What dremel to buy?
10-06-04, 09:08 AM
#26
TEAM MAZDA
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I have used BOTH a dremel and a die grinder. PERIOD, POINT BLANK ! ! !
What part of that dont you understand?
dremels suck and they are slow . . .
Hmm, do you want to use a house wifes tool for a mans job or do you want to use a heavy duty industrial tool?
Right tool for the right job ! ! !
What part of that dont you understand?
dremels suck and they are slow . . .
Hmm, do you want to use a house wifes tool for a mans job or do you want to use a heavy duty industrial tool?
Right tool for the right job ! ! !
10-06-04, 09:18 AM
#28
Right near Malloy
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Originally Posted by Rx7carl
The dremel might be barely adequate for the exhaust ports, but you'll never port the irons with it. If you dont have or want a compressor and a hi speed grinder, use an electric one with a flex shaft. Even harbor freight has one at a decent price. And use carbide bits, especially on the irons. They'll last alot longer than the cheap junk thats out there. I like the double cut bits as they cut faster and are less prone to clogging (especially important on aluminum). Go read over on nopistons about porting, lotsa wisdom there guys.
It's item 40432-0VGA
Last edited by Pele; 10-06-04 at 09:24 AM.
10-06-04, 02:16 PM
#29
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Slower spinning will grab and jerk, wont be smooth.
fast spinnig is clean and crisp cuts through any metal like warm butter alot easier to control! It wont build up in the bits either, unless you use cheap ones. Got to use Carbide cutting bits . . .
If you want a die grinder to spin slower you can have that too, if thats what you want? Turn down the air pressure.
SAFETY = EYE PROTECTION got to use that for either one, unless you dont value sight!
fast spinnig is clean and crisp cuts through any metal like warm butter alot easier to control! It wont build up in the bits either, unless you use cheap ones. Got to use Carbide cutting bits . . .
If you want a die grinder to spin slower you can have that too, if thats what you want? Turn down the air pressure.
SAFETY = EYE PROTECTION got to use that for either one, unless you dont value sight!
10-06-04, 02:19 PM
#30
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"dremels suck and they are slow . . ."
I meant slow as it takes forever to do any amount of damage ! ! !
Damage meaning porting the **** out of the engine. not destroying anything . . .
I meant slow as it takes forever to do any amount of damage ! ! !
Damage meaning porting the **** out of the engine. not destroying anything . . .
10-06-04, 02:22 PM
#31
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Perhaps this goes without saying, but don't use the $10 dremel clone that harbor freight has. It's okay for small tasks (I've used an alum. oxide bit to grind out bearings, and to cut, shape, and smooth small bits of light metal), but it'll "grind" to a halt if you apply any real pressure to the material with the bit.
10-06-04, 04:17 PM
#32
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Thought I would pour some fuel on the fire....
I have a variable speed dremel (well had one, someone "borrowed" it about 3 years ago and hasn't returned it) It will go thru SOFT metal with some patience, however it will not go thru any decent amount of hard metal. They are designed for light duty metal work, wood work, and plastics. If you want to know how well they go thru metal, it take about 7 minutes to cut thru a 10mm bolt with a cut-off wheel and about 30 minutes to "grind" the head off of the same bolt.
dennis
I have a variable speed dremel (well had one, someone "borrowed" it about 3 years ago and hasn't returned it) It will go thru SOFT metal with some patience, however it will not go thru any decent amount of hard metal. They are designed for light duty metal work, wood work, and plastics. If you want to know how well they go thru metal, it take about 7 minutes to cut thru a 10mm bolt with a cut-off wheel and about 30 minutes to "grind" the head off of the same bolt.
dennis
10-07-04, 11:48 AM
#35
Here is a little advice from an engineering viewpoint. I'm a mechanical engineering student at Purdue and In our processes and machining class we talked quite a bit about how to produce a desired finish on a machined part. The smoothness of your finish depends on two factors, the speed of your cutter, and the depth of your cut.
Essentially you can look at it like this:
Finish = (speed of cutter) / (depth)
A higher number denotes a smoother finish. The faster your cutter is going the more material you can remove and still obtain an adequate result, (based on the formula). Obviously if you have a slow cutter and a higher depth of cut, your finish is going to look like crap because of all the "chatter" that is going to occur. So knowing nothing about the dremel vs. die grinder controversy I am going to advise that you choose the higher speed tool and press lightly when doing your porting. I know a lot of times a dremel will bog down when you press on it too hard, because it doesn't have the umph to keep up. This is going to be deadly to your finish because you are going to lose cutting speed. At the same time you will be pushing harder to make up for your lost cutter speed. Without realizing it you will be trying to remove the same amount of material with a lower cutter speed. If you are going to use a dremel make numerous small cuts to yield a smooth finish at the end. Personally I would use the die grinder, but I can definitely see why some of you may not want to. Hopefully this helps somehow in your decision.
Essentially you can look at it like this:
Finish = (speed of cutter) / (depth)
A higher number denotes a smoother finish. The faster your cutter is going the more material you can remove and still obtain an adequate result, (based on the formula). Obviously if you have a slow cutter and a higher depth of cut, your finish is going to look like crap because of all the "chatter" that is going to occur. So knowing nothing about the dremel vs. die grinder controversy I am going to advise that you choose the higher speed tool and press lightly when doing your porting. I know a lot of times a dremel will bog down when you press on it too hard, because it doesn't have the umph to keep up. This is going to be deadly to your finish because you are going to lose cutting speed. At the same time you will be pushing harder to make up for your lost cutter speed. Without realizing it you will be trying to remove the same amount of material with a lower cutter speed. If you are going to use a dremel make numerous small cuts to yield a smooth finish at the end. Personally I would use the die grinder, but I can definitely see why some of you may not want to. Hopefully this helps somehow in your decision.
Last edited by Glazedham42; 10-07-04 at 11:52 AM.
10-07-04, 11:55 AM
#36
Airflow is my life
Originally Posted by Pele
Can anyone suggest an affordable alternative... Somehow I don't think the Harbor Freight one I mentioned above will cut it.
Well thats the one I was looking at. Its got a 1/4 hp motor w/ball bearings. 15,000 rpms is plenty. Eh, just looked and the chuck is 5/32. I would want a 1/4" chuck. Ask Sterling. He has a grinder of this type (but a high quality one) he uses for his jewelry. He sent me a link but I lost it.
10-07-04, 01:07 PM
#37
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What do you guys think about mini die grinders. I've never owned one but do they have adequate power for porting? They would seem easier to handle for more precise work. Plus its cheaper too. About $30 or under. Any inputs?
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