Tools and Tool Buying

[dia;]

Got a Sears 10 inch # 922114.table saw.  With the included blade I had a lot of vibration.  I took it off the mobile base I had it on, got a Woodworker II and it still "vibrates" when I turn it off, as the blade slows.  It cuts  well and when  running at full speed it's smooth with no apparent runout.  All the alignments seem to be right on.  Any thoughts?

[knotscott]

There's an electrical phenominon known as regeneration that's an electrical interaction with the motor capacitors that can occur at shutdown.  There are some fixes that involve putting a resistor across the caps, but if the belt is good, alignments are good, runout is low, the blade is flat, and the saw cuts well, etc., I wouldn't worry much about it. 

[TNT Sr]

Make sure your belt is aligned right too.  Then, when you have a few extra dollars, invest in a link belt.

Troy

[knotscott]

---

TNT Sr wrote:

Make sure your belt is aligned right too.  Then, when you have a few extra dollars, invest in a link belt.

Troy

---

Troy - A link belt won't fit the Craftsman 22114 without changing the pulleys out too.  Since this saw has a serpentine style belt, there'd likely be little benefit to changing unless this belt has a serious zig in it, in which case it would probably vibrate while at full speed too.  It's definitely worth checking to see that the belt's ribs are lined up properly. 

[mathisonr1]

Along with checking all of the alignments you might as well also try a blade stalizer.

Rick

[grandpabear]

   is it an old belt that has a "set" from sitting too long?

[The Yooper]

It could also be a resonant (natural) frequency at a certain speed.  When the saw slows down, it goes through that resonant speed and excites the saw for a short period of time.  It wont do this when the saw is starting up because it goes through the speed so fast.

I had arbor bearings go in my G1023 and it vibrated more while slowing down.  I also found that the rip was not accurate to where the fence was set when the saw was stopped - the blade was shifting to the left.  I found that the bearing spun on the arbor. 

I doubt that you have the same issue.

[DRAGON1]

I've had the same problem with all my saws.

I've tried balancing, dampeners, belts and all but I still get that "disturbing" vibration.

A freind of mine with a Walker Turner, adjusted to the millionth, said "Don't worry about it unless it does it during the cut".

That blade spins at quite a speed and the forces involved are from the difference in the blade speed slowing down versus the motor speed when slowing down.

That said, as long as your screws and bolts are tight, cut away!! 

[jandsjacobson99]

I'm gonna throw out a worst case scenario, cause I've seen it.  Is it possible that there is a wobble in your arbor?  Is the blade actually deflecting from left to right as the blade spins, or is the saw just vibrating? 

I used to have a RAS that actually had a wobble in the arbor.  After changing out the blade with a Freud industrial, I found the the blade was still wobbling left to right by nearly 1/16 of an inch.  After an entire day hanging out at a local machine shop, it was found that the motor was just shot.  In my case I couldn't even replace the bearings as it was a pretty cheap motor with no bearings on the back side of the shaft.  That saw is now scrap metal.

Hope your's is much better!

Oh, and a better scenario; I also had problems with my tablesaw vibrating at startup and when the blade was slowing down.  In that case it just turned out that I didn't use my saw enough and during the cold of the winter my belt had developed a bad memory.  Replacing the belt with a link belt fixed the problem.

[Yves en Acadie]

If the saw runs smooth with no vibration while running, then you don't have a problem. I can balance a nickel on my saw (contrator type) at startup, but it falls when I shut down the saw. Been like that for years, even with a link belt.