Am looking at the Ridgid miter saws - 10" or 12". The 12" saw comes
with a stand, on top of the greater cutting capacity.
However, the blade speed is much lower - 3600 RPMs - than the Ridgid
10" - 5500 RPMs. Will this affect performance significantly? Or, does
the larger blade somehow counter the slower revolutions?
With two different sized blades spinning at the same speed the larger
diameter blade would have a faster rim speed (surface feet per minute
A 10" diameter blade spinning at 5500 RPM has a rim speed of 14399 sfpm.
A 12" diameter blade spinning at 3600 RPM has a rim speed of 11310 sfpm.
Talk about deja vu all over again...
I just went through all that.
I made sufficient budget available to get THE mitre saw I wanted, damn
I also took my sweet time. Did the FAQs, did the DAGS.
In my countertop business, I see a lot of kitchen installers...drove
them nuts with questions... played with their saws.
These things are highly personal, like fire-arms. Once you decide on the
size of the game, you can eliminate a whole bunch of mitre saws right
I simply could not envision ever needing a 12". I worked with a 10"
Delta, no slide, no tilt for over 20 years with some pretty decent
results, including a few thousand feet of crown. (If I had a lot of
outside angles on bigger crown, I'd bring my trusty 12" disc sander for
that ultra-tight fit... tighter than a frog's ass and that is
A 10" with a little extra slide, will make up for that little bit of
diameter of the 12".
12" blades cost more and the 10" field is far more competitive; much
more selection in 10" at much better prices.
Portability wasn't going to be an issue, as any saw was going to get
mounted on the RIDGID Mitre Saw Utility Vehicle Model AC9940 because it
is functional, cool, handy, solid and nothing I could build for that
little money. (About $ 150.00 US)
99%+ of my cuts would be small stuff anyway and saw no need to wind up a
few extra pounds of whirling steel. Those big wheels just don't feel
'surgical' to me.
So.. a 10" slider it was...
Bought it...and boy am I happy.
Tip speed is a wash.
12", 3600*12*pi = 43200*pi (Inches/minute)
10", 5500*10*pi = 55000*pi (Inches/minute)
What size lumber do you need to cut?
Usually, bigger is better, but not always.
I have no need of 12" capacity as an example.
I bought the 12" around a year ago and I love it! I have not used the 12"
greater capacity often, but I have a few times and I was happy that I had
Incidentaly, my 12" blade speed is 4000 RPM, both in the booklet and on the
sticker on the saw. But I have checked their website and it does indeed look
it is now 3600 RPM.
Maybe you can still find one of those older 4000 RPM units in some borg
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