The written instructions can be a bit confusing. There are several videos on the internet that explain the use quite well. Take your time and make small adjustments to the screw weights. It's helpful to mark the heavy spot of the grinding wheel with a pencil (at 6:00) and turn the wheel several times allowing it to stop. When the mark rests in a different position, the wheel is balanced. One problem with most grinding wheels is the side to side wobble. I discovered an easy procedure to reduce or even eliminate this wobble. Sung the nut, spin the wheel and check for wobble. If wobble is apparent, loosen the nut and hold the opposite wheel to prevent the shaft from turning. Turn the wheel about one eighth of a turn and snug the nut. Repeat this process until the wobble is at a minimum.

Works well, have to fiddle with placement as theirs method doesn't always produce the best results. Does work, with some patience. Solved an intractable problem on a ceramic. Just expensive for what it is.

This is a very nicely manufactured kit to allow the balancing of two bench grinding wheels. The wheels fit the grindstone perfectly ( you have to make sure you are buying the correct size wheels to fit the kit) and come with balancing weights ( socket head screws and nuts) and a balancing jig. The instructions for using the kit are clear and simple. It takes only a few minutes to balance the wheel and once done the majority of the out of balance vibration is removed especially if you dress the wheel and then rebalance again. I say a majority because some vibration due to side to side movement of the wheel may not yield to the kits effectiveness. Some wheels, even expensive ones can be very bad in this respect and if so should be returned. This kit is very good value for money and is very effective.

There are parts for 2 wheels for both sides of a dual grinder. I thought I was going to need 2, but the 1 kit was all I needed. This thing is quality! Do not hesitate to buy. It's very much worth the price!!

I'm glad Oneway makes this balancer. I'd read all the reviews beforehand and the ones that said instructions were sparse hit the nail on the head. This kit made my 8" Ryobi bench grinder that I'd had for over a year purr finally, but it took some mods to get it perfect.

The supplied units were well made and thought out. But for some reason when the balancing washer was tightened down on the threaded arbor, the threaded nose of the arbor stuck out past the balancing washer by .070". Doesn't seem like much but it makes the washer for the nut not seat into the balancing washer. So when I'd try to tighten the nut it would cause the balancing washer to come loose. Don't know if my stones were skinnier than normal or what. Put the arbor on the lathe and cut down the nose .075" and viola! Nothing sticking out and it now tightened up on the shaft correctly. The second, fine stone was so out of balance I had to put another washer and a little longer button head screw to get enough weight. Took several tries until I got the extra washer to get it right.

Also the balancer bearings were stiff from grease, causing drag while balancing throwing off balance points. My fix was soaking them in kerosene for a couple of minutes the working them until they were free spinning. Also noticed the nylon spacer between the bearings was thick enough to drag on the seals so chamfered the ends so it was only touching the inner race. Now the wheels go on forever.

My process now is slide the wheel on the arbor WITHOUT THE BALANCING WASHER, put it on the balancer and let it come the the heavy spot. Put a mark with a sharpie straight up. Now pull off the arbor/wheel and screw on the balancing washer and tighten it up. Now put one of your screws towards your mark and the other two 4 and 8 o'clock. Put it back on the balancer and gently spin. It should settle back to your mark pointing straight up. Now only move the the 4 and 8 0'clock bolts towards the 12 o'clock a little at a time. Most times I never rotated more then 1/4 turn until it doesn't settle in the same place every time. Hope this helps as this is a great product, it just needed a little help in my case.