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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Toolpost rocking with cheap two bolt mount
I was making a cut-off last night with my Aloris AXA-77. After
reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... Still have to get a 4x6 bandsaw and a Set-Tru chuck. Most likely about the start of February. |
#2
Posted to rec.crafts.metalworking
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Toolpost rocking with cheap two bolt mount
Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... You don't mention the size/make of your lathe. I used to have Atlas-made lathes, both 10" and later a 12". The compound of these was a bit flexible, but it would still smash a cutoff blade or rip the work out of the chuck rather than really flex things a whole bunch. My 15" Sheldon does MUCH better at cutoff due to the enormous rigidity of the carriage assembly on up. Mostly it just makes a big crunch and the little roll of swarf that had bound up in the cut gets smashed and it keeps right on cutting. Jon |
#3
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Toolpost rocking with cheap two bolt mount
Using an 11x26 Grizzly G9972Z lather (CQ6128A) with the original
compound slide and clamp. Jon Elson wrote: Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... You don't mention the size/make of your lathe. I used to have Atlas-made lathes, both 10" and later a 12". The compound of these was a bit flexible, but it would still smash a cutoff blade or rip the work out of the chuck rather than really flex things a whole bunch. My 15" Sheldon does MUCH better at cutoff due to the enormous rigidity of the carriage assembly on up. Mostly it just makes a big crunch and the little roll of swarf that had bound up in the cut gets smashed and it keeps right on cutting. Jon |
#4
Posted to rec.crafts.metalworking
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Toolpost rocking with cheap two bolt mount
On Jan 8, 7:14 am, Louis Ohland wrote:
I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... Still have to get a 4x6 bandsaw and a Set-Tru chuck. Most likely about the start of February. This is a Chinese copy of the old Emco design. My 7" Emcomat has done similar moves. I have seen writing and prints of making a new ring with 4 mounting bolts. I have also seen pictures of broken rings on Emco machines. You might disassemble the whole thing and see if the mounting ring had racks in it. Paul |
#5
Posted to rec.crafts.metalworking
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Toolpost rocking with cheap two bolt mount
On Jan 8, 3:16 pm, " wrote:
On Jan 8, 7:14 am, Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... Still have to get a 4x6 bandsaw and a Set-Tru chuck. Most likely about the start of February. This is a Chinese copy of the old Emco design. My 7" Emcomat has done similar moves. I have seen writing and prints of making a new ring with 4 mounting bolts. I have also seen pictures of broken rings on Emco machines. You might disassemble the whole thing and see if the mounting ring had racks in it. Paul Oh, nuts! I mean "cracks in it"!!!!! Paul |
#6
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Toolpost rocking with cheap two bolt mount
Might be you have the gibes a bit loose ? Too much slop on a normal day ?
If you run dry and hot - you can be welding the edge onto the work. A little bur of melted stuff can stick on a corner of the cutter - and then it grabs.. I never cross cut in a slot that is the width of the blade - no space to have flex if it has to or take chips or whatever. Cooling is best. The -77 - it that the thin blade ? Might be extending out to far also. I have snapped off the blade. I use the carbide tip one and pick left, right or center cut. Martin Sheldon 11x44 Aloris using AXA* Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net TSRA, Life; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal. NRA Second Amendment Task Force Charter Founder IHMSA and NRA Metallic Silhouette maker & member. http://lufkinced.com/ Louis Ohland wrote: Using an 11x26 Grizzly G9972Z lather (CQ6128A) with the original compound slide and clamp. Jon Elson wrote: Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... You don't mention the size/make of your lathe. I used to have Atlas-made lathes, both 10" and later a 12". The compound of these was a bit flexible, but it would still smash a cutoff blade or rip the work out of the chuck rather than really flex things a whole bunch. My 15" Sheldon does MUCH better at cutoff due to the enormous rigidity of the carriage assembly on up. Mostly it just makes a big crunch and the little roll of swarf that had bound up in the cut gets smashed and it keeps right on cutting. Jon |
#7
Posted to rec.crafts.metalworking
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Toolpost rocking with cheap two bolt mount
" wrote in message ... On Jan 8, 7:14 am, Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... Still have to get a 4x6 bandsaw and a Set-Tru chuck. Most likely about the start of February. This is a Chinese copy of the old Emco design. My 7" Emcomat has done similar moves. I have seen writing and prints of making a new ring with 4 mounting bolts. I have also seen pictures of broken rings on Emco machines. You might disassemble the whole thing and see if the mounting ring had racks in it. Paul I don't know this lathe, but I ran across some guy on e-bay selling mounting rings for a lathe - they were supposed to be better and more wonderful - maybe they are an upgrade that would be helpful - it was an auction that closed today, probably no bids - looked like he was in the business of making these things, whatever they are -- Posted via a free Usenet account from http://www.teranews.com |
#8
Posted to rec.crafts.metalworking
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Toolpost rocking with cheap two bolt mount
I leave it up to my Dad to set up the lathe (its his, anyways). But the
