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the mess of machining cast iron
I found some type of cast iron caster just under 3" in diameter on the
street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? |
the mess of machining cast iron
try a vacuum
On 2014-06-09, Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? |
the mess of machining cast iron
Ignoramus5207 wrote:
try a vacuum should try this. once the dust hits steel, it seems sort of magnet and tends to just cling there. Horrible stuff. On 2014-06-09, Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? |
the mess of machining cast iron
Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. |
the mess of machining cast iron
On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C."
wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. And even a "chip breaker" grind on the tool doesn't do the job!!! |
the mess of machining cast iron
On Monday, June 9, 2014 12:57:31 PM UTC-4, Cydrome Leader wrote:
I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A good idea that I read here is to turn a zip lock bag inside out and put a magnet in it. Pick up the magnetic smarf and then turn the bag right side out so the smarf in inside the bag and the magnet is on the outside. Sorry , but I do not remember the original poster. Dan |
the mess of machining cast iron
On Mon, 9 Jun 2014 16:57:31 +0000 (UTC), Cydrome Leader
wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? Now you know why cast iron is cut with flood coolant. "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" |
the mess of machining cast iron
On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C."
wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" |
the mess of machining cast iron
"Gunner Asch" wrote in message
... Now you know why cast iron is cut with flood coolant. One of the old books Lindsay sold described the Cincinnati Milling Machine Company's experiments with feeds and speeds back around WW1, before carbide and flood coolant(?). They said that cast iron machined about the same with or without cutting oil and suggested milling it dry only to minimize the oily mess. Some of that dust is graphite and not magnetic. |
the mess of machining cast iron
Jim Wilkins wrote:
"Gunner Asch" wrote in message ... Now you know why cast iron is cut with flood coolant. One of the old books Lindsay sold described the Cincinnati Milling Machine Company's experiments with feeds and speeds back around WW1, before carbide and flood coolant(?). They said that cast iron machined about the same with or without cutting oil and suggested milling it dry only to minimize the oily mess. Some of that dust is graphite and not magnetic. the home machine type forums go back and forth on this. "Machine cast iron dry" seems to be the mantra, but people with huge machines in large shops do appear to use flood coolant, which isn't going to be happening with any of the tabletop stuff I use. I can't wait to see what sort of mess flycutting the stuff makes. Any favorite durabar or equivalent cast iron barstock internet suppliers people suggest? onlinemetals.com doesn't seem to carry the stuff for some reason. |
the mess of machining cast iron
Cydrome Leader fired this volley in news:ln5f5v
: I can't wait to see what sort of mess flycutting the stuff makes. Hasn't anyone here ever heard of a vacuum cleaner? Lloyd |
the mess of machining cast iron
"Cydrome Leader" wrote in message ... Jim Wilkins wrote: "Gunner Asch" wrote in message ... Now you know why cast iron is cut with flood coolant. One of the old books Lindsay sold described the Cincinnati Milling Machine Company's experiments with feeds and speeds back around WW1, before carbide and flood coolant(?). They said that cast iron machined about the same with or without cutting oil and suggested milling it dry only to minimize the oily mess. Some of that dust is graphite and not magnetic. the home machine type forums go back and forth on this. "Machine cast iron dry" seems to be the mantra, but people with huge machines in large shops do appear to use flood coolant, which isn't going to be happening with any of the tabletop stuff I use. I can't wait to see what sort of mess flycutting the stuff makes. Any favorite durabar or equivalent cast iron barstock internet suppliers people suggest? onlinemetals.com doesn't seem to carry the stuff for some reason. When I made some parts from gym weights I just ran the lathe slowly enough that the chips didn't go far. -jsw |
the mess of machining cast iron
On Mon, 9 Jun 2014 19:00:02 -0400, "Jim Wilkins"
wrote: "Gunner Asch" wrote in message .. . Now you know why cast iron is cut with flood coolant. One of the old books Lindsay sold described the Cincinnati Milling Machine Company's experiments with feeds and speeds back around WW1, before carbide and flood coolant(?). They said that cast iron machined about the same with or without cutting oil and suggested milling it dry only to minimize the oily mess. Some of that dust is graphite and not magnetic. Correct. However if you have dust due to tool and Depth of Cut issues..simply flood it away into the chip tray. Some materials other than cast iron have similar problems..some bronzes and brasses..and the only way to contain them..is to wet them down and flood them off the work area. Water based coolants work for this as well as oils and in some cases..better because you can evaporate the water later. Gunner "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" |
the mess of machining cast iron
On Mon, 09 Jun 2014 18:34:22 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: Cydrome Leader fired this volley in news:ln5f5v : I can't wait to see what sort of mess flycutting the stuff makes. Hasn't anyone here ever heard of a vacuum cleaner? Lloyd That works well enough with a lathe..not so good with a mill of any size. "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" |
the mess of machining cast iron
On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C."
wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. A "chip breaker" is needed if you machine much stainless. :-) -- Cheers, Jphn B. |
the mess of machining cast iron
On Mon, 09 Jun 2014 14:12:20 -0700, Gunner Asch
wrote: On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C." wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. Not in my experience "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" |
the mess of machining cast iron
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the mess of machining cast iron
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the mess of machining cast iron
On Mon, 09 Jun 2014 21:47:13 -0500, "Pete C."
wrote: wrote: On Mon, 09 Jun 2014 14:12:20 -0700, Gunner Asch wrote: On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C." wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. Not in my experience Nor mine. I've been using good carbide insert tooling (Kennemetal stuff I got years back and had to mill down to fit my smaller lathe) as well as cheap Chinese insert tooling. All of the inserts have chip breaker profiles, and neither the high end nor the Chinese break the 304 chips with any consistency. Occasionally a pass will be just right and the chips break, but most of the time I get long swarf-o-doom. The breaker just makes the swarf a tighter curl. |
the mess of machining cast iron
On 2014-06-10, Pete C. wrote:
Nor mine. I've been using good carbide insert tooling (Kennemetal stuff I got years back and had to mill down to fit my smaller lathe) as well as cheap Chinese insert tooling. All of the inserts have chip breaker profiles, and neither the high end nor the Chinese break the 304 chips with any consistency. Occasionally a pass will be just right and the chips break, but most of the time I get long swarf-o-doom. Pete, did you consider interrupting your cutting every few revolutions or so, just stopping the cutter momentarily while the part still spins? i |
the mess of machining cast iron
Ignoramus32376 fired this volley in
: Pete, did you consider interrupting your cutting every few revolutions or so, just stopping the cutter momentarily while the part still spins? Well, THAT would be great for surface finish! Of course, he could do that while roughing, and still put up with the 'stringies' on the finishing passes. Lloyd |
the mess of machining cast iron
"Lloyd E. Sponenburgh" wrote: Ignoramus32376 fired this volley in : Pete, did you consider interrupting your cutting every few revolutions or so, just stopping the cutter momentarily while the part still spins? Well, THAT would be great for surface finish! Of course, he could do that while roughing, and still put up with the 'stringies' on the finishing passes. Lloyd Exactly, every stop is like doing a "spring" pass and the second rev it cuts deeper, even with a pretty rigid setup. Mostly I just put on a heavy glove and clear out the swarf-o-doom every couple passes lest the active swarf pull in the residual swarf and make a rats nest surrounding the part. |
the mess of machining cast iron
On Tue, 10 Jun 2014 13:50:42 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: Ignoramus32376 fired this volley in m: Pete, did you consider interrupting your cutting every few revolutions or so, just stopping the cutter momentarily while the part still spins? Well, THAT would be great for surface finish! Of course, he could do that while roughing, and still put up with the 'stringies' on the finishing passes. Lloyd I've resorted to that on occaision. The final cut then makes stainless steel wool if the cutter is good and sharp - and that crap winds around everything and flies off in lumps in all directions. |
the mess of machining cast iron
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the mess of machining cast iron
On Tue, 10 Jun 2014 14:36:35 -0500, "Pete C."
