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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

2300 RPM

Limiting Speed - Grease

1900 RPM

Taper

1:12

Precision

ISO Class 5

Configuration

Two

Oil Hole

w/o Oil Hole

Radial Internal Clearance

C1NA

Static Load Rating

263000 lbf1170000 N1170.00 kN

Dynamic Load Rating

147000 lbf655000 N655.00 kN

Enclosure

Open

Weight

48.943 lb22.200 kg

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

7.8740 in200.000 mm

D

12.2047 in310.000 mm

B

3.2283 in82.000 mm

C

3.2283 in82.000 mm

Ew

11.1024 in282.000 mm

r

0.0827 in2.100 mm

da min

8.3071 in211.000 mm

db min

8.5827 in218.000 mm

Da max

11.2205 in285.000 mm

Db min

11.2205 in285.000 mm

Db max

11.7717 in299.000 mm

ras max

0.0787 in2.000 mm