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The GBRI series of the inch series includes types with a seal or seals which are incorporated on one or both sides. Table 1.1 Type of bearing (Standard type). Type. Series. Inch series. Dimension series 49. Dimension series 69. Dimension series 48. For heavy duty. For light duty. RNA 49. RNA 69. RNA 48. TR. TAF. BR.
Needle roller bearings are rotational motion bearings in which a thin needle-shaped roller is incorporated into a rolling element. They have a low cross-section height and high load capacity compared with ball bearings. Being small, needle roller bearings contribute to reducing overall machine size, and are thus widely
IKO Machined Type Needle Roller Bearings are bearings with a low sectional height and large load ratings. The outer ring has high rigidity and can easily be used even for light alloy housings. These bearings are available in metric series and inch series, both of which have the caged type and the full complement type.