Can anyone point me in the direction of a local machinest who would be able to turn an adapter for me for a reasonable price (~$30) - I have one drawn up in SolidWorks for my GP-DX mount. I purchased an adapter from Universal Astronomics but it doesn't fit the tripod I have. My new bit "adapts the adapter" and is would be fixed to the tripod base. Cheers David
David- I'm an amateur machinist, and would be glad to turn it for you. Since I'm out of work, I've now got more time than income. Give me a call. I live in East Mill Creek, near Olympus cove. Bob Grant 273-0369 ----- Original Message ----- From: "Naz_David" <naz_david@msn.com> To: <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 7:55 AM Subject: [Utah-astronomy] Surveyor Tripod Adapter Can anyone point me in the direction of a local machinest who would be able to turn an adapter for me for a reasonable price (~$30) - I have one drawn up in SolidWorks for my GP-DX mount. I purchased an adapter from Universal Astronomics but it doesn't fit the tripod I have. My new bit "adapts the adapter" and is would be fixed to the tripod base. Cheers David _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.utahastronomy.com
Bob, I'm wondering, do you ever cut steel? I know that is a dangerous proposition because steel has some nasty pickling stuff in it. But what's your take on that? Thanks, Joe
Joe, I turn and cut steel for a living. What kind of nasty stuff you talking about? Guy Quoting Joe Bauman <bau@desnews.com>:
Bob, I'm wondering, do you ever cut steel? I know that is a dangerous proposition because steel has some nasty pickling stuff in it. But what's your take on that? Thanks, Joe
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Joe- Can you direct me to a source detailing more specific hazards of machining steel? Yes, I do cut steel, and you probably have too, if you've ever used a hack saw. I'm certainly no expert on this topic, but by expressing my thoughts, maybe we can get input from others. My dad died from asbestos inhalation dating back to the aftermath of the Pearl Harbor attack, and in a sense became a victim of the attack (through corporate negligence of the known hazards) 50 years after the fact. I'd like to know of any hazards that I might be exposing myself to, so, y'all, please speak up. I think that steel is one of the more benign materials to work with. (Coolants and cutting fluids present their own hazards.) I have never heard of any dangers from the components of steel due to machining it, and I have just spent 9 years selling cutting tools to manufacturers and machine shops. I'd like to know more about what you are referring to. Some of the alloying elements in steel might be hazardous in the elemental states, but the worst of these (in commonly available steel) that I can think of off the top of my head are lead, sulfur and phosphorus. Sulfur, and I think lead, were considered safe enough to have come in my childhood chemistry set. These are locked in the crystalline matrix of the steel, probably aren't released in the machining process, and typically make up only .05 to .30 percent of the steel. Steels are dipped into nasty pickling stuff for either heat treating or metal plating operations. The plating plants that I have visited were noxious! Plating is usually done after a part is machined, so cutting plated steel is not very common in manufacturing. It is common for field operations or repair work, such as plumbers cutting threads in galvanized pipe. But at this point, only the metallic plating is present, and not the chemicals used to apply it. I know that welding plated steels can produce toxic gases. Galvanized steel is very common, and a steel that I know not to weld for safety reasons, but I have never heard that it is unsafe to machine. Outside of steel, I have heard that some more exotic bronzes are hazardous to machine, but I believe that this is due to an inhalation problem with the dust it produces. I see a lot more risk with dust producing materials like wood and fiberglass than I do with steel, which forms an elongated, continuous chip in most cases. Cast iron sometimes forms a dust-like chip when it is machined, as would steel on a grinder or sander, so these are cases where breathing protection may be warranted. However, these heavier materials drop out of the air faster than something like wood or fiberglass. Magnesium and titanium can catch fire when being machined, and these fires are difficult to put out. I've heard that machining mag wheels can get exciting real fast, and I've talked to customers who have had titanium fires, but these are pretty rare. I machined my eyepieces from titanium without the least worry of conflagration. I've visited the MagCorp plant west of the Great Salt Lake several times. The chemicals present in their process are so hazardous (chlorine, I believe) that I got turned away at the gate on my first visit because I was wearing contact lenses. You have to keep a respirator on your body the whole time you are on site, but magnesium itself is as safe to touch as aluminum. The tungsten carbide cutting tools I sold came with a hazard label on the boxes, but this referred only to grinding the tungsten carbide, where dust could be a problem. No mention was made of any hazard when using these products for metal-cutting, for which they were intended. Bob Grant ----- Original Message ----- From: "Joe Bauman" <bau@desnews.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 5:30 PM Subject: Re: [Utah-astronomy] Surveyor Tripod Adapter
