Needle roller bearingsFeatures:Raceway Ring ShapeNeedle rollerLoad DirectionRadialNo axialNeedle roller bearings sustain only the radial loads, no axial loads, adopting thin and long rollers, the length of the roller is 3-5 times of the roller diameter, the roller diameter equal or less than 5mm, very small radial size and compact size help it suitable for all conditions where radial size are limited.To be used in different places, the machining accuracy and surface quality should be consistent with the raceway of bearing rings.Generally the limiting speed is not high.Applications:Being widely used in kinds of mechanical equipment like machine tools, printing machinery, textile machinery, metallurgical machinery etc.Single-row needle roller bearingsModelNameFeaturesNA typeSingle-row needle roller bearingsOnly the radial loads can be sustained,no axial loads, compact size make it suitable for condition where radial size are limited, can be installed with inner and outer rings, limiting speed is high.RNA,NK typeSingle-row needle roller bearings without inner ringsThe surface of journal directly as a bearing inner raceway surface, the surface hardness, machining accuracy and surface quality of journal should be close to the ring raceway, limiting speed is low.