Hi everyone, wanted to ask few questions to guys who are using cut off saw's for cutting merge collectors...

1) How thick is your 14" cut off wheel???

2) With what tool you grind off the burned steel that is stuck to the pipe you cut? I'm interested in this cause after today's attempt to cut tube, I just had so much trouble grinding off those burned steel things hope you all get what I mean

Is this the tool for that job? http://instrumenti.lv/images/items/bVV06LxLRTC.jpg I asume you ues this to port out the merge collector when welded to flange or head flange, right?

P.S. maybe someone could take more detailed pics of chop saw jig setup?

Thanks guys

 

I use that with a double cut carbide deburring bit.


I also bought the northern dry cut saw and I love it compared to the abrasive bladed saws

 

Does that Northern Hydraulic dry-cut come with a blade? I'm thinking of buying one next time I have to work on steel tubing, but for aluminum tubing a miter saw seems to work fine.

 

yea, it comes with a blade. Stays cool too.

 

Thanks!

 

Ok guys, I really need some inputs... cause I got 1/8" thick cut off wheel, and cutting with it is awfull... Today tried to cut collector from .079" wall 1.58" tubes, and it was awfull, nothing is that bad :D

Here you can see a pic, not the best, but will do

You can see the burned, grinded, not cutted, steel bended inside the tube...



And the first thing that s*cks is the start, when wheel meets tube, if I put some weight/power on wheel, it kinda moves to the right, and cuts there, cause it can bend/move kinda like this - /\....

Just want to know, how thick wheels are you, who have cut pipes/tubes for collectors, using?

And if you have the same "grinded" type of steel inside or somewhere on the pipe, with what tool you remove it?

Thanks

 

That thickness should work out ok. One tip with cutting angles like that with a chop saw is to start slow and easy until you have a notch, then apply more pressure. This will help with blade walking.

Here are the tools I use for porting/cleaning collectors. Mostly steel bits but a worn aluminum bit works wonders on fast material removal.



For abrasives Ive found that ceramic blends work amazing on stainless and tend to last much longer than the normal run of the mill aluminum oxide stuff. This applies to sanding belt, cartridge rolls, cut off wheels ect.

 

Thanks for replay man

Yeah, I tried to start out slow and easy, but it took a year until it just started to make a notch Tomorow will take my time and do it as I should, will wait, and do it slow and easy I really hope it will work out

And about those burned steel bits... You have them too, and then you grind them off with those tools right? Yeah... I'll need to save up for those grinding tools...

I found this grinder for 22$ here in my county,



is it worth buying, or should I save up a bit more and buy something more expensive?

 

itll last you longer than you need it. dont go overboard on a litlte dremel grinder like that. we have had our harbor freight ones for about 9 years now. oil them and theyll last forever.

 

No problem. Yeah slow and easy is the best way with a chop saw. Are you making 4-1 collectors?

I use a wet bandsaw for all my collector cuts. I still get some burs inside but they clean out pretty easy with the tools I have. As for the die grinder you want to buy, well, a cheap tool is a cheap tool, depends on how you need it to perform. I do this for a living so i try to buy the best I can. Good tools are worth their weight in gold and you'll find with air tools the better quality you buy the more powerful they are and actually use less air sometimes. The bits get a little expensive, expect to pay around $20-30 each. I do recommend you use a high quality oil and try to keep your air supply as moisture free as possible to extend the life of your air tool.

 

Ok, than will try that one for first time, maybe it'll last me 9 years as well

yeah, I'm trying 4-1 for now...

Here is a PVC collector I made today, 1.58" O.D. PVC pipe, 2.5" long each, 20degree angle cut, ~94degree turn from first cut. This is the actual setup I will be making for my first manifold build in near future - mini ram horn d series Only from 1.66" O.D. sch10 mild pipe





After this PVC collector was made, I tried it from tubing, and it didnt coma out well, because of wheel walking, they were cut in less then ~94 degries, and collector had a hole in the middle

P.S. your collector looks sweet

 

And for those bits... which would be nice all purpose bit for start? Cause I want to buy one for start, as they really cost 20-30$ here too I think I will buy one like second from right in your picture I think it will be nice all purpose mill

 

Today I bought this die grinder for myself



and also bought new cut off wheel - 12"x3/32"x1", at least that was written on the wheel When I checked it, it actually was .102" thick... but thats also better then my 1/8, so

And also tried once more today to cut and make collector, and again, it failed... The new wheel/disc was much better, not perfect, but much better than my 14" 1/8 thick wheel... but even with me going easy and slow, I could not make it with 94 degrees... there was too many room in the middle of colector, so tomorow I will try 98 degrees, hope that'll work

Here is a pic of tubes cutten:



And I have one more question: here is a picture of two bits for die grinder, they both are pretty much the same design, both are on 1/4 rod base, but one is bigger than the other, which one should I buy, the big one, or a little smaller one, which is on the right in picture?



Thanks

 

This is why I went carbide cut-offs. I used the abrasive kind for almost 20 years in industry.
They take no abuse and wander.
Buy the larger carbide burr. More surface area, will work better.
A cone stone might be better, I would try both to see which is more cost effective in terms of time and money spent.
Have fun!

 

Tungsten carbide wheel(if thats what you mean) would be great, but it costs 150$ here, and as I'm not earning any money with this(hope I will), I really dont want to spend that much I've seen videos in youtube, that wheel really seems awsome

Ok, will buy the bigest one its 24$ here and if by "cone stone" you mean this type of burrs



I have few of them a little package with 4 of them costs 4$ here

Thank you once more 9bells

 

Today tried to cut PVC collector with 98 degree turn, and it came out pretty good:





Then tried the same thing with 1.58" O.D. tubes, with 0.79" wall, 98 degree turn They didnt come out as good as I've wonted them, but maybe doable dont know...





Here are both together:



of course, I would want to perform better... I really cant understand, why I'm not able to make a good collector out of tubes...

Maybe someone could give me some tips????