Bob, I'm wondering, do you ever cut steel? I know that is a dangerous proposition because steel has some nasty pickling stuff in it. But what's your take on that? Thanks, Joe
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Yikes, I hope I didn't just shoot off my mouth and say something stupid -- wouldn't be the first time. My impression is that cyanide is used in hardening steel and that it can be released by cutting it. Maybe I'm wrong. Or maybe it's not a significant hazard. I tried to get my tripod legs cut down a year or so ago and one of the places I went said there was a problem because of cyanide. I had already had that impression, too, but I'm not sure where I got it in the first place. Other than that I don't know much. Best wishes, Joe
Cyanide was once used in "case" hardening, and today on rare occasions, it is still used to color case harden firearms. You just have to excercize caution when handling most of today's materials. Wear nitrile gloves when possible and don't inhale the fumes. What kind of tripod did you have that you suspected that cyanide was used in it's manufacture? What did you end up doing? Guy Quoting Joe Bauman <bau@desnews.com>:
Yikes, I hope I didn't just shoot off my mouth and say something stupid -- wouldn't be the first time. My impression is that cyanide is used in hardening steel and that it can be released by cutting it. Maybe I'm wrong. Or maybe it's not a significant hazard. I tried to get my tripod legs cut down a year or so ago and one of the places I went said there was a problem because of cyanide. I had already had that impression, too, but I'm not sure where I got it in the first place. Other than that I don't know much. Best wishes, Joe
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You know, Guy, I really suspect the shop didn't want to bother with it. It's a regular big ugly Meade tripod and I located plans on the Internet that would allow one to cut it down, making it easier to lift the OTA onto the wedge. But I am ambivalent about whether I want to do that anyhow, now. I think my head would be on the ground if I were trying to take a picture of anything high above. Probably I was just wrong on fumes. Thanks, Joe
Well Joe, if you ever decide you want to do it let me know. It don't scare me. ;) Guy Quoting Joe Bauman <bau@desnews.com>:
You know, Guy, I really suspect the shop didn't want to bother with it. It's a regular big ugly Meade tripod and I located plans on the Internet that would allow one to cut it down, making it easier to lift the OTA onto the wedge. But I am ambivalent about whether I want to do that anyhow, now. I think my head would be on the ground if I were trying to take a picture of anything high above. Probably I was just wrong on fumes. Thanks, Joe
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Joe- The hardenability of steel can be increased by adding either carbon (carburizing) or nitrogen (nitriding), or both (carbo-nitriding). There are many ways of doing either of these. Cyanide offers both carbon and nitrogen. While some other materials might absorb the cyanide molecules, the iron in the steel bonds with the carbon and nitrogen atoms themselves, breaking up the cyanide molecules. Perhaps this is the source of their confusion. However, any shop that turns away business because of this misguided fear probably won't be in business very long. Bob ----- Original Message ----- From: "Joe Bauman" <bau@desnews.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 7:59 PM Subject: Re: OT Re: [Utah-astronomy] Surveyor Tripod Adapter
Yikes, I hope I didn't just shoot off my mouth and say something stupid -- wouldn't be the first time. My impression is that cyanide is used in hardening steel and that it can be released by cutting it. Maybe I'm wrong. Or maybe it's not a significant hazard. I tried to get my tripod legs cut down a year or so ago and one of the places I went said there was a problem because of cyanide. I had already had that impression, too, but I'm not sure where I got it in the first place. Other than that I don't know much. Best wishes, Joe
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Bob Grant wrote:
Can you direct me to a source detailing more specific hazards of machining steel?
