The rollers in the NN type bearing are guided by the ribs of the inner ring.
Unit of Measure

Technical Specifications

Type

Cylindrical Roller Bearing

Bore Type

Cylindrical

Material

Hardened Alloy Steel

Cage Material

High Strength, 2 piece, Machined Brass

Limiting Speed - Oil

1300 rpm

Limiting Speed - Grease

1100 rpm

Precision

ISO Class 0

Configuration

Two

Tolerance

ISO Class 0 (RBEC 1)

Oil Hole

w/o Oil Hole

Radial Internal Clearance

CN

Static Load Rating

730000 lbf3250000 N3250.00 kN

Dynamic Load Rating

286000 lbf1270000 N1270.00 kN

Enclosure

Open

Operating Temperature Range

-40 to 250 ºF-40 to 120 ºC

Dimensional Specifications


Double Row Cylindrical Roller Bearing w/ Cylindrical Bore - Type NNU - Dimensions

d

14.1732 in360.000 mm

D

18.8976 in480.000 mm

B

4.6457 in118 mm

C

4.6457 in118 mm

Fw

15.6693 in398.000 mm

r

0.1181 in3.000 mm

da min

14.6850 in373.000 mm

db min

15.0787 in383.000 mm

Da max

18.3858 in467.000 mm

ras max

0.0984 in2.5 mm