Universal Joint Needle Bearing RNA6917

Specifications

Universal Joint Needle Bearing RNA6917

Structure:

A universal joint has four needle roller bearings that provide the strength and life which is most important and both the axes of the spider are inserted into two yokes. In the bearing, a seal is located to prevent dust, water, etc.from ingress and to prevent grease egress. For heavy duty vehicles with high torque transmission, such as large size vehicles and various industrial machine vehicles, a wing type (3 kinds: block, wing, delta) is used. Bolt-fastening mechanism and key-way are incorporated to the bearing and a precise circle is on its back. By receiving the torque through the key-way, even if a bolt is loosely tightened, the shearing stress does not apply to the bolt.

Needle bearing types and introduction:

NK NKS RNA49 RNA48 RNA59 Double Edge Match of Outer Ring, Single Line, Without Inner Ring

NKI NKIS NA49 NA48 NA59 Double Edge Match of Outer Ring, Single Line, With Inner Ring

RNA69 Double Edge Match of Outer Ring, Double Lines, Without Inner Ring

NA69 Double Edge Match of Outer Ring, Double Lines, With Inner Ring.

RNA49...RS RNA49...2RS Single or Double Surface Airproofing Double Lines

NA69...RS NA69...2RS Single or Double Surface Airproofing Double Lines.

RNAO Outer Ring without capped edge, single line or double lines, without inner ring

NAO Outer Ring without capped edge, single line or double lines, with inner ring.

RNAV Double capped edge of outer ring, single line, without inner ring

NAV Double capped edge of outer ring, single line, with inner ring

Needle bearing characteristic:

Seal form: open style, Z, ZZ, RS, 2RS, 2RZ

Bearing series: HK,BK,RNA

 Class of precision: ABEC-1, ABEC-3, ABEC-5, ABEC-7

Vibration rank: V1, V2, V3, V4

Noise rank: Z1,Z2,Z3,Z4

Internal elimination code: C0, C2, C3, C4, C5

Bearing material: bearing steel (9Cr18), stainless steel(AISI440C, AISI304, AISI316), ceramics

RNA series size: