6204-2RS Double Seal - Suitable for Harsh External Environment and Moderate Temperature Applications (-20 ~ 100 Degrees Celsius).Normally Used Inside the Machine and With Enough Lubricating Oil, (Use 2RS Bearings to Clean the Internal Grease, The Equivalent of Open Bearings).This single-row bearing is built to support radial loads and has a revolutions per minute (RPM) limit of 12,000 with greased lubrication.This bearing has rubber seals on both sides to keep lubricant in and contaminants out and has been lubricated at the manufacturer so no additional lubrication is required.Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.