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

1300 rpm

Limiting Speed - Grease

1100 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

710000 lbf3150000 N3150.00 kN

Dynamic Load Rating

286000 lbf1270000 N1270.00 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

13.3858 in340.000 mm

D

18.1102 in460.000 mm

B

4.6457 in118 mm

C

4.6457 in118 mm

Fw

14.9213 in379.000 mm

r

0.1181 in3.000 mm

da min

13.8976 in353.000 mm

db min

14.2913 in363.000 mm

Da max

17.5984 in447.000 mm

ras max

0.0984 in2.5 mm