I've an exhaust manifold off an AEG 8v. It's tubular. The welds for the flange to the cyl. head are on the inside of the ports and take up a pretty good bit of space. I want to grind these welds down, and a dremel seems to be the best tool for the job. I just don't know what grinding bit would be best. The dremel website says that an Aluminum Oxide stone works well on most metal including stainless steel. Would this be a good bit to use or is there something better?
grinding welds with a dremel?
reynolds9000
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I've an exhaust manifold off an AEG 8v. It's tubular. The welds for the flange to the cyl. head are on the inside of the ports and take up a pretty good bit of space. I want to grind these welds down, and a dremel seems to be the best tool for the job. I just don't know what grinding bit would be best. The dremel website says that an Aluminum Oxide stone works well on most metal including stainless steel. Would this be a good bit to use or is there something better?
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Re: (weiRtech)
I have an 80 gallon air compressor but no die grinder, so i guess i'm SOL with that option.
Can you get carbide burr's at Sears?
I have an 80 gallon air compressor but no die grinder, so i guess i'm SOL with that option.
Can you get carbide burr's at Sears?
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Re: (reynolds9000)
WTF?
![Image]()
They're about $7 from Harbor Freight Tools if you get them on sale. Buy two, they're handy.
Think of it this way: you're going to spend forever and a day grinding welds with a dremel (and probably burn it up). What's your time worth?
Edit: They're $9.99 plus shipping right now, and one even comes with an assortment of stones for that price. I agree with the other guy though, carbide burrs are the way to go. They cost more $$, but again, they'll save you time. Google "carbide bur(r)" and go to town.
Modified by benny_mech at 1:57 PM 12-2-2008
| Quote, originally posted by reynolds9000 » |
| I have an 80 gallon air compressor but no die grinder |
WTF?
They're about $7 from Harbor Freight Tools if you get them on sale. Buy two, they're handy.
Think of it this way: you're going to spend forever and a day grinding welds with a dremel (and probably burn it up). What's your time worth?
Edit: They're $9.99 plus shipping right now, and one even comes with an assortment of stones for that price. I agree with the other guy though, carbide burrs are the way to go. They cost more $$, but again, they'll save you time. Google "carbide bur(r)" and go to town.
Modified by benny_mech at 1:57 PM 12-2-2008
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Re: (benny_mech)
I should specify that the air compressor is my works compressor, and we have a lot of air tools, but no die grinder. I had no idea they were so cheap! We have a harbor freight in town so maybe i'll just take a stroll through and see what they've got.
Hopefully it'll be on sale at the store!
I should specify that the air compressor is my works compressor, and we have a lot of air tools, but no die grinder. I had no idea they were so cheap! We have a harbor freight in town so maybe i'll just take a stroll through and see what they've got.
Hopefully it'll be on sale at the store!
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Re: (reynolds9000)
Will one bur be enough? I've never used one so i don't know if they wear down or dull out. I know carbide is some strong ****, but i've got 4 ports to do and the welds are kind of thick.
At $25ish for one, i really hope i don't need more.
Will one bur be enough? I've never used one so i don't know if they wear down or dull out. I know carbide is some strong ****, but i've got 4 ports to do and the welds are kind of thick.
At $25ish for one, i really hope i don't need more.
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Re: (reynolds9000)
would this be ideal? there a few shapes, seems like this would be good because it's got a lot of flat surface.
![Image]()
would this be ideal? there a few shapes, seems like this would be good because it's got a lot of flat surface.
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Re: (Agtronic)
Ok so the one pictured is double cut? I only have 4 ports i need to open up, i'm not sure how long these carbide bur's last, but if i can get one that will last for all 4 ports that would be awesome.
Ok so the one pictured is double cut? I only have 4 ports i need to open up, i'm not sure how long these carbide bur's last, but if i can get one that will last for all 4 ports that would be awesome.
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Re: (reynolds9000)
Found a single cut one.
![Image]()
Looks like they're pretty stout.
Found a single cut one.
Looks like they're pretty stout.
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Re: (reynolds9000)
That burr is for non-ferrous materials (ie: not steel). Great for aluminum.
That burr is for non-ferrous materials (ie: not steel). Great for aluminum.
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Re: (84_GLI_coupe)
ok, what about this? I've already learned this is single cut. Now, will it cut steel?
![Image]()
ok, what about this? I've already learned this is single cut. Now, will it cut steel?
Re: (reynolds9000)
Yep, that one looks fine for cutting steel...assuming it's made of the right material. Carbide burrs work great on steel. The non-ferrous burrs have large flute spacing to decrease your chance of clogging the tool. The ferrous burrs can be used on non-ferrous, but you'll have to stop and clean them out quite often. The non-ferrous should not be used on ferrous materials - they'll wear out quickly.
