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

13000 rpm

Limiting Speed - Grease

11000 rpm

Taper

1:12

Precision

ISO Class 4

Configuration

Two

Oil Hole

w/o Oil Hole

Radial Internal Clearance

C1NA

Static Load Rating

10700 lbf47500 N47.50 kN

Dynamic Load Rating

8550 lbf38000 N38.00 kN

Enclosure

Open

Weight

0.538 lb0.244 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

1.378 in35 mm

D

2.4409 in62.000 mm

B

0.7874 in20 mm

C

0.7874 in20 mm

Ew

2.1654 in55.000 mm

r

0.0394 in1.000 mm

da min

1.5748 in40.000 mm

db min

1.6339 in41.500 mm

Da max

2.2047 in56.000 mm

Db min

2.2047 in56.000 mm

Db max

2.2441 in57.000 mm

ras max

0.0394 in1 mm