With tongue firmly implanted in cheek I'll mention that my biggest difficulty with machining steel is the pain caused by the shavings (hundreds of sharp little nasty needles). Aluminum and plastic shavings are much more finger friendly... Patrick
Patrick- With rolling pin firmly implanted in cranium, my biggest difficult was my wife's reaction when I tracked chips into the house. Bob ----- Original Message ----- From: "Patrick Wiggins" <paw@trilobyte.net> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 8:19 PM Subject: [Utah-astronomy] Danger of steel
Bob Grant wrote:
Can you direct me to a source detailing more specific hazards of
machining
steel?
With tongue firmly implanted in cheek I'll mention that my biggest difficulty with machining steel is the pain caused by the shavings (hundreds of sharp little nasty needles).
Aluminum and plastic shavings are much more finger friendly...
Patrick
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Yesh, well aluminumum ish often made from recycled beer cans...hic, hic. So bee careful wish that stuff too. Barney ----- Original Message ----- From: "Patrick Wiggins" <paw@trilobyte.net> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 8:19 PM Subject: [Utah-astronomy] Danger of steel
Bob Grant wrote:
Can you direct me to a source detailing more specific hazards of machining steel?
With tongue firmly implanted in cheek I'll mention that my biggest difficulty with machining steel is the pain caused by the shavings (hundreds of sharp little nasty needles).
Aluminum and plastic shavings are much more finger friendly...
Patrick
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How do you know that Bishop? Quoting "Barney B." <aaah@sisna.com>:
Yesh, well aluminumum ish often made from recycled beer cans...hic, hic. So bee careful wish that stuff too.
Barney
----- Original Message ----- From: "Patrick Wiggins" <paw@trilobyte.net> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 8:19 PM Subject: [Utah-astronomy] Danger of steel
Bob Grant wrote:
Can you direct me to a source detailing more specific hazards of machining steel?
With tongue firmly implanted in cheek I'll mention that my biggest difficulty with machining steel is the pain caused by the shavings (hundreds of sharp little nasty needles).
Aluminum and plastic shavings are much more finger friendly...
Patrick
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Ish cuz I'm Bishop of the 5th ward. Ha! Get it? 5th ward. BB ----- Original Message ----- From: <ziggy943@xmission.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Monday, November 01, 2004 11:09 AM Subject: Re: [Utah-astronomy] Danger of steel
How do you know that Bishop?
Quoting "Barney B." <aaah@sisna.com>:
Yesh, well aluminumum ish often made from recycled beer cans...hic, hic. So bee careful wish that stuff too.
Barney
----- Original Message ----- From: "Patrick Wiggins" <paw@trilobyte.net> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 8:19 PM Subject: [Utah-astronomy] Danger of steel
Bob Grant wrote:
Can you direct me to a source detailing more specific hazards of machining steel?
With tongue firmly implanted in cheek I'll mention that my biggest difficulty with machining steel is the pain caused by the shavings (hundreds of sharp little nasty needles).
Aluminum and plastic shavings are much more finger friendly...
Patrick
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Don't be so modest, You're the stake president! Quoting Chuck Hards <chuckhards@yahoo.com>:
And I'm his first counselor, Jack Daniels!
--- "Barney B." <aaah@sisna.com> wrote:
Ish cuz I'm Bishop of the 5th ward. Ha! Get it? 5th ward.
BB
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I'm humbled and will do my best to live up to this calling! --- ziggy943@xmission.com wrote:
Don't be so modest, You're the stake president!
Quoting Chuck Hards <chuckhards@yahoo.com>:
And I'm his first counselor, Jack Daniels!
--- "Barney B." <aaah@sisna.com> wrote:
Ish cuz I'm Bishop of the 5th ward. Ha! Get it? 5th ward.
BB
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Never mind. I thought you said steak president. --- Chuck Hards <chuckhards@yahoo.com> wrote:
I'm humbled and will do my best to live up to this calling!
--- ziggy943@xmission.com wrote:
Don't be so modest, You're the stake president!
