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Koyo NK Needle Roller Bearing
NK Metric Needle Roller Bearings (without inner rings): One-piece, channel-shaped outer ring of heat-treated bearing-quality steel. Integral end flanges provide axial location and serve as piloting surfaces. Steel cage retains needles, ensuring stability and minimizing friction. High-load capacity. Economical and precise control of radial clearance when the shaft can be used as the raceway. If the shaft meets design needs, an inner ring can be used. Standard bearings (e.g., NA series) come with inner rings. Meet ISO quality standards. Available in various styles, with or without inner rings and seals.
Category Files
Metric Series Needle Roller Bearing without inner rings.
NK Metric needle roller bearing has a one-piece, channel-shaped outer ring of bearing -quality steel heat treated to yield maximum load rating. The integral end flanges provide axial location for the needle rollers. The bore of the end flanges serves as piloting surfaces for the cage. A steel cage provides inward retention for the needle rollers, and the design assures roller stability and minimizes friction between the cage and the needle rollers. The cage has maximum strength consistent with the inherent high-load ratings of needle roller bearings. Whenever the shaft can be used as the inner raceway, needle roller bearings without inner rings provide advantages of economy and close control of radial internal clearance in operation. When it is practical to finish the shaft to meet the desired raceway design requirements, an inner ring may be used. Standard needle roller bearings are available with inner rings (such as the NA series) to form a complete bearing. Bearings furnished with inner rings meet the quality requirements in accordance with ISO standards. Needle roller bearings are available in different styles with and without inner rings and seals.
NK Metric needle roller bearing has a one-piece, channel-shaped outer ring of bearing -quality steel heat treated to yield maximum load rating. The integral end flanges provide axial location for the needle rollers. The bore of the end flanges serves as piloting surfaces for the cage. A steel cage provides inward retention for the needle rollers, and the design assures roller stability and minimizes friction between the cage and the needle rollers. The cage has maximum strength consistent with the inherent high-load ratings of needle roller bearings. Whenever the shaft can be used as the inner raceway, needle roller bearings without inner rings provide advantages of economy and close control of radial internal clearance in operation. When it is practical to finish the shaft to meet the desired raceway design requirements, an inner ring may be used. Standard needle roller bearings are available with inner rings (such as the NA series) to form a complete bearing. Bearings furnished with inner rings meet the quality requirements in accordance with ISO standards. Needle roller bearings are available in different styles with and without inner rings and seals.