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    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 4

Configuration

Two

Oil Hole

w/o Oil Hole

Radial Internal Clearance

C1NA

Static Load Rating

15489 lbf68900 N68.90 kN

Dynamic Load Rating

11690 lbf52000 N52.00 kN

Enclosure

Open

Weight

0.867 lb0.390 kg

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

1.7720 in45.000 mm

D

2.9528 in75.000 mm

B

0.9055 in23.000 mm

C

0.9055 in23.000 mm

Ew

2.6575 in67.500 mm

r

0.0394 in1.000 mm

da min

1.9685 in50.000 mm

db min

2.0472 in52.000 mm

Db min

2.7165 in69.000 mm

Db max

2.7559 in70.000 mm

ras max

0.0394 in1.000 mm