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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

1100 rpm

Limiting Speed - Grease

900 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

1010000 lbf4500000 N4500.00 kN

Dynamic Load Rating

390000 lbf1740000 N1740.00 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

16.5354 in420.000 mm

D

22.0472 in560.000 mm

B

5.5118 in140 mm

C

5.5118 in140 mm

Fw

18.3071 in465.000 mm

r

0.1575 in4.000 mm

da min

17.1654 in436.000 mm

db min

17.6378 in448.000 mm

Da max

21.4173 in544.000 mm

ras max

0.1181 in3 mm