NSKNU311Cylindrical Roller Bearing — NU Type, 55 mm ID, 120 mm OD, 29 mm Width, Non-Locating, Medium Series, CN Clearance

Product Description

What this part is:

The NSK NU311 is a single-row cylindrical roller bearing, NU design, from the medium 03 series. Bore Diameter: 55 mm. Outside Diameter: 120 mm. Overall Width: 29 mm. Two integral ribs on the outer ring guide the rollers and the inner ring has no ribs. Unit Quantity: 1 Pc. One complete bearing, inner ring and outer ring with roller and cage assembly.

Decoding the designation:

NU — cylindrical roller bearing, ribbed outer ring, rib-free inner ring, non-locating.

311 — ISO dimension series 03, bore code 11, 55 x 120 x 29 mm.

Specifications:

Bearing Type: Cylindrical Roller Bearing. Rolling Elements: Cylindrical Roller. Number Of Rows: 1. Axial Location: Non-locating. Bore Type: Straight. Closure Type: Open. Internal Clearance: CN. Series: NU300.

Dimensions and mounting:

Bore Diameter: 55 mm. Outside Diameter: 120 mm. Overall Width: 29 mm. The inner ring separates from the outer ring and roller assembly. The rib-free inner ring lets the shaft float axially relative to the housing.

Compatibility and replacement:

Cross-references: NTN NU311, Koyo NU311, Nachi NU311, SKF NU 311 ECP (E design, polyamide cage), FAG NU311-E-TVP2 (E design, polyamide cage). Each shares the 55 x 120 x 29 mm envelope and NU-type non-locating geometry. N311, NJ311 and NUP311 differ in rib arrangement and are different parts.

Frequently asked questions:

What size is the NSK NU311?

55 mm bore, 120 mm outside diameter, 29 mm width.

What does NU mean in NU311?

NU is a cylindrical roller bearing with a ribbed outer ring and a rib-free inner ring, non-locating.

What internal clearance does the NU311 have?

CN, normal radial internal clearance.