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

 11000 rpm

Limiting Speed - Grease

 9700 rpm

Taper

 1:12

Precision

 ISO Class 4

Configuration

 Two

Oil Hole

 w/o Oil Hole

Radial Internal Clearance

 C1NA

Static Load Rating

 12500 lbf55500 N55.50 kN

Dynamic Load Rating

 9800 lbf43500 N43.50 kN

Enclosure

 Open

Weight

 0.657 lb0.298 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

 1.5748 in40 mm

D

 2.6772 in68.000 mm

B

 0.8268 in21 mm

C

 0.8268 in21 mm

Ew

 2.4016 in61.000 mm

r

 0.0394 in1.000 mm

da min

 1.7717 in45.000 mm

db min

 1.8504 in47.000 mm

Da max

 2.4409 in62.000 mm

Db min

 2.4409 in62.000 mm

Db max

 2.4803 in63.000 mm

ras max

 0.0394 in1 mm