How can i get CLEAN cuts on big tubes?

[06RTCharger]

I went out to lowes to check out some hacksaws and handsaws to cut my 8inch diameter clear polycarbonate tube. Came home with a LENOX PVC/ABS 18" hand saw. Shit aint workin too good lol. Ive tried the jigsaw with blades made for plastic cuts, cuts FLAT plastic really smooth. But the tube has a slight flex and it starts to bang and bounce around dangerously when i try to jigsaw. My next idea is use my dremel with a plastic cutting blade and go lil by lil. Ive tried the bandsaw at work (im a butcher) almost lost a hand doin that shit, the plastic cut good for four seconds then SLAMMED the tube and my hand, aint tryin band saws again even with a more proper blade lol. Another thought i had was seeing if lowes would cut it for me even thought it aint bought from them. Any other ideas you guys got? Heres a few pics of how that hand saw cut it. 

 

[06RTCharger]

I guess i cant post pics lol my phones pics are too big of a file? Worked fine the other day.

[boomintahoe]

Use photobucket.

In reality, a metal lathe would have the best clean cut for that tube. Next best idea is prob a table saw. But it's tricky cutting those tubes because of chipping. Take that back, a mitersaw would be the next best thing.

[06RTCharger]

1 hour ago, boomintahoe said:

Use photobucket.

In reality, a metal lathe would have the best clean cut for that tube. Next best idea is prob a table saw. But it's tricky cutting those tubes because of chipping. Take that back, a mitersaw would be the next best thing.

I have the imgurl app, but i paid for a Gold membership so i could post pics directly. It worked earlier when i was posting on the secondskin sale.

thanks ill check out what those are. 

[06RTCharger]

Metal lathe, no ways imma be able to get one of those lol. Costs thousands. The mitersaw, i was checking those out at lowes earlier but those look like it might do the same thing the bandsaw did and yank and slam the tube and almost cut my hands, speacially because its hard to secure the tube and the tube isnt very "stiff and rigid". I can easily make the tube flex, but its still very strong and durable not britle at all. The flex it has i think that causes the blade to BITE in really hard, kind of like feeding material into a router table from the wrong direction (ive done that also lol). 

[boomintahoe]

More teeth on the blade and cut slower for that type of material.

No I'm not saying go out and buy a lathe. But if you knew someone that has one, that'd be your best bet.

[s5300]

2 hours ago, 06RTCharger said:

Metal lathe, no ways imma be able to get one of those lol. Costs thousands. The mitersaw, i was checking those out at lowes earlier but those look like it might do the same thing the bandsaw did and yank and slam the tube and almost cut my hands, speacially because its hard to secure the tube and the tube isnt very "stiff and rigid". I can easily make the tube flex, but its still very strong and durable not britle at all. The flex it has i think that causes the blade to BITE in really hard, kind of like feeding material into a router table from the wrong direction (ive done that also lol). 

 

Came here to say part it with a lathe. Next best bet - horizontal bandsaw - after that, PROPERLY done with a chopsaw with the correct blade. Then a tablesaw, with once again the correct blade and technique. After that maybe a jewelers saw and a proper jig?

I think your best bet would be looking for a local place with a horizontal bandsaw. Shouldn't be that hard to find. 

[ShadeTreeMechanic]

Use a hack saw with a 24 tpi blade. Don't cut all the way through in one spot. Just do a little, turn a little,do a little, turn a little. All the way around on your mark. You are trying to cut it too fast. The friction from cutting causes it to melt and then grab. If you lived any closer to me, you could bring it over and I would cut it for you.

[WalledSonic]

Came here to say hack saw and Shade beat me to it

[YukonXL04]

1 hour ago, ShadeTreeMechanic said:

Use a hack saw with a 24 tpi blade. Don't cut all the way through in one spot. Just do a little, turn a little,do a little, turn a little. All the way around on your mark. You are trying to cut it too fast. The friction from cutting causes it to melt and then grab. If you lived any closer to me, you could bring it over and I would cut it for you.

This. Same way we cut large diameter pipe. Just work your way around the pipe slowly. If it heats up and gets sticky move further down the cut line. Also cool your blade back off.