die grinders

[bigfootrules31]

okak, i just got a new die grinder kit to do some porting and stuff like that. i went to start porting an old whipper snipper for practice, and it chews alot of metal out. im using a fairly coarse bit. am i supposed to be using a stone bit or something?

 

[bigfootrules31]

also i have a victa that has a huge mukini on it, that needs a porting.
how much do i take out of the portz?

 

[frederic]

You use course tooling to remove lots of material and to get a general shape, then follow up with fine tooling *if* you want smoother bores in the runners, intake and exhaust.

The finer tooling is better for "blending".

How much you take off depends on the cam you're running and how much airflow your engine will suck in above stock. Big cams need big ports, but if you're running a stock cam you can in theory overdo the porting.

 

[brendonv]

I use a stone piece and it works great. I gotta port my victa as well, if u got the one where the port is on an angle u can only port the bottom half of the port. If u port the top it will go above the piston n f*** it up. Make sure u watch out for that.

 

[Rickracer]

Standard Abrasives has porting kits that have arbors and sandpaper rolls (what some call tootsie rolls), and a couple of different stones. Generally, use a coarse burr only for lots of material removal, finer burrs for close work, and tootsie rolls for finish work. Sometimes all you need is tootsie rolls. You can spend 100s of $$ on a good variety of carbide burrs, so choose wisely.

Speedway Motor has the kits pretty reasonable:

http://www.speedwaymotors.com/Porting-Kit,2622.html

 

[freakboy]

Ok this is what you do if your opening up the ports make sure its no bigger then your intake. Also intake needs to be a little rough unless you polish swirls in it. and exhaust you want as smoth as a babys ***. got all this info from my freind nate.

 

[jr dragster T]

got all this info from my freind nate.

Same guy that retards the cam timing 4-5 teeth?

 

[freakboy]

and acctualy gets it to run rofl. and i did post the linky

 

[bigfootrules31]

ok thanks, i did a bit more on it today and got a handle on it,. also is it bad to run die grinders at half revs ? my bro says that they wear out quicker.
and what oil do they need?

 

[Doc Sprocket]

Are we talking about a Dremel-style mini electric die grinder, or a fullsize, or a pneumatic unit?

I don't think speed's a concern. And if it's a pneumatic unit, then standard air tool oil is what you'll need. Otherwise a light machine oil in the bearings will be fine.

 

[Rickracer]

Half speed won't hurt either one, and will actually make the bearings in an air die grinder last a lot longer if you're cutting smoother. Air motor oil is what you need for air die grinders, and that's one tool that will probably need oiling more than once a day. I should know, I've gone through a bunch of them in the last 25 years, At one time when I was doing a lot of cylinder head porting, I had 3 straight ones and two 90° angled ones, I hated changing burrs all the time.

 

[bigfootrules31]

ok ill get some, i was using synthetis motor oil

 

[bigfootrules31]

my mighty victa has a big motorbike carby on it, i made up a angled piece of pipe with a plate on the end that bolts upto the intake. and it goes from big pipe, to tiny intake. do i port the **** out of it, or just a bit and taper the outsied to the pipes roundnes

 

[porsche930dude]

marvel mystery oil or ATF can also be used

 

[frederic]

I use an inline tool oiler, which I got off off ebay for $10 plus $5-6 for shipping. It doesn't hold a lot of oil but if you use power tools a lot you'll have to fill it up maybe once a week tops. A couple of years ago I was experimenting with fiberglass and spent an entire day sanding the bondo I skimmed all over the place trying to fix imperfections. My air sander ran probably about 6 hours that day out of the 14 hours of project time, and the tool oiler still had a little left.

Like PorscheDude, I use ATF. I'm cheap so I pour in used ATF

If you're going to use a tool oiler I do recommend that you put a "T" fitting just before it with a female quick-connect so you can tap the air supply just before the oiler if you do any painting. Use an air hose that's never been used with oil. Oil and paint, well, you know ... "fish-eye" city.

 

[freakboy]

What type of oil would be good for a angle grinder? i just bought a brand new ryobi grinder today for 40 bucks and i wana make sure it dont go even tho it has a 3 year warenty.

 

[bigfootrules31]

i didnt think angle grinders needed oiling??? my grandad has had the same grinders and drills since he was young, now my dad has them and theyve never been oiled before.

 

[freakboy]

alright i just keep the box sitting in my room with the head facing down i hear its good for it cause the grease oozes down in the gears.

 

[Doc Sprocket]

Having beaten the wee out of many angle grinders over many years, I try to extend thier life by periodically re-greasing the gears and oiling the bearings...

 

[jr dragster T]

I use an inline tool oiler

What happens when you need to sandblast