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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

910 RPM

Limiting Speed - Grease

770 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

1330000 lbf5900000 N5900.00 kN

Dynamic Load Rating

515000 lbf2280000 N2280.00 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

18.8976 in480.000 mm

D

25.5906 in650.000 mm

B

6.6929 in170.000 mm

C

6.6929 in170.000 mm

Fw

21.0236 in534.000 mm

r

0.1969 in5.000 mm

da min

19.6850 in500.000 mm

db min

20.2362 in514.000 mm

Da max

24.8031 in630.000 mm

ras max

0.1575 in4.000 mm