As with all small wheels it is important not to spin these too fast, the bearings are too small to handle high rpm's. We find that a 1800rpm motor with 4 drive wheel provides a speed which is tolerable for moderate lengths of operating time.
Keep checking the bearings for heat even at this speed. Higher quality grinding belts have smooth seams which will hardly be noticeable on these hard wheels but cheaper quality belts, especially coarse grit belts will be bumpier than rubber or urethane coated wheels. The item "Belt Grinder 2x72 small wheel set & holder for knife grinders" is in sale since Thursday, December 31, 2015. This item is in the category "Home & Garden\Tools\Power Tools\Grinders\Grinding Wheels & Accessories". The seller is "oregonblademaker" and is located in Hillsboro, Oregon.
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