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.
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
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
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*
Mart> Using an 11x26 Grizzly G9972Z lather (CQ6128A) with the original
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
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 > Might be you have the gibes a bit loose ? Too much slop on a normal day ? >
That's not uncommon for hot-rolled steel. One commenter here once compared it to machining pink erasers... --Glenn Lyford
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.