wrote: "Lloyd E. Sponenburgh" wrote: Ignoramus32376 fired this volley in : Pete, did you consider interrupting your cutting every few revolutions or so, just stopping the cutter momentarily while the part still spins? Well, THAT would be great for surface finish! Of course, he could do that while roughing, and still put up with the 'stringies' on the finishing passes. Lloyd Exactly, every stop is like doing a "spring" pass and the second rev it cuts deeper, even with a pretty rigid setup. Mostly I just put on a heavy glove and clear out the swarf-o-doom every couple passes lest the active swarf pull in the residual swarf and make a rats nest surrounding the part. I caught my foot on a long SS chip that was on the floor. It was there because I was making long stringy chips so fast the chip pan couldn't handle them. The chip cut right through the top of my new right boot. I hate 304 chips. Eric |
the mess of machining cast iron
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the mess of machining cast iron
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the mess of machining cast iron
On Mon, 09 Jun 2014 21:47:13 -0500, "Pete C."
wrote: wrote: On Mon, 09 Jun 2014 14:12:20 -0700, Gunner Asch wrote: On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C." wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. Not in my experience Nor mine. I've been using good carbide insert tooling (Kennemetal stuff I got years back and had to mill down to fit my smaller lathe) as well as cheap Chinese insert tooling. All of the inserts have chip breaker profiles, and neither the high end nor the Chinese break the 304 chips with any consistency. Occasionally a pass will be just right and the chips break, but most of the time I get long swarf-o-doom. Strange. I was grinding chip breakers, that worked, 40 years ago. do you reckon 304 has changed that much over the years? -- Cheers, Jphn B. |
the mess of machining cast iron
On Wed, 11 Jun 2014 06:11:56 +0700, John B.
wrote: Strange. I was grinding chip breakers, that worked, 40 years ago. do you reckon 304 has changed that much over the years? There are several different styles/types of chip breakers. What did you use? Here are several types suitable for the HSM http://www.practicalmachinist.com/vb...reaker-219269/ http://www.gadgetbuilder.com/LatheBitSharpening.html https://www.google.com/search?q=hss+...1093&bi h=474 If you are using carbide inserts see http://www.google.com/url?sa=t&rct=j...,d.aWw&cad=rja -- Unka' George "Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants, but debt is the money of slaves" -Norm Franz, "Money and Wealth in the New Millenium" |
the mess of machining cast iron
wrote: I've resorted to that on occaision. The final cut then makes stainless steel wool if the cutter is good and sharp - and that crap winds around everything and flies off in lumps in all directions. Still easier than shearing stainless steel sheep. ;-) -- Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com |
the mess of machining cast iron
On 2014-06-10, Pete C. wrote:
wrote: On Mon, 09 Jun 2014 14:12:20 -0700, Gunner Asch wrote: On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C." wrote: [ ... ] I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. Not in my experience Nor mine. I've been using good carbide insert tooling (Kennemetal stuff I got years back and had to mill down to fit my smaller lathe) as well as cheap Chinese insert tooling. All of the inserts have chip breaker profiles, and neither the high end nor the Chinese break the 304 chips with any consistency. Occasionally a pass will be just right and the chips break, but most of the time I get long swarf-o-doom. The chip breaker grooves are one thing. A more extreme way is the way the Aloris BXA16N (and presumably both other sizes of that line, and other models of the direct insert holders from Aloris) work. They have a sliding clamp over the insert with provisions to move a carbide ramp (which is part of the clamp) to a fairly wide range of distances behind the cutting edge, so you can tune the chipbreaker part to your needs. In the 16N, the groove in the inserts which I use is to produce effective positive rake in a negative rake holder. Granted, I haven't turned 304 SS, and from what I've read about it, I don't really *want* to, so 304 SS may defeat even the tunable chipbreaker on the Aloris tuning. Enjoy, DoN. -- Remove oil spill source from e-mail Email: | (KV4PH) Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
