Table saw blade speed

[jack12345]

I'm replacing the motor on my table saw.I have a 3450 rpm motor that is geared to turn blade about 4000 rpm.The replacement motor is 1725 rpm and will have to buy a pulley .Whats the speed is best for a table saw? At 4000 rpm it seems to put a lot of fine dust in the air... would a slower speed reduce dust? Thanks, Jack

 

[kez]

Hi!
There are several variables to be considered. A few examples. The larger the diameter of the saw blade the slower the saw blade can turn. My 71/4” electric hand saw runs at 5500 rpm. My Makita 10”cutoff saw at 4000 rpm. A strong motor that doesn’t slow down when you push material into saw keeps up the blades rpm. The faster you feed the material into the blade the faster the blade needs to turn. As a rule finer teeth make finer dust. A larger coarse rip saw blade make good size sawdust. My guess is you have a 10” table saw and it would probably make you happy at about 4000 rpm. AK

 

[Bud in FLA]

We used to have to pull out the book to get info - and actully do MATH! I haven't tried this but it looks like it might help -

http://www.csgnetwork.com/pulleybeltcalc.html

 

[Pooh Bear]

Saw blades should turn at 10k to 10.5k feet/min

(RPM x (blade diameter) x 3.14)/12 = feet/min

Just under 10500 feet/min is real good.

I run 7 1/4 blades on my table saw
so there is less load on the motor.
I only switch to bigger blades when I need to.

Pooh Bear

 

[Anonymous-0]

Try a lower blade speed.Ive run an 8 inch table saw a lower speed for many years.Lower speeds take less power.A sharp blade is more important than blade rpm.

 

[Anonymous-0]

I just found the problem with my auction purchased Craftsman 10" saw...loose pulley on blade arbor shaft , for years I couldn't find the problem, and last night my son and I were ripping some pine boards and she stalled the blade and we adjusted the belt, and it did it again, that also explains the rattle noise too, I will replace the pulley and make sure it stays tight, I always thought the motor was wired wrong,woot!

 

[Leroy]

I have been watching this and the speeds mentioned seemed way too high so I just went out and checked my saws. 8" Craftsman 1725 RPM 1/2 HP on a 2 1/2" motor pully and 2" pully on the saw arber for a speed of 2,156 RPM and a 8" no name brand cheapy saw with a 1725 RPM 1/2 HP motor with a 2" pully and 1 3/4" saw arber pully for a speed of 1971 RPM and use a 7 1/4" blade on the cheapy 8" saw. Would not want faster and the 1/2 HP motors have all the power needed.

 

[Anonymous-0]

Castiron pullys will out perform the whith metal pullys. They grip the belt better, and don't tend to come loos as much. I don't see any advantage to running faster than motor speed, (3450) more or less, and they seem to work fine at slower surface speeds. That is using a smaller blade with a slower surface speed. Especially if you are a little down on power running a smaller blade will help.