Quoting Chuck Hards <chuckhards@yahoo.com>:
And I'm his first counselor, Jack Daniels!
--- "Barney B." <aaah@sisna.com> wrote:
Ish cuz I'm Bishop of the 5th ward. Ha! Get it? 5th ward.
BB
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This guy takes "honesty in advertising" to a whole new high... or low... or... whatever... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5931579207&ssPageNam e=STRK:MEWA:IT Jo
$20 for all that stuff? I almost want to buy it just so I can say I got so many telescope parts for so little money... BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap? Patrick Josephine Grahn wrote:
This guy takes "honesty in advertising" to a whole new high... or low... or... whatever...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5931579207&ssPageNam e=STRK:MEWA:IT
Joo
Hay! The winter solstice party needs a good door prise. JG Patrick Wiggins <paw@trilobyte.net> wrote: $20 for all that stuff? I almost want to buy it just so I can say I got so many telescope parts for so little money... BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap? Patrick Josephine Grahn wrote:
This guy takes "honesty in advertising" to a whole new high... or low... or... whatever...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=5931579207&ssPageNam e=STRK:MEWA:IT
Joo
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I have been watching Jupiter and Venus close on each other. They get a little closer each morning. On Friday morning just before sun up they should appear about 2/3 degrees from each other. JG --------------------------------- Do you Yahoo!? Check out the new Yahoo! Front Page. www.yahoo.com/a
A piece that thick won't be cheap (maybe if it's radioactive...). Is this for a cell or endpiece? If most of the interior is to be machined away, perhaps a casting made from a pattern would be cheaper, and take less time on the lathe to finish...just a thought. --- Patrick Wiggins <paw@trilobyte.net> wrote:
BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap?
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Chuck, We need to adapt Patricks 8" lens to fit the Clark's 9" ring. Guy Quoting Chuck Hards <chuckhards@yahoo.com>:
A piece that thick won't be cheap (maybe if it's radioactive...).
Is this for a cell or endpiece? If most of the interior is to be machined away, perhaps a casting made from a pattern would be cheaper, and take less time on the lathe to finish...just a thought.
--- Patrick Wiggins <paw@trilobyte.net> wrote:
BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap?
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Then a casting is the obvious way to go. It doesn't have to be metal, either, composites would work fine, in fact better than metal for this application since thermal expansion wouldn't be an issue. (My 5" achromat was pinched in it's factory cell until I opened it up a tad, made a world of difference in performance.) What's wrong with Patricks existing tube assembly? --- diveboss@xmission.com wrote:
Chuck,
We need to adapt Patricks 8" lens to fit the Clark's 9" ring.
Guy
Quoting Chuck Hards <chuckhards@yahoo.com>:
A piece that thick won't be cheap (maybe if it's radioactive...).
Is this for a cell or endpiece? If most of the interior is to be machined away, perhaps a casting made from a pattern would be cheaper, and take less time on the lathe to finish...just a thought.
--- Patrick Wiggins <paw@trilobyte.net> wrote:
BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap?
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Nothing..it's beautiful, but it won't allow the exchange of the 8" Brandt lens and the 9" Clark lens. We decided that might be a good thing. Siegfried ----- Original Message ----- From: "Chuck Hards" <chuckhards@yahoo.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Tuesday, November 02, 2004 9:26 AM Subject: Re: [Utah-astronomy] Re: Great E-bay telescope ad
Then a casting is the obvious way to go. It doesn't have to be metal, either, composites would work fine, in fact better than metal for this application since thermal expansion wouldn't be an issue. (My 5" achromat was pinched in it's factory cell until I opened it up a tad, made a world of difference in performance.)
What's wrong with Patricks existing tube assembly?
--- diveboss@xmission.com wrote:
Chuck,
We need to adapt Patricks 8" lens to fit the Clark's 9" ring.
Guy
Quoting Chuck Hards <chuckhards@yahoo.com>:
A piece that thick won't be cheap (maybe if it's radioactive...).
