7" Green Grinding Wheel for Sharpening Stump Cutter Teeth

The stated purpose of this grinder is to take high carbon steel items down. I have stump grinding teeth that need such a wheel. It seems to do an adequate job but certainly short of diamond dust wheels. Unfortunately, it vibrates terrible and I have not found how to correct this.Concentricity of the wheel is not terrible but the "wobble" is VERY noticeable. It dissappears when the original wheel is installed so I can't blame the grinder spindle (shaft). I fear, long term, the bearings will be the victim of this.Multiple "spacers" to provide for different sized shafts, is the root cause.

Works very good for sharpening my stump grinder!