the mess of machining cast iron
On Tue, 10 Jun 2014 18:38:57 -0500, F. George McDuffee
wrote: On Wed, 11 Jun 2014 06:11:56 +0700, John B. wrote: Strange. I was grinding chip breakers, that worked, 40 years ago. do you reckon 304 has changed that much over the years? There are several different styles/types of chip breakers. What did you use? Here are several types suitable for the HSM http://www.practicalmachinist.com/vb...reaker-219269/ http://www.gadgetbuilder.com/LatheBitSharpening.html https://www.google.com/search?q=hss+...1093&bi h=474 If you are using carbide inserts see http://www.google.com/url?sa=t&rct=j...,d.aWw&cad=rja Funny how the old foogies all seem to know this stuff that is a mystery to the younger whippersnappers :-) But in answer to the question, just a step behind the cutting edge similar to that shown in George's references. It is somewhat dependant on feeds though and a chip breaker that works at high feed rates may not be useful with very light cuts. For very light cuts I'd guess that the shoulder of the chipbreaker would be very close to the cutting edge, but I don't remember ever grinding one like that. But, back in the days of high speed toolbits you tended to grind a basic shape and if it didn't cut just right you just went over to the pedestal grinder and changed it a little. -- Cheers, Jphn B. |
the mess of machining cast iron
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the mess of machining cast iron
On Mon, 9 Jun 2014 16:57:31 +0000 (UTC), Cydrome Leader
wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? ====================== Be reminded that fine cast iron dust/graphite is flamable/explosive. It is an ingredient in sparklers and fireworks. *FINE* cast iron dust/graphite in an explosive charge makes a much louder bang and a bright white flash, e. g. firecrackers, most likely due to the fuel/air effect. Grain dust/flour in air will also explode under the right conditions. http://en.wikipedia.org/wiki/Dust_explosion http://www.youtube.com/watch?v=wUhzrtM9wcw https://www.google.com/search?q=iron...w=1093&bih=474 -- Unka' George "Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants, but debt is the money of slaves" -Norm Franz, "Money and Wealth in the New Millenium" |
the mess of machining cast iron
On 11 Jun 2014 01:43:45 GMT, "DoN. Nichols"
wrote: On 2014-06-10, Pete C. wrote: wrote: On Mon, 09 Jun 2014 14:12:20 -0700, Gunner Asch wrote: On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C." wrote: [ ... ] I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. Not in my experience Nor mine. I've been using good carbide insert tooling (Kennemetal stuff I got years back and had to mill down to fit my smaller lathe) as well as cheap Chinese insert tooling. All of the inserts have chip breaker profiles, and neither the high end nor the Chinese break the 304 chips with any consistency. Occasionally a pass will be just right and the chips break, but most of the time I get long swarf-o-doom. The chip breaker grooves are one thing. A more extreme way is the way the Aloris BXA16N (and presumably both other sizes of that line, and other models of the direct insert holders from Aloris) work. They have a sliding clamp over the insert with provisions to move a carbide ramp (which is part of the clamp) to a fairly wide range of distances behind the cutting edge, so you can tune the chipbreaker part to your needs. In the 16N, the groove in the inserts which I use is to produce effective positive rake in a negative rake holder. Granted, I haven't turned 304 SS, and from what I've read about it, I don't really *want* to, so 304 SS may defeat even the tunable chipbreaker on the Aloris tuning. It can be some very...frustrating and nasty stuff even..hell...particularly in the commercial shops. It slows production way the hell down, causes many injuries and is an utter bugger do deal with. Enjoy, DoN. "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" |
the mess of machining cast iron
On Wed, 11 Jun 2014 00:14:51 -0400, John
wrote: wrote: On Mon, 09 Jun 2014 14:12:20 -0700, Gunner Asch wrote: On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C." wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. Not in my experience "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" Slower rpm heavier cut. If your machine is strong enough. john Not necessarily. I learned about chip breakers turning a 7 inch piece of 304 about 3 feet long down to 5 inches. It was cutting pretty good and I cranked the spindle speed up a bit and it shot a light brown chip straight off the tool bit and right past the tail stock. It must have been 15 feet long by the time I got the lathe turned off. That damned chip must have been a quarter of an inch wide and about an eighth of an inch thick. One of the other guys walked over and said "Maybe you might need a chip breaker there". and I said, "Show me how to grind one". -- Cheers, Jphn B. |
the mess of machining cast iron
"John B." wrote in message
... I learned about chip breakers turning a 7 inch piece of 304 about 3 feet long down to 5 inches. It was cutting pretty good and I cranked the spindle speed up a bit and it shot a light brown chip straight off the tool bit and right past the tail stock. It must have been 15 feet long by the time I got the lathe turned off. That damned chip must have been a quarter of an inch wide and about an eighth of an inch thick. One of the other guys walked over and said "Maybe you might need a chip breaker there". and I said, "Show me how to grind one". -- Cheers, Jphn B. What do you think of this? http://www.gadgetbuilder.com/LatheBitSharpening.html -jsw |
the mess of machining cast iron
On Wed, 11 Jun 2014 00:14:51 -0400, John
wrote: wrote: On Mon, 09 Jun 2014 14:12:20 -0700, Gunner Asch wrote: On Mon, 09 Jun 2014 13:10:03 -0500, "Pete C." wrote: Cydrome Leader wrote: I found some type of cast iron caster just under 3" in diameter on the street so I tossed it into the Sherline lathe to true it up for practice. The stuff machines great with carbide, but the mess it makes is incredible. I covered what I could with newspaper, but the dust goes everywhere. I tried to hold a magnet by the cutter to catch some of the dust before it went everywhere, which helped a bit, but there was still a layer of dust everywhere. I'm still in the process of cleaning up with oily rags. Any special methods people here use to prevent and then clean up cast iron messes? A vacuum nozzle by the cut while cutting may help. I've been dealing with the fun of "stainless swarf of doom" the past few days. 304SS seems to machine ok on my lathe, but it does indeed tend to produce endless swarf that tries to tangle up everywhere. Put a chip breaker on your cutter and it may help. Not in my experience "Libertarianism IS fascism... Fascism is corporate government – a Libertarian’s wet dream" Tala Brandeis Owner at Tala Brandeis Associates" Slower rpm heavier cut. If your machine is strong enough. john I made a shifter knob for my old Mini when I was 16 out of a chunk of that crap.. The "rough cut" sure lived up to it's name and made the 10" south bend grunt. The finish cuts made gobs of wool. Don't know if I would want to do it on my Myford Super 7. |
the mess of machining cast iron
On Wed, 11 Jun 2014 19:47:28 -0400, "Jim Wilkins"
wrote: "John B." wrote in message .. . I learned about chip breakers turning a 7 inch piece of 304 about 3 feet long down to 5 inches. It was cutting pretty good and I cranked the spindle speed up a bit and it shot a light brown chip straight off the tool bit and right past the tail stock. It must have been 15 feet long by the time I got the lathe turned off. That damned chip must have been a quarter of an inch wide and about an eighth of an inch thick. One of the other guys walked over and said "Maybe you might need a chip breaker there". and I said, "Show me how to grind one". -- Cheers, Jphn B. What do you think of this? http://www.gadgetbuilder.com/LatheBitSharpening.html -jsw Nothing wrong with it but I never say anyone who worked in a shop use anything like that. In the Airforce shop we used to have the kids just starting out make a little sheet metal gauge with the various angles on it to check their tool bits but by the time they were a journeyman they didn't use it any more. -- Cheers, Jphn B. |
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