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

3600 rpm

Limiting Speed - Grease

3000 rpm

Precision

ISO Class 0

Configuration

Two

Oil Hole

w/o Oil Hole

Radial Internal Clearance

CN

Static Load Rating

106000 lbf470000 N470.00 kN

Dynamic Load Rating

51000 lbf227000 N227.00 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

5.5118 in140 mm

D

7.4803 in190 mm

B

1.9685 in50 mm

C

1.9685 in50 mm

Ew

7.0079 in178.000 mm

r

0.0591 in1.500 mm

da min

5.8268 in148.000 mm

db min

5.9843 in152.000 mm

Db min

7.0866 in180.000 mm

Db max

7.1654 in182.000 mm

ras max

0.0591 in1.5 mm