Tim Zimmerman wrote:
My Black&Decker electric mower was loan to friend. He ran the
mower over several boulders several times, chipping a couple
pearl size sections off the blade. Possibly, this is causing the mover
to vibrate to the point of causing a shoulder sore.

I remove the blade, then clamp it to a vise grip. I have an angle
grinder that I will use to fix the balancing problem. The problem is,
I've never done this before. What is a practical way to balance a
mower blade?

Thanks




Don't know how big "pearl size" is since pearls
come in a lot of different sizes. You're going to
have to do a lot of grinding to get it in good
shape and balanced.

To balance it, just clamp a six or eight penny
nail in a vice (horizontal) with about 3/4"
sticking out. Or, pound the nail into anything
and stick the center hole of the blade on it. You
can get fancier but a nail works. Set the blade
slightly off horizontal and grind until the side
that is down always swings down (try each side
slightly below horizontal).

Finally, you may have a worse problem than just
chips in the blade -- the crank shaft may be
slightly bent. Be sure you get the blade balanced
well, because you need a balanced blade to tell if
the crankshaft was bent.