Is this for a cell or endpiece? If most of the interior is to be machined away, perhaps a casting made from a pattern would be cheaper, and take less time on the lathe to finish...just a thought.
--- Patrick Wiggins <paw@trilobyte.net> wrote:
BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap?
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Great! Then can we count on you to provide the material?
----- Original Message ----- From: "Chuck Hards" <chuckhards@yahoo.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Tuesday, November 02, 2004 9:26 AM Subject: Re: [Utah-astronomy] Re: Great E-bay telescope ad
Then a casting is the obvious way to go. It doesn't have to be metal, either, composites would work fine, in fact better than metal for this application since thermal expansion wouldn't be an issue. (My 5" achromat was pinched in it's factory cell until I opened it up a tad, made a world of difference in performance.)
What's wrong with Patricks existing tube assembly?
--- diveboss@xmission.com wrote:
Chuck,
We need to adapt Patricks 8" lens to fit the Clark's 9" ring.
Guy
Quoting Chuck Hards <chuckhards@yahoo.com>:
A piece that thick won't be cheap (maybe if it's radioactive...).
Is this for a cell or endpiece? If most of the interior is to be machined away, perhaps a casting made from a pattern would be cheaper, and take less time on the lathe to finish...just a thought.
--- Patrick Wiggins <paw@trilobyte.net> wrote:
BTW, speaking of telescope parts, SPOC needs a piece of aluminum about 10.5" to 11" in diameter and 2" to 2.5" thick. Anyone happen to have such a piece laying around or know where it could be purchased cheap?
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Chuck Hards wrote:
What's wrong with Patricks existing tube assembly?
I donated the entire scope to the club, including the tripod. So, should the club ever decide to use it as a transportable scope they can. However, the idea of having the original Clark pier and that gorgeous riveted iron Clark tube be part of the setup was just too tempting to pass up. And, hey, Sieg says that on special nights he'd even be willing to let the club use the Clark objective (oddly enough, while he's donated the pier and tube, he doesn't seem to want to part with the objective...) Patrick
Wasn't that the original "objective"? no pun intended... Quoting Patrick Wiggins <paw@trilobyte.net>:
Chuck Hards wrote:
What's wrong with Patricks existing tube assembly?
I donated the entire scope to the club, including the tripod. So, should the club ever decide to use it as a transportable scope they can.
However, the idea of having the original Clark pier and that gorgeous riveted iron Clark tube be part of the setup was just too tempting to pass up. And, hey, Sieg says that on special nights he'd even be willing to let the club use the Clark objective (oddly enough, while he's donated the pier and tube, he doesn't seem to want to part with the objective...)
Patrick
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"Aluminumum" I had some good customers in Cache Valley who always pronounced it "aluminumum". I know for sure that they don't belong to your 5th Ward, and beer cans were nowhere in sight. Is that a Utahism, or just a Loganism? It always took all of my self control to keep a straight face when they said that. Bob ----- Original Message ----- From: "Barney B." <aaah@sisna.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Monday, November 01, 2004 10:43 AM Subject: Re: [Utah-astronomy] Danger of steel
Yesh, well aluminumum ish often made from recycled beer cans...hic, hic. So bee careful wish that stuff too.
Barney ----- Original Message ----- From: "Barney B." <aaah@sisna.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Monday, November 01, 2004 11:45 AM Subject: Re: [Utah-astronomy] Danger of steel
Ish cuz I'm Bishop of the 5th ward. Ha! Get it? 5th ward.
BB
----- Original Message ----- From: <ziggy943@xmission.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Monday, November 01, 2004 11:09 AM Subject: Re: [Utah-astronomy] Danger of steel
How do you know that Bishop?
Quoting "Barney B." <aaah@sisna.com>:
Yesh, well aluminumum ish often made from recycled beer cans...hic, hic. So bee careful wish that stuff too.
Barney
----- Original Message ----- From: "Patrick Wiggins" <paw@trilobyte.net> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 8:19 PM Subject: [Utah-astronomy] Danger of steel
Bob Grant wrote:
Can you direct me to a source detailing more specific hazards of machining steel?
