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

 Tapered

Material

 Hardened Alloy Steel

Cage Material

 High Strength, 2 piece, Machined Brass

Limiting Speed - Oil

 1100 rpm

Limiting Speed - Grease

 940 rpm

Taper

 1:12

Precision

 ISO Class 0

Tolerance

 ISO Class 0 (RBEC 1)

Oil Hole

 w/o Oil Hole

Radial Internal Clearance

 CN

Static Load Rating

 965000 lbf4300000 N4300.00 kN

Dynamic Load Rating

 380000 lbf1690000 N1690.00 kN

Enclosure

 Open

Operating Temperature Range

 -40 to 250 ºF-40 to 120 ºC

Dimensional Specifications


Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NNU - Dimensions

d

 15.748 in400.000 mm

D

 21.2598 in540.000 mm

B

 5.5118 in140 mm

C

 5.5118 in140 mm

Fw

 17.5197 in445.000 mm

r

 0.1575 in4.000 mm

da min

 16.3780 in416.000 mm

db min

 16.8504 in428.000 mm

Da max

 20.6299 in524.000 mm

ras max

 0.1181 in3 mm