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

 2200 rpm

Limiting Speed - Grease

 1900 rpm

Precision

 ISO Class 0

Configuration

 Two

Tolerance

 ISO Class 0 (RBEC 1)

Oil Hole

 w/o Oil Hole

Radial Internal Clearance

 C3

Static Load Rating

 292000 lbf1300000 N1300.00 kN

Dynamic Load Rating

 132000 lbf585000 N585.00 kN

Enclosure

 Open

Weight

 37.258 lb16.9 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

 8.6614 in220.000 mm

D

 11.811 in300.000 mm

B

 3.1496 in80 mm

C

 3.1496 in80 mm

Fw

 9.6457 in245.000 mm

r

 0.0827 in2.100 mm

da min

 9.0945 in231.000 mm

db min

 9.3701 in238.000 mm

Da max

 11.3780 in289.000 mm

Db min

 11.1811 in284.000 mm

Db max

 11.3780 in289.000 mm

ras max

 0.0787 in2 mm