I use two turkey friers. One with just a lye solution on the boil and one with the bluing salts. Pieces are first rinsed in paint thinner and dried. Then they are boiled in the lye for about 5-10 min and then into the salts for 5-10 min . Then they are rinsed in a bucket of water and dipped in a bucket of oil. It's a royal pain, but it is one tough finish. Paul K. Dickman jim rozen wrote in message ... In article , Peter H. says... Kit ... http://www.eastwoodco.com/itemdy00.a...1.x=40&I1.y=38 ... and all its components are no longer aailable. The oxpho black cold bluing compound is available from brownells. Applied properly it winds up coal black and reasonably durable. It's not as durable as a hot process, but it's very easy to do. Jim ================================================= = please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================= = |
Black Oxide "how to"?? in a small scale
I posted the sodium theosulphate method here many years ago. The full
instructions may still be in the FAQ. Make sure the items to be blackened are fully degreased. Steve R. "George" wrote in message ... "Pedroman" wrote: I need to coat steel parts (small) with a black oxide coating but in small lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman One method that I have used with some success is a pot of hot Sodium Thiosulfate, more commonly known as Photographic Hypo. Make sure that the parts are thoroughly clean and dip them in a solution of hot water and hypo. It depends upon the material that you are coating. This can produce anything from a crummy brownish smudge to a fairly attractive bluing to a rich black coat. For a more fool proof (and more expensive) solution get some of this stuff: http://www.eastwoodco.com/itemdy00.asp?T1=10113+Z&I1.x=40&I1.y=38 From Eastwood. The advantages are that this is a cold process and the chemicals can sit on the shelf almost indefinitely. If there is a disadvantage it's the fact that as the stuff comes to the end of its life, it leaves a splotchy coating that is a PITA to correct. George. |
Black Oxide "how to"?? in a small scale
"Pedroman" wrote in message news:qpCOb.79343$Rc4.283698@attbi_s54... I need to coat steel parts (small) with a black oxide coating but in small lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman Found you a link. http://www.birchwoodcasey.com/index_a.html Harold |
Black Oxide "how to"?? in a small scale
On Sun, 18 Jan 2004 22:40:13 -0800, Harold & Susan Vordos wrote:
"Pedroman" wrote in message news:qpCOb.79343$Rc4.283698@attbi_s54... I need to coat steel parts (small) with a black oxide coating but in small lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman Found you a link. http://www.birchwoodcasey.com/index_a.html Harold A much less expensive alternative would be Caswell's cold black oxiding kit. They claim that their 1.25 gallon kit will do 600 to 1200 sq. ft. of surface. Pedroman says he has a max of 3.5 * .75 * 500 / 12 = 110 sq. ft. per month, so the 1.25 gallon kit would give him a 5 month supply, minimum. The cost is $35 for the kit. The down side is that I've read that the cold black oxide method isn't as good (reliable, consistent, durable) as the hot method. Not having tried it myself I don't know. The link is: http://www.caswellplating.com/kits/black.htm -- "There cannot possibly be a god in heaven watching all of this calmly." -- Revi Shankar ----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =--- |
Black Oxide "how to"?? in a small scale
For professional hot black oxide (bluing) equip. go to www.brownells.com .
They sell everything you need and the instruction manual is free. The bluing salts tank must be carbon steel. The process emits large volumes of corrosive vapor, so must be done outside or in a well-ventilated room, separate from your shop. High quality personal protection equip. is suggested since you will be dealing with a 300° F caustic solution. Randy "Pedroman" wrote in message news:qpCOb.79343$Rc4.283698@attbi_s54... I need to coat steel parts (small) with a black oxide coating but in small lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman |
Black Oxide "how to"?? in a small scale
See www.caswellplating.com, I use their Black Oxide Kit.
Here are results: http://www.ebiz2000.com/hsm/Machining_toolholders.jpg http://www.ebiz2000.com/hsm/blackening_toolholders.jpg http://www.ebiz2000.com/hsm/finished_toolholders.jpg "Pedroman" wrote in message news:qpCOb.79343$Rc4.283698@attbi_s54... I need to coat steel parts (small) with a black oxide coating but in small lots. Parts are 3 1/2" X .75" and are basicly steel stock with drilled holes for alignment pins. Anyone have a small shop style setup that could share info on the process. I'm currently having someone else do it but at $50 minimum I have to build a lot more than I use in a couple of months to make it worthwhile. Sometimes I go through 100 in a month and sometimes 500 it just depends. Stocking 1000s of this item is not really worth it unless that's the only route I can find. A friend commented that a used commercial french frier would be about the size I would need and it certainly can generate the heat required. I've checked around and those things are cheap to find. Anyone? Pedroman |
Black Oxide "how to"?? in a small scale
Interesting use of Sherline accessories on larger shop tools!
"Spencer" wrote in message om... See www.caswellplating.com, I use their Black Oxide Kit. Here are results: http://www.ebiz2000.com/hsm/Machining_toolholders.jpg http://www.ebiz2000.com/hsm/blackening_toolholders.jpg http://www.ebiz2000.com/hsm/finished_toolholders.jpg snip |
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