DIY grinding wheel balancing jig

[tonyfoale]

Drilling (or any modification) to a grinding wheel is unwise. Balance should be corrected with a weight balancing washer. Example, drill holes in a steel washer to get the needed offset weight.

"UNWISE?" It is out and out dangerous. If anyone seeing this video is tempted to follow the drilling for balance method then please do not. It could kill you.
In the past I have seen several posts on here that are far from good practice but I usually refrain from criticism because people are unlikely to be harmed. The dangers to anyone following this post are just too great to ignore.
Centrifugally induced stresses in a rotating disk are highest at the centre and reduce as you move toward the perifrery

Saltfever has pointed out that balance can be easily and correctly achieved by using unbalanced washers to cancel the unbalance of the wheels. Another way is to use two eccentric washers, then you can adjust the balance without re-drilling if for example you change wheels. Imagine that the eccentricity offset of each washer is set at 180 deg to each other. Then the washers balance each other and have no effect on the wheel. Now imagine that the two washers have the same orientation. This will create the maximum unbalanced condition of the washers. Place the washers between these two extremes and you can get whatever unbalance is needed to balance the wheel, provided that the maximum unbalance from the washers is enough.

PLEASE DO NOT DRILL YOUR WHEELS. This could happen.