I used these to replace the arbor bearings on my old handyman table saw. The ID/OD for the saw is not a standard combination available so I was happy to find a replacement set. I'm not sure how they will perform at table saw speeds versus kart wheel speeds, but if they fail after a year of use I have 8 more to back up. So far there have been no problems when I've repaired the kitchen floor with my saw. I will update the review if the bearings fail quickly.