This LFR5201NPP U-groove ball bearing is double sealed, has a steel cage, and conforms to the ABEC 3 precision standard. It has a 12 mm inside diameter, a 35 mm outside diameter, a 15.9 mm depth, and a 10 mm U groove. This double-row U-groove bearing is suitable for linear motion applications where the bearing runs along a rail or track. This bearing's inner and outer races are made of case-hardened bearing quality steel for optimum wear resistance. It has Normal radial internal clearance for applications that do not involve thermal expansion or atypical precision. This ball bearing conforms to ABEC 3 precision standard for performance within a narrow range of variation. Rubber seals on both sides of the bearing keep the lubricant in and contaminants out. This bearing has case-hardened bearing quality steel ball bearings for optimum wear resistance. Its "Heavy" bearing design makes it suitable for use with heavy radial loads and moderate axial loads. A steel cage evenly spaces rollers for reduced friction, vibration, and noise. As part of a linear motion system, this U-groove track roller bearing is suitable for use in material handling systems.

Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. 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.