Yep, that one looks fine for cutting steel...assuming it's made of the right material. Carbide burrs work great on steel. The non-ferrous burrs have large flute spacing to decrease your chance of clogging the tool. The ferrous burrs can be used on non-ferrous, but you'll have to stop and clean them out quite often. The non-ferrous should not be used on ferrous materials - they'll wear out quickly.
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Re: (Agtronic)
I've never had them heat up much at all. In fact they stay surprisingly cool whenever I've used them. I agree about the double cut ones and abuse. They'll tend to grab the part and jump, bouncing the bit off the other wall and chipping the hell out of them. All of them require a tight grip on the tool, but once you get used to it you'll be fine. I actually prefer the double cut ones for cast iron and steel, but the single cut ones do leave a finer finish. If you treat those burrs right they'll last a very long time. I have yet to wear one out. http://****************.com/smile/emthup.gif
Edit: The "flame" is my preferred shape. It's easy to gouge softer metals with the sharp corners on the other shapes.
![Image]()
Modified by benny_mech at 9:46 PM 12-2-2008
| Quote, originally posted by Agtronic » |
| Those work great, but don't abuse the double cut ones, they will wear out quick. The single cut ones can take more abuse. Make sure you keep a little glass of water, and cool it down regularly as you cut. |
I've never had them heat up much at all. In fact they stay surprisingly cool whenever I've used them. I agree about the double cut ones and abuse. They'll tend to grab the part and jump, bouncing the bit off the other wall and chipping the hell out of them. All of them require a tight grip on the tool, but once you get used to it you'll be fine. I actually prefer the double cut ones for cast iron and steel, but the single cut ones do leave a finer finish. If you treat those burrs right they'll last a very long time. I have yet to wear one out. http://****************.com/smile/emthup.gif
Edit: The "flame" is my preferred shape. It's easy to gouge softer metals with the sharp corners on the other shapes.
Modified by benny_mech at 9:46 PM 12-2-2008
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Re: (nmrado)
That is the photo of one i found on ebay and is carbide.
Is carbide short for Tungsten Carbide or is there a difference between that and just carbide?
It's $7 w/ free shipping so you can't really beat that.
That is the photo of one i found on ebay and is carbide.
Is carbide short for Tungsten Carbide or is there a difference between that and just carbide?
It's $7 w/ free shipping so you can't really beat that.
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Re: (reynolds9000)
So i should be able to get by with just one bit? For $7, i might as well pick up two just in case.
So i should be able to get by with just one bit? For $7, i might as well pick up two just in case.
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Re: (reynolds9000)
Tell you the truth I'm not sure on the Tungsten vs. Carbide, but I had thought it was the same thing. One ought to last you just fine for what you're doing. If you buy two, you might get different shapes and keep them for future use. Once you start porting, you don't stop.
![Image]()
| Quote, originally posted by reynolds9000 » |
| That is the photo of one i found on ebay and is carbide. Is carbide short for Tungsten Carbide or is there a difference between that and just carbide? It's $7 w/ free shipping so you can't really beat that. |
Tell you the truth I'm not sure on the Tungsten vs. Carbide, but I had thought it was the same thing. One ought to last you just fine for what you're doing. If you buy two, you might get different shapes and keep them for future use. Once you start porting, you don't stop.
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Re: (benny_mech)
Ok cool. I'm going to get this one off ebay, it's only $7. Does that sound too good to be true? I know with tools it's 'you get what you pay' for, but if it's carbide it's carbide right?
It's a single cut cylindrical end cut like the aluminum cut one i posted earlier.
Ok cool. I'm going to get this one off ebay, it's only $7. Does that sound too good to be true? I know with tools it's 'you get what you pay' for, but if it's carbide it's carbide right?
It's a single cut cylindrical end cut like the aluminum cut one i posted earlier.
i've bought burrs off ebay before. they work fine and are cheap. i never really use anything to cool it down while grinding, but when i do aluminum i spray some wd40 on it occassionally to prevent the aluminum from gumming it up. i suppose you could do the same on steel.
double cut, single cut, either one will get the job done.
as for which die grinder, for $10 i wouldn't expect it to last more than a month. i've used cheap ones and they never last. spend atleast $100 on a decent one that will last you.
double cut, single cut, either one will get the job done.
as for which die grinder, for $10 i wouldn't expect it to last more than a month. i've used cheap ones and they never last. spend atleast $100 on a decent one that will last you.
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Re: (weiRtech)
Honestly, as long as it will let me get this porting job done, i'll be happy. It's only $10 so why not, ya know? I don't really expect it to be the best, i'm not any kind of professional, just looking to save some money by not paying to have someone do this for me.
Modified by reynolds9000 at 1:12 AM 12-4-2008
Honestly, as long as it will let me get this porting job done, i'll be happy. It's only $10 so why not, ya know? I don't really expect it to be the best, i'm not any kind of professional, just looking to save some money by not paying to have someone do this for me.
Modified by reynolds9000 at 1:12 AM 12-4-2008
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