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

 4800 rpm

Limiting Speed - Grease

 4100 rpm

Taper

 1:12

Precision

 ISO Class 0

Configuration

 Two

Oil Hole

 w/o Oil Hole

Radial Internal Clearance

 CN

Static Load Rating

 60500 lbf268000 N268.00 kN

Dynamic Load Rating

 29900 lbf133000 N133.00 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

 4.1339 in105.000 mm

D

 5.7087 in145.000 mm

B

 1.5748 in40.000 mm

C

 1.5748 in40.000 mm

Ew

 5.2756 in134.000 mm

r

 0.0433 in1.100 mm

da min

 4.3898 in111.500 mm

db min

 4.5276 in115.000 mm

Da max

 5.3543 in136.000 mm

Db min

 5.3543 in136.000 mm

Db max

 5.4528 in138.500 mm

ras max

 0.0394 in1 mm