Using your Speed - Spec 50mm Axle Bearing is straightforward. Just install it in the appropriate equipment where a 50mm inner diameter and 80mm outer diameter bearing is needed. When installing, make sure the bearing is placed correctly and securely. As for maintenance, thanks to the rubber seals, you can clean the bearing regularly to remove dirt and debris. You can also re - lubricate it with a high - temperature and high - viscosity lubricant like the one it comes with. This will help the bearing run smoothly and last longer. Keep in mind to check the bearing's clearance from time to time. If you notice any unusual noise or resistance during operation, it might be time to inspect and maintain the bearing.