gibs seem tight. I'd have to czech. Using an SGIH 19-2PS with .093 (IIRC) inserts. Blade is out about 3/4". Cutting hot rolled steel with the gnarly looking resultant finish. The welding might have happened, I'd have to look at the insert. Note to all: An insert does not fully seat until you advance it into a workpiece or tap it in using wood and a hammer. Martin H. Eastburn wrote: Might be you have the gibes a bit loose ? Too much slop on a normal day ? If you run dry and hot - you can be welding the edge onto the work. A little bur of melted stuff can stick on a corner of the cutter - and then it grabs.. I never cross cut in a slot that is the width of the blade - no space to have flex if it has to or take chips or whatever. Cooling is best. The -77 - it that the thin blade ? Might be extending out to far also. I have snapped off the blade. I use the carbide tip one and pick left, right or center cut. Martin Sheldon 11x44 Aloris using AXA* Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net TSRA, Life; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal. NRA Second Amendment Task Force Charter Founder IHMSA and NRA Metallic Silhouette maker & member. http://lufkinced.com/ Louis Ohland wrote: Using an 11x26 Grizzly G9972Z lather (CQ6128A) with the original compound slide and clamp. Jon Elson wrote: Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... You don't mention the size/make of your lathe. I used to have Atlas-made lathes, both 10" and later a 12". The compound of these was a bit flexible, but it would still smash a cutoff blade or rip the work out of the chuck rather than really flex things a whole bunch. My 15" Sheldon does MUCH better at cutoff due to the enormous rigidity of the carriage assembly on up. Mostly it just makes a big crunch and the little roll of swarf that had bound up in the cut gets smashed and it keeps right on cutting. Jon |
#9
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Toolpost rocking with cheap two bolt mount
Cutting hot rolled steel with the gnarly looking resultant finish.
That's not uncommon for hot-rolled steel. One commenter here once compared it to machining pink erasers... --Glenn Lyford |
#10
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Toolpost rocking with cheap two bolt mount
Now that I have the DRO on my X3 working, I was going to make a steel
four bolt clamp. William Noble wrote: " wrote in message ... On Jan 8, 7:14 am, Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... Still have to get a 4x6 bandsaw and a Set-Tru chuck. Most likely about the start of February. This is a Chinese copy of the old Emco design. My 7" Emcomat has done similar moves. I have seen writing and prints of making a new ring with 4 mounting bolts. I have also seen pictures of broken rings on Emco machines. You might disassemble the whole thing and see if the mounting ring had racks in it. Paul I don't know this lathe, but I ran across some guy on e-bay selling mounting rings for a lathe - they were supposed to be better and more wonderful - maybe they are an upgrade that would be helpful - it was an auction that closed today, probably no bids - looked like he was in the business of making these things, whatever they are |
#11
Posted to rec.crafts.metalworking
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Toolpost rocking with cheap two bolt mount
If you can cool it some how or do pecking cuts it might improve greatly.
Cooling doesn't have to chill - just flood with oil and it will carry away some heat. Often I use WD-40 which does both light chilling and light oiling and light lube. Martin Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal. NRA Second Amendment Task Force Charter Founder IHMSA and NRA Metallic Silhouette maker & member. http://lufkinced.com/ Louis Ohland wrote: I leave it up to my Dad to set up the lathe (its his, anyways). But the gibs seem tight. I'd have to czech. Using an SGIH 19-2PS with .093 (IIRC) inserts. Blade is out about 3/4". Cutting hot rolled steel with the gnarly looking resultant finish. The welding might have happened, I'd have to look at the insert. Note to all: An insert does not fully seat until you advance it into a workpiece or tap it in using wood and a hammer. Martin H. Eastburn wrote: Might be you have the gibes a bit loose ? Too much slop on a normal day ? If you run dry and hot - you can be welding the edge onto the work. A little bur of melted stuff can stick on a corner of the cutter - and then it grabs.. I never cross cut in a slot that is the width of the blade - no space to have flex if it has to or take chips or whatever. Cooling is best. The -77 - it that the thin blade ? Might be extending out to far also. I have snapped off the blade. I use the carbide tip one and pick left, right or center cut. Martin Sheldon 11x44 Aloris using AXA* Martin H. Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net TSRA, Life; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal. NRA Second Amendment Task Force Charter Founder IHMSA and NRA Metallic Silhouette maker & member. http://lufkinced.com/ Louis Ohland wrote: Using an 11x26 Grizzly G9972Z lather (CQ6128A) with the original compound slide and clamp. Jon Elson wrote: Louis Ohland wrote: I was making a cut-off last night with my Aloris AXA-77. After reducing speed from 750rpm to 150rpm, and resetting the height of the blade, things worked MUCH better, But as it got close to cut-off, it grabbed a bit and the whole toolpost, compound slide, and clamp ring ROCKED towards the workpiece... Now there's something you don't see every day... You don't mention the size/make of your lathe. I used to have Atlas-made lathes, both 10" and later a 12". The compound of these was a bit flexible, but it would still smash a cutoff blade or rip the work out of the chuck rather than really flex things a whole bunch. My 15" Sheldon does MUCH better at cutoff due to the enormous rigidity of the carriage assembly on up. Mostly it just makes a big crunch and the little roll of swarf that had bound up in the cut gets smashed and it keeps right on cutting. Jon |
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