da sandpaper ?

rustover

rustover

Member
Finally purchase a nice da sander 3/16 orbit, with a 5 inch pad. It came with a psa pad and I've been looking at sandpaper to use. I've looked at so much sandpaper that my head is spinning!

I mainly got this to try out the trizact system later down the road.

I know the trizact uses a foam interface pad. Do you guys use this for any of the coarser grits? I can see where it would help around different shapes of the car.

Also looking at the hook and loop paper alot of it has holes in it, I'm guessing for dust and clogging purposes. I know the hook and loop takes a special pad but I'm also guessing the holes in the paper need to line up with the pad?

I just wanted to ask what you guys are using. I know there is alot of products out there. I guess I mainly don't want to use something that belongs in a wood shop on my car.

I mainly have used my old da with psa indasa paper for surface prep for epoxy and cutting the top layer of slick sand. After that I'm block sanding.

Thanks for the help. Russ
 
We use 6" discs from 40 up to 600 for various tasks, mostly for stripping or sanding paint or filler, very rarely for primer on a flat area that is not critical from a quality standpoint.DA can put waves in primer pretty easily. Knocking off the top layers is OK though.
 
I almost always use a soft interface pad. If im stripping or cutting down filler is the only time i dont. Crash is right, the automotive industry uses 6". 5" is wood and marine. Its going to be very hard to find 5" and most paper we use isnt even available in 5". Your going to need to get a 6" backup pad for your sander
 
Thanks guys. I may have messed up. I'm not sure if this sander will work with a 6 inch pad. I will have to find out. The counter weight may be specific. I can get the trizact stuff in 5 inch, so I may just use it for that, and stay with the 6 inch for everything else.

What's your thoughts on the self generated vac da sander 3m 20327?
 
i have 3 of those sanders. they are great but dont bother with the dust bags. those bags last all of 2 min before they are clogged and dont work. i took a rubber plug and put it in the end of the sander to keep it from sucking up and blowing dust all in the air. you can change from a 5" to 6". yes the counterweight is different but i have switched back and forth with many of my sanders and i never saw a difference in vibration. doesnt matter anyhow because when you put on a soft interface pad or a different model backup pad it theoretically throws that out of whack also. just change it over. you will be fine.
 
I use an electric DA with holes attached to a vacuum for stripping, rough work, and non-automotive stuff. The holes catch a lot of debrit that will show up as swirls and sctratches. Therefore, I wouldn't recommend using it for finish work.
 
So I decided to take a 6 inch piece of paper and cut it down to fit this sander just to try it. I do plan to get the 6 inch pad and interface, but the 5 inch can get into some areas that you couldn't get a larger da. Wow what a difference, I used it for about 15 minutes cutting the first layer of Slick Sand down. My hand no longer has that tingling/numb feeling.

I do have a stupid question. The reviews on this sander said that you had to oil it or you would burn it up. I noticed the first time using it that is did throw some oil out on my surface, so I had to stop and continuously clean the panel until it stop.

So my question is "Do you guys oil your da's. If so I guess we are just talking about a very small amount maybe 3 drops? I never oiled the old one, but if it died I would not have been that upset. Thanks, Russ

 
never oiled mine. use them daily for the past prob 5 years. i got them when 3m first started producing them. i have also had dynabrades. two being about 25 years old now. they have never had oil either. they seem to last forever.
 
Never oil mine, either. Doesn't seem to be an issue.

I remember buying a yellow Snap-On DA about 5 years ago that never did quit spitting out little drops of oil, even after many months of use. Sold it back at a big loss, what a stupid waste of money that was. I think Snap-On sources their DAs from Dynabrade these days, though, so they are probably a lot better.
 
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