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

940 rpm

Limiting Speed - Grease

800 rpm

Taper

1:12

Precision

ISO Class 0

Configuration

Two

Oil Hole

w/o Oil Hole

Radial Internal Clearance

CN

Static Load Rating

1150000 lbf5100000 N5100.00 kN

Dynamic Load Rating

545000 lbf2420000 N2420.00 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 NN - Dimensions

d

17.3228 in440.000 mm

D

25.5906 in650.000 mm

B

6.1811 in157 mm

C

6.1811 in157 mm

Ew

23.4646 in596.000 mm

r

0.2362 in6.000 mm

da min

18.2677 in464.000 mm

db min

18.7795 in477.000 mm

Da max

23.6614 in601.000 mm

Db min

23.6614 in601.000 mm

Db max

24.6457 in626.000 mm

ras max

0.1969 in5.000 mm