6" vs 5" ROS

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Forum topic by moke posted 10-17-2016 05:21 PM 248 views 0 times favorited 5 replies Add to Favorites Watch
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847 posts in 2195 days

10-17-2016 05:21 PM

I recently read an article that 6” ROS are 40% more efficient than 5”. What is everybodies experience? I have 3 three 5” ROS, all Porter Cable, but now that I hear this the Bosch 6” is catching my eye….I hate sanding so if I could shorten the time, that appeals to me.
I searched for previous posts but could not find anything…..

5 replies so far

View Carloz's profile


49 posts in 10 days

#1 posted 10-17-2016 06:43 PM

From a theoretical point of view A 6” sander has 44% larger area than A 5” sander. But 5” sander has 30% smaller area than 6” sander.

square (5/6) = 0.7
square (6/5) = 1.44

So 6” sander is much faster than 5” sander but 5” is not much slower than 6” sander.

Go figure.

View DirtyMike's profile (online now)


383 posts in 320 days

#2 posted 10-17-2016 06:53 PM

I have been wondering the same thing Mike, And that bosch does looks like a great value for money. I like to make big projects and I feel a 6 inch is in my future, but i will still keep my 5 inch.

View Kirk650's profile


272 posts in 167 days

#3 posted 10-17-2016 07:51 PM

I don’t have a 6 inch ROS. I had planned to buy one, but the 5 inch ones (Ridgid, one each with 150, 220, and 320 grit) have worked so well I never did buy a 6 inch. I like the Ridgid ones because my shop vac hose plugs right into the dust outlet on the sander.


View Ken90712's profile


16863 posts in 2607 days

#4 posted 10-17-2016 10:03 PM

Totally worth it, I have 2 5’s and a lot of discs bought the 6 and cpl of the grits and love it.

-- Ken, "Everyday above ground is a good day!"

View moke's profile


847 posts in 2195 days

#5 posted 10-18-2016 03:50 PM

Has anyone got the Rigid ROS 6”’s only 100.00….

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