Best burr shape for porting?

[af2]

It seemed Joe Mondelo liked the Mikita GEO600 grinders, it also appears they've been discontinued? Has anyone had any experience with the clones offered on eBay? One listing that's ended noted that parts are interchangeable? They practically give them away.

SKeown

I still have mine and they are still around if you look. The 600 is by far the best electric IMO. With the peddle it runs like a sewing machine!

[rookie]

I'm about out of questions, but I do have a couple more. Has anyone actually used a Foredom flex shaft setup for porting type work, is it actually strong enough to drive 1/4" shank burrs? I understood that unless you used the aluminum cut type burrs, they would clogg up with material, is that not the case?

SKeown

I Do! would u like a photo?
I have always used mine dry oil may help but is messy...dry u do have to stop and knock off any stuck on pieces.

I live in Texas as well (Princeton) your welcome to come here and ck it out for your self.

[SKeown]

I'm about out of questions, but I do have a couple more. Has anyone actually used a Foredom flex shaft setup for porting type work, is it actually strong enough to drive 1/4" shank burrs? I understood that unless you used the aluminum cut type burrs, they would clogg up with material, is that not the case?

SKeown

I Do! would u like a photo?
I have always used mine dry oil may help but is messy...dry u do have to stop and knock off any stuck on pieces.

I guess those burrs produce a smoother job too? Yes, a picture would be nice. Where is Princeton? I live near Beaumont.

SKeown

[rookie]

I'm about out of questions, but I do have a couple more. Has anyone actually used a Foredom flex shaft setup for porting type work, is it actually strong enough to drive 1/4" shank burrs? I understood that unless you used the aluminum cut type burrs, they would clogg up with material, is that not the case?

SKeown

I Do! would u like a photo?
I have always used mine dry oil may help but is messy...dry u do have to stop and knock off any stuck on pieces.

I guess those burrs produce a smoother job too? Yes, a picture would be nice. Where is Princeton? I live near Beaumont.

SKeown

I'll pm you for your email..for photo.
http://maps.google.com/maps?oe=utf-8&rl ... CD0Q8gEwAg

[cpmotors]

I'm on the verge of collecting two burrs for port matching an aluminum manifold. I realize the ones specific for cutting aluminum are needed, along with a short & long shank. What I need advice on is the best shape, there are many to choose from such as round nose conical, round nose tree, egg shaped and so on. I know to be properly setup to do such work full time a person should have a complete variety, but I'm just doing one manifold.

Thanks, Steve

SE-5L6 in Alumacut for roughing and larger radius
SE-3L6 in Single cut for finishing and smaller radius
http://www.carbideselect.com/se.php

FWIW- for what your doing, buy a common air die grinder for $35 and be done, gets the job done just fine. Learn some speed control and patience waiting for the AC to keep up.
I went to a GDO-601 about a year ago- should have done it sooner. The SE-5L6 may want to start with a wobble (in the GDO), just lay the shank lightly on a pc of wood as you start it and it gets past that rpm where it wants to vibrate. I use it at full bore, cuts thru CI like nothing I only use the air grinder now for sand rolls at low speed and some chamber work.

[SKeown]

Thanks for the tips! I choose a more economical grinder, it should do one manifold and appears the same as a Mikida GEO600. I like the 11 1/2" size and will likely use a foot or router speed controller with a 6" single cut burr shortened a couple of inches. When you get to be 66 years old, you realize seeking the best is foolish, even though I love quality tools.

http://www.ebay.com/itm/310386296348?ss ... 1423.l2649

SKeown

[larrycavan]

Get yourself one of these if you are going to use an electric grinder with long bits. It is not professional quality but it will keep you out of the hospital.

http://www.harborfreight.com/router-spe ... 43060.html



Enjoy.

Rob

I bought one of those and it didn't work very well. Wouldn't slow down the grinder near as much as I would have preferred. I bought a Foredom foot pedal controller after that. It's better but I'm having a hell of a time trying to get comfortable with it. I don't like to port sitting down and the foot pedal controller pretty much forces that issue.

If you want a Foredom pedal, they're available on Ebay for a very fair price.