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

14000 rpm

Limiting Speed - Grease

11600 rpm

Precision

ISO Class 5

Configuration

Two

Oil Hole

w/o Oil Hole

Radial Internal Clearance

CN

Static Load Rating

15400 lbf68500 N68.50 kN

Dynamic Load Rating

11700 lbf52000 N52.00 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

1.7717 in45 mm

D

2.9528 in75.000 mm

B

0.9055 in23 mm

C

0.9055 in23 mm

Ew

2.6575 in67.500 mm

r

0.0394 in1.000 mm

da min

2.1654 in55.000 mm

db min

2.2441 in57.000 mm

Db min

2.9134 in74.000 mm

Db max

2.9528 in75.000 mm

ras max

0.0394 in1 mm