RTS 400 EQ Orbital Sander

  • Thread starter Thread starter Rob Z
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Rob Z

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FYI for anyone wanting to buy a sander that will work with the dust extractor, and to be able to sand plaster and drywall inside the customer's house with VIRTUALLY NO DUST escaping ......

The RTS 400 EQ is fantastic.  I talked to Tom B. at tool-home.com and asked for a recommendation for a sander that would be light enough to use overhead and smooth enough to get drywall and plaster sanded to a point where it is ready for primer and only needing maybe a quick touch with a sanding sponge in a few spots. We used 220 Brilliant paper and turned the airflow down on the vac as per Tom's suggestion.  This enables the sander to float more easily across the surface.  I'll let Tom stop in  and explain the ins and outs of this technique.

Our job we just finished involved repairing the huge hole in the ceiling (approx 4' X 5') below the leaking shower that we rebuilt upstairs.  We floated in plaster to finish off the hole, and then skim coated the cement board in the bathroom upstairs (the owner wanted cement board outside of the shower, with plaster skimmed and painted).

My employee sanded all the plaster in both areas ( a total of about 40 sq ft) without a dust mask on and zero dust on his clothes or skin.  One sheet of paper was good for the entire sanding job.

Tomorrow, he goes to another job to sand and prep the walls in the kitchen for a backsplash tile job that we will start next week.  The previous contractor really botched up the walls doing the kitchen remodel, so we need to do a lot of prep on the drywall without making a mess in a functioning kitchen which is right next to the living room.  The alternative would be to tarp everything off with plastic and run our negative air machines, which would involve a lot of set up and tear down labor.

Conclusion:  a big thumbs up for the RTS 400 sander.
 
+1 for Tom at Tool-Home!

I have to decide on a sander/vac combo to pick up soon.
 
It's nice to know that a suggestion works so well. One reason the RTS 400 is such a good sander for ceilings is that it is light. Another reason is that it is an orbital so it doesn't have any tendency to "fling" the dust that a random orbital might.

I'm assuming Rob was referring to the following technique of adjusting the CT:

1. Run the sander with the abrasive of choice and on the surface you are planning to sand with no vacuum applied. This lets you to know how the sander reacts and sounds without vacuum.
2. Apply full vacuum and on a sander that can't take full vacuum (and the RTS 400 can't), you will notice that the sander sounds labored and normally gets jumpy.
3. Turn down the vacuum until the sander sounds and feels like it did in step number 1.

I've stated it before but my observation is that 150 mm diameter Festool sanders with a CT 22 or CT 33 and a 27 mm hose can handle full suction but smaller pad sanders can't.

Tom
 
I've never used a finishing sander that I thought was very good but the RTS 400 changed that. It sands reasonably fast, dust collection is excellent, just an allround excellent tool. I'm really happy that I bought it.  I'm using it tonight to smooth out some old paint and will be using it next week for final sanding on some cabinets I built.
 
Update:  it has been about 2 1/2 months that we have been using this sander, mostly on plaster  (real plaster, the hard stuff), many times in occupied rooms (furniture, people, electronics, etc) ....and the results are fantastic.  This tool has paid for itself many times over.  My budget for respirators has gone way down now that sanding can be done without needing a mask!
 
I have the option to buy a used Festool RTS400EQ sander for approx 150USD. I was thinking of using it for finishing drywall plates. Is this sander the right tool for this? BTW, in Norway this sander costs approx 600 USD.
 
roar said:
I have the option to buy a used Festool RTS400EQ sander for approx 150USD. I was thinking of using it for finishing drywall plates. Is this sander the right tool for this? BTW, in Norway this sander costs approx 600 USD.

It works great on drywall. However, if you got a big surface to sand I'd go for a bigger sander. But I've used the RTS400 for leveling out plaster walls and the seams between drywall plates with great success. 
 
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