With tongue firmly implanted in cheek I'll mention that my biggest difficulty with machining steel is the pain caused by the shavings (hundreds of sharp little nasty needles).
Aluminum and plastic shavings are much more finger friendly...
Patrick
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Unless your grinding some of the exotic inserts and inhaling the dust, or machining beryllium, you are probably no worse off handling the more common alloy steels than you would be eating a Big Mac. Not that there's anything wrong with that... ;) Bob, what company did you work for? Guy Quoting Bob Grant <bobmgrant@hotmail.com>:
Joe-
Can you direct me to a source detailing more specific hazards of machining steel?
Yes, I do cut steel, and you probably have too, if you've ever used a hack saw. I'm certainly no expert on this topic, but by expressing my thoughts, maybe we can get input from others. My dad died from asbestos inhalation dating back to the aftermath of the Pearl Harbor attack, and in a sense became a victim of the attack (through corporate negligence of the known hazards) 50 years after the fact. I'd like to know of any hazards that I might be exposing myself to, so, y'all, please speak up. I think that steel is one of the more benign materials to work with. (Coolants and cutting fluids present their own hazards.) I have never heard of any dangers from the components of steel due to machining it, and I have just spent 9 years selling cutting tools to manufacturers and machine shops. I'd like to know more about what you are referring to. Some of the alloying elements in steel might be hazardous in the elemental states, but the worst of these (in commonly available steel) that I can think of off the top of my head are lead, sulfur and phosphorus. Sulfur, and I think lead, were considered safe enough to have come in my childhood chemistry set. These are locked in the crystalline matrix of the steel, probably aren't released in the machining process, and typically make up only .05 to .30 percent of the steel. Steels are dipped into nasty pickling stuff for either heat treating or metal plating operations. The plating plants that I have visited were noxious! Plating is usually done after a part is machined, so cutting plated steel is not very common in manufacturing. It is common for field operations or repair work, such as plumbers cutting threads in galvanized pipe. But at this point, only the metallic plating is present, and not the chemicals used to apply it. I know that welding plated steels can produce toxic gases. Galvanized steel is very common, and a steel that I know not to weld for safety reasons, but I have never heard that it is unsafe to machine. Outside of steel, I have heard that some more exotic bronzes are hazardous to machine, but I believe that this is due to an inhalation problem with the dust it produces. I see a lot more risk with dust producing materials like wood and fiberglass than I do with steel, which forms an elongated, continuous chip in most cases. Cast iron sometimes forms a dust-like chip when it is machined, as would steel on a grinder or sander, so these are cases where breathing protection may be warranted. However, these heavier materials drop out of the air faster than something like wood or fiberglass. Magnesium and titanium can catch fire when being machined, and these fires are difficult to put out. I've heard that machining mag wheels can get exciting real fast, and I've talked to customers who have had titanium fires, but these are pretty rare. I machined my eyepieces from titanium without the least worry of conflagration. I've visited the MagCorp plant west of the Great Salt Lake several times. The chemicals present in their process are so hazardous (chlorine, I believe) that I got turned away at the gate on my first visit because I was wearing contact lenses. You have to keep a respirator on your body the whole time you are on site, but magnesium itself is as safe to touch as aluminum. The tungsten carbide cutting tools I sold came with a hazard label on the boxes, but this referred only to grinding the tungsten carbide, where dust could be a problem. No mention was made of any hazard when using these products for metal-cutting, for which they were intended.
Bob Grant
----- Original Message ----- From: "Joe Bauman" <bau@desnews.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 5:30 PM Subject: Re: [Utah-astronomy] Surveyor Tripod Adapter
Bob, I'm wondering, do you ever cut steel? I know that is a dangerous proposition because steel has some nasty pickling stuff in it. But what's your take on that? Thanks, Joe
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Guy- Beryllium! That's what I was trying to think of when I mentioned bronze. I worked 6 years as a sales rep for Iscar, covering Utah and Idaho, and 3 years for Valenite covering Utah, Idaho, Wyoming and Montana. Where do you work? Bob ----- Original Message ----- From: <diveboss@xmission.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 8:24 PM Subject: Re: OT Re: [Utah-astronomy] Surveyor Tripod Adapter
Unless your grinding some of the exotic inserts and inhaling the dust, or machining beryllium, you are probably no worse off handling the more common alloy steels than you would be eating a Big Mac. Not that there's anything wrong with that... ;)
Bob, what company did you work for?
