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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

4600 rpm

Limiting Speed - Grease

3900 rpm

Taper

1:12

Precision

ISO Class 4

Configuration

Two

Oil Hole

w/ Oil Hole

Radial Internal Clearance

C0NA

Static Load Rating

64000 lbf284000 N284.00 kN

Dynamic Load Rating

31000 lbf137000 N137.00 kN

Enclosure

Open

Operating Temperature Range

-40 to 250 ºF-40 to 120 ºC

Dimensional Specifications


Double Row Cylindrical Roller Bearing w/ Tapered Bore & Oil Hole - Type NN - Dimensions

d

4.3307 in110 mm

D

5.9055 in150 mm

B

1.5748 in40.000 mm

C

1.5748 in40.000 mm

Ew

5.4724 in139.000 mm

r

0.0433 in1.100 mm

da min

4.5866 in116.500 mm

db min

4.7244 in120.000 mm

Da max

5.5512 in141.000 mm

Db min

5.5512 in141.000 mm

Db max

5.6496 in143.500 mm

ras max

0.0394 in1 mm