A hack saw attachment for the lathe?

B

Bob Kelly III

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I've been thinking about making a power hacksaw attachment for my lathe.... just to cut through big chunks of steel..... I don't have a chop saw or a metal cutting bandsaw
just a reciprocating saw.... and I use it all the time... but I was thinking that I could make a power hack saw attachment for the lathe sense my lathe can go extremely slow
..... has anyone already done this ? is it worth the effort ? i have a feeling it would be thrown in a corner and never used ! LOL..... but I could make the stroke adjustable and have it clamp to the chip pan and just chuck up the crank in the lathe and turn it on.......
what do you guys think ?
....
Bob.......
 
Sounds like quite the project but I too would love to see what you come up with! If I didn't have a bandsaw I'd probably just get me a cordless portaband. That way it would be useful for other things also.
 
Just hold the saw still and let it slowly drop onto the turning part. (don't worry about the bed, it won't be turning)

Edit: correct typo
 
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It might be easier to hacksaw some parts off rather than parting. Not a bad idea, Bob. Hope you will pursue this a bit more.
 
T Bredehoft said:
Just hold the saw still and let lillt slowly drop onto the turning part. (don't worry about the bed, it won't be turning)
Click to expand...
That amounts to single point cutting with a 12" tool. It wouldn't cut for long and wouldn't cut well as there would be no where for the chip to escape the gullet of the 1 tooth that is engaged in the work.
 
T Bredehoft said:
Just hold the saw still and let lillt slowly drop onto the turning part. (don't worry about the bed, it won't be turning)
Click to expand...
LOL that don't work worth a darn I've tried it ! trying to part off things.... it takes way too long !.....Bob.......
 
a friend of mine suggested a small engine crankshaft and rod as the part you chuck up in the lathe ...a bar from the rod to a hinged lever to adjust the stroke of the hack saw.... i thought that was a clever idea ! might cut down on allot of vibration by doing it that way !
.....
it's obviously gott'a have some sort of table to it that is solidly fixed to the lathe, maybe clamped to the chip pan with short legs. and welded on vice grips !
.....
it also needs a clamp to hold the work... and I have saved a quick vice setup from an old chop saw that burnt up in the ranch fire years ago which may be the perfect answer to this idea.....
I will be sure to take allot of pictures for you guys.... but right now nothing is going to happen till it warms up outside
as my shop is not heated !
later all !
Bob.......




.....
 
Bob Kelly III said:
I've been thinking about making a power hacksaw attachment for my lathe.... just to cut through big chunks of steel..... I don't have a chop saw or a metal cutting bandsaw
just a reciprocating saw.... and I use it all the time... but I was thinking that I could make a power hack saw attachment for the lathe sense my lathe can go extremely slow..... has anyone already done this ? is it worth the effort ? but I could make the stroke adjustable and have it clamp to the chip pan and just chuck up the crank in the lathe and turn it on.......
what do you guys think ?
....
Bob.......
Click to expand...
How slow does your lathe go? 12 RPM? I don't think you would want above 20RPM. I think by the time you make up the bed, clamp, slides, you have the hardest part done. An old motor, switches, wiring, and a couple of pulleys, and you have it all done.

Ok, I looked it up, and I am off on the speeds. seems like 100 strokes per min are more the norm.

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That seems awful fast for an arm reaching from your lathe, to a hacksaw table to me.


Bob Kelly III said:
a friend of mine suggested a small engine crankshaft and rod as the part you chuck up in the lathe ...a bar from the rod to a hinged lever to adjust the stroke of the hack saw.... i thought that was a clever idea ! might cut down on allot of vibration by doing it that way !
Click to expand...
A 1&1/2" to 2" stroke, with an arm going to a reciprocating lever to increase the stroke to the 6" to 10 or so inches you would want to use the whole blade, will likely give lots more vibration. Now maybe if you use a long arm, and have it pivot bear the center, so half is going in each direction, may work.
.....
it's obviously gott'a have some sort of table to it that is solidly fixed to the lathe, maybe clamped to the chip pan with short legs. and welded on vice grips !
.....
it also needs a clamp to hold the work... and I have saved a quick vice setup from an old chop saw that burnt up in the ranch fire years ago which may be the perfect answer to this idea.....
I will be sure to take allot of pictures for you guys.... but right now nothing is going to happen till it warms up outside
as my shop is not heated !
later all !
Bob.......
Click to expand...

i have a feeling it would be thrown in a corner and never used ! LOL.....
Click to expand...
Thats what I would hate to see, all the work done, and then used a few times. Maybe try to draw up some ideas, and bounce them off the brain trust here.
 
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