View Full Version : Opinions on Grinders and Buffers


Kleantouch
04-06-2005, 10:04 PM
Well, I've decided to buy a welder, to complement my paint gun- but in order to grind down the welds that I will make, I need an electric grinder- Any opinions on which one is the best?

Then, after I grind, I paint- Since I haven't painted anything but singlestage, I want to go BC/CC, but don't khave a buffer- again, any opinions on which brand is the best?

Also, if you have a model #, it will make my serch that much easier. While I want to get real good stuff, the less i pay for tools, the more I can pay for body panels and paint!
Thank,
Carl

>X<
04-06-2005, 11:33 PM
as long as you go with a GOOD brand you'll be ok for elec grinder. not black and decker or somethign like that- get something that will last forever like a dewalt, milwaulkee, makita, porter cable, etc. i have a milwaulkee, took the place of 2 dewalts that broke. it has the trigger that extends to the back so you can reach with it and keep your hands away, and if you let go it turns off. feels alot safer than the kind with an off/on button. i think dewalt makes one with the same handle trigger too. (Sears has most of the good brands). i would get an air angle grinder if you plan in doing body work with the welder. they are cheap, work better than a grinder, and dont make near as much heat. everybody makes one, but get the 3m roloc kit for it so you can use all the cool sanding stuff that 3m makes.

Steve N 69 69 69
04-07-2005, 04:32 AM
I have a 4" makita. but I think 4.5" discs are more available.
I like the lock on button for the power, so I can put the tool in a vice to work on little parts with both hands, on areas that are too hard to get to on the bench grinder.
Also the button that locks the motor from turning makes it easy to change discs, usually without any tools.
Millwalkee makes nice stuff too.

LONGHAIR
04-08-2005, 06:59 PM
I'm with >X< on this one. An air grinder works better, assuming that you have the compressor to run one, they are air-hogs. They are lighter and easier to control. Also, for weld grinding, I generally use my air powered cut-off wheel first. It cuts quick (less heat) and then blend with a Roloc disc on an angle grinder. I use 24, 36 and 50 grit Rolocs, depending on application. I I was forced to only use one it would be the 36. 24s cut quick, but they seem to "go-away" faster than the others. 50s finish nicely but they really don't "cut" very well. You will "polish the top of the bump" rather than remove it.
It doesn't do you any good to be very careful of heat in your welding and then over-heat in the grinding process.
Those big electric grinders can be hard to get into tight spaces too.

jamis
04-08-2005, 07:40 PM
I usally buy the cheap harbor frieght angle grinders, they dont last more the 1 project, but since every project last me a couple of years, I'm ok with that.
Longhair what is Roloc? Are those the disc that look like scotch bright pads that can be used on die grinders. I have those and the nini discs that screw on to the die grinder pads. But they go by another brand name.

LONGHAIR
04-08-2005, 08:53 PM
Roloc is just 3M's brand name for the 3" discs that screw onto a rubber backing pad. I have a few different diameters of backers. The smaller ones allow you to "bend" the pads a bit more...they fit concave bends better that way. I usually just grind the backers to smaller sizes.

I have used the "scotch-brite" type pads, they are ok for some mild blending but seem to be better suited for working on parts that will be polished or plated.

jamis
04-10-2005, 10:15 PM
I bought some of the 3m roloc products to try out and they work nice, thanks for the info.
besides the sandpaper disks, I also bought this plastic bristle do-hickies(already forgot what theyre called) that work nice for just removing paint.

mastercraftkpk
04-11-2005, 10:19 AM
I just bought the Porter-Cable electric DA sander/polisher form Lowe's for less than $120.00. It has 6 speed settings and 6000 rpm is max.

Used it to buff out a boat over the weekend and I LIKE IT. It has plenty of torque, is not very heavy, and is well balanced. Plus, it is electric...so it isn't an air hog. I got tired of waiting on my compressor when I had a lot of sanding to do.