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

Oil Hole

w/o Oil Hole

Radial Internal Clearance

CN

Static Load Rating

600000 lbf2670000 N2670.00 kN

Dynamic Load Rating

305000 lbf1350000 N1350.00 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 NN - Dimensions

d

12.5984 in320.000 mm

D

18.8976 in480.000 mm

B

4.7638 in121 mm

C

4.7638 in121.000 mm

Ew

17.2441 in438.000 mm

r

0.1575 in4.000 mm

da min

13.2283 in336.000 mm

db min

13.6220 in346.000 mm

Db min

17.3622 in441.000 mm

Db max

18.2677 in464.000 mm

ras max

0.1181 in3 mm