Guy
Quoting Bob Grant <bobmgrant@hotmail.com>:
Joe-
Can you direct me to a source detailing more specific hazards of machining steel?
Yes, I do cut steel, and you probably have too, if you've ever used a hack saw. I'm certainly no expert on this topic, but by expressing my thoughts, maybe we can get input from others. My dad died from asbestos inhalation dating back to the aftermath of the Pearl Harbor attack, and in a sense became a victim of the attack (through corporate negligence of the known hazards) 50 years after the fact. I'd like to know of any hazards that I might be exposing myself to, so, y'all, please speak up. I think that steel is one of the more benign materials to work with. (Coolants and cutting fluids present their own hazards.) I have never heard of any dangers from the components of steel due to machining it, and I have just spent 9 years selling cutting tools to manufacturers and machine shops. I'd like to know more about what you are referring to. Some of the alloying elements in steel might be hazardous in the elemental states, but the worst of these (in commonly available steel) that I can think of off the top of my head are lead, sulfur and phosphorus. Sulfur, and I think lead, were considered safe enough to have come in my childhood chemistry set. These are locked in the crystalline matrix of the steel, probably aren't released in the machining process, and typically make up only .05 to .30 percent of the steel. Steels are dipped into nasty pickling stuff for either heat treating or metal plating operations. The plating plants that I have visited were noxious! Plating is usually done after a part is machined, so cutting plated steel is not very common in manufacturing. It is common for field operations or repair work, such as plumbers cutting threads in galvanized pipe. But at this point, only the metallic plating is present, and not the chemicals used to apply it. I know that welding plated steels can produce toxic gases. Galvanized steel is very common, and a steel that I know not to weld for safety reasons, but I have never heard that it is unsafe to machine. Outside of steel, I have heard that some more exotic bronzes are hazardous to machine, but I believe that this is due to an inhalation problem with the dust it produces. I see a lot more risk with dust producing materials like wood and fiberglass than I do with steel, which forms an elongated, continuous chip in most cases. Cast iron sometimes forms a dust-like chip when it is machined, as would steel on a grinder or sander, so these are cases where breathing protection may be warranted. However, these heavier materials drop out of the air faster than something like wood or fiberglass. Magnesium and titanium can catch fire when being machined, and these fires are difficult to put out. I've heard that machining mag wheels can get exciting real fast, and I've talked to customers who have had titanium fires, but these are pretty rare. I machined my eyepieces from titanium without the least worry of conflagration. I've visited the MagCorp plant west of the Great Salt Lake several times. The chemicals present in their process are so hazardous (chlorine, I believe) that I got turned away at the gate on my first visit because I was wearing contact lenses. You have to keep a respirator on your body the whole time you are on site, but magnesium itself is as safe to touch as aluminum. The tungsten carbide cutting tools I sold came with a hazard label on the boxes, but this referred only to grinding the tungsten carbide, where dust could be a problem. No mention was made of any hazard when using these products for metal-cutting, for which they were intended.
Bob Grant
----- Original Message ----- From: "Joe Bauman" <bau@desnews.com> To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Sent: Sunday, October 31, 2004 5:30 PM Subject: Re: [Utah-astronomy] Surveyor Tripod Adapter
Bob, I'm wondering, do you ever cut steel? I know that is a dangerous proposition because steel has some nasty pickling stuff in it. But what's your take on that? Thanks, Joe
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participants (11)
-
Barney B. -
Bob Grant -
Chuck Hards -
diveboss＠xmission.com -
Jim Gibson -
Joe Bauman -
Josephine Grahn -
Naz_David -
Patrick Wiggins -
Siegfried Jachmann -
ziggy943＠xmission.com