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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

Cylindrical

Material

Hardened Alloy Steel

Cage Material

High Strength, 2 piece, Machined Brass

Limiting Speed - Oil

890 rpm

Limiting Speed - Grease

750 rpm

Precision

ISO Class 0

Configuration

Two

Oil Hole

w/o Oil Hole

Radial Internal Clearance

CN

Static Load Rating

1200000 lbf5350000 N5350.00 kN

Dynamic Load Rating

575000 lbf2550000 N2550.00 kN

Enclosure

Open

Operating Temperature Range

-40 to 250 ºF-40 to 120 ºC

Dimensional Specifications


Double Row Cylindrical Roller Bearing w/ Cylindrical Bore - Type NN - Dimensions

d

18.1102 in460.000 mm

D

26.7717 in680.000 mm

B

6.4173 in163 mm

C

6.4173 in163 mm

Ew

24.4882 in622.000 mm

r

0.2362 in6.000 mm

da min

19.0551 in484.000 mm

db min

19.6063 in498.000 mm

Db min

24.6850 in627.000 mm

Db max

25.8268 in656.000 mm

ras max

0.1969 in5.000 mm