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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

Tapered

Material

Hardened Alloy Steel

Cage Material

High Strength, 2 piece, Machined Brass

Limiting Speed - Oil

950 RPM

Limiting Speed - Grease

800 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

1320000 lbf5850000 N5850.00 kN

Dynamic Load Rating

500000 lbf2220000 N2220.00 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

18.1102 in460.000 mm

D

24.4094 in620.000 mm

B

6.2992 in160.000 mm

C

6.2992 in160.000 mm

Fw

20.1575 in512.000 mm

r

0.1575 in4.000 mm

da min

18.7402 in476.000 mm

db min

19.2520 in489.000 mm

Da max

23.7795 in604.000 mm

ras max

0.1181 in3 mm