Needle roller bearings are rotational motion bearings in which a thin needleshaped roller is incorporated into a rolling element They have a low crosssection height and high load capacity compared with ball bearings Being small needle roller bearings contribute to reducing overall machine size and are thus widely
GTRI、GTR GBRI、GBR NAF、RNAF NAU NAG TRU NAS NTB AZK、AZ NAXI、NAX NBXI、NBX NATA NATB Bearings can be roughly classified into radial bearings and thrust bearings according to applicable load direction Radial Bearings are grouped into Shell Type Needle Roller Bearings Machined Type Needle
Structures of Machined Type Needle Roller Bearings Outer ring Cage Needle roller Outer ring Cage Needle roller Inner ring Outer ring Needle roller Seal Cage Outer ring Malletshaped roller Stop ring NA49・TAFI GTR RNA49…UU・TAF…UU RNA49・TAF D2 ○Machined Type Caged Needle Roller Bearings
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NA 69 NA 48 TRI TAFI BRI GTR GBR GBRI GTRI Caged Needle Roller Bearings Guide Needle Roller Bearings Without inner ring With inner ring Without inner ring With inner ring Metric series □Identification Number Model code Supplemental code Classification symbol Dimensions NA 49 UU Type of bearing
