INA PNA25/47 Needle Roller Bearing, With Inner Ring, Self Aligning, Precision, Steel Cage, Open End, Metric, 25mm ID, 47mm OD, 20mm Width, 9000rpm Maximum Rotational Speed

This INA self aligning radial needle roller bearing has an inner ring and a steel cage, and is suitable for applications with high dynamic and static loads. It has a spherical outer ring and a concave plastic support ring, which allow the bearing to compensate for static misalignments of up to 3 degrees between the shaft and housing. The inner ring provides a hardened and ground roller raceway for applications in which the shaft cannot be used as a raceway. The steel cage provides guidance and even spacing of the rollers for reduced friction, vibration, and noise when operated at high speeds. The needle rollers are made of through-hardened, high-carbon chromium steel for durability and heat tolerance. This self aligning radial needle roller bearing can be used at temperatures from -4 to 248 degrees F (-20 to 120 degrees C), and is used in various applications, such as automotive and truck transmissions, agricultural and construction equipment, pumps and compressors, and two-cycle engines, among others.Roller bearings use rolling elements to maintain a 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. Roller bearings can be open on both ends (a shaft can pass through) or open on one end and closed on the other. An open end can be sealed or shielded to protect the bearing from solid contaminants and moisture that could reduce its lifespan. If an end is sealed, the sealing component is an elastomer lip that contacts the shaft. If it is shielded, the shielding is a non-contact lip, usually made of metal. 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.INA manufactures bearings for automotive and industrial applications. The company is part of the Schaeffler Group, founded in 1946 in Herzogenaurach, Germany, and meets International Organization for Standardization (ISO) standards 9001:2008 and TS 16949:2009 for quality assurance.

• Radial needle roller bearing for applications with high dynamic and static loads
• Inner ring provides a hardened and ground raceway
• Compensates for static misalignments of up to 3 degrees between the shaft and housing
• Steel cage guides and evenly spaces rollers for reduced friction, vibration, and noise
• Through-hardened, high-carbon chromium steel rollers for heat tolerance and durability under heavy loads