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

3100 rpm

Limiting Speed - Grease

2600 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

166000 lbf740000 N740.00 kN

Dynamic Load Rating

80000 lbf355000 N355.00 kN

Enclosure

Open

Weight

14.837 lb6.73 kg

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

6.2992 in160.000 mm

D

8.6614 in220.000 mm

B

2.3622 in60 mm

C

2.3622 in60 mm

Fw

7.0276 in178.500 mm

r

0.0787 in2.000 mm

da min

6.6535 in169.000 mm

db min

6.8504 in174.000 mm

Da max

8.3071 in211.000 mm

Db min

8.2087 in208.500 mm

Db max

8.3071 in211.000 mm

ras max

0.0787 in2 mm