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    The rollers in the NN type bearing are guided by the ribs of the inner ring.
Unit of Measure

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Ordering Options

 N/A Contact NTN Customer Relations

Technical Specifications

Type

 N/A Cylindrical Roller Bearing

Bore Type

 N/A Tapered

Material

 N/A Hardened Alloy Steel

Cage Material

 N/A High Strength, 2 piece, Machined Brass

Limiting Speed - Oil

 N/A 1400 RPM

Limiting Speed - Grease

 N/A 1200 RPM

Taper

 N/A 1:12

Precision

 N/A ISO Class 0

Tolerance

 N/A ISO Class 0 (RBEC 1)

Oil Hole

 N/A w/o Oil Hole

Radial Internal Clearance

 N/A CN

Static Load Rating

 N/A 670000 lbf2970000 N2970.00 kN

Dynamic Load Rating

 N/A 279000 lbf1240000 N1240.00 kN

Enclosure

 N/A Open

Operating Temperature Range

 N/A -40 to 250 ºF-40 to 120 ºC

Dimensional Specifications


Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NNU - Dimensions

d

 N/A 12.5984 in320.000 mm

D

 N/A 17.3228 in440.000 mm

B

 N/A 4.6457 in118.000 mm

C

 N/A 4.6457 in118.000 mm

Fw

 N/A 14.1339 in359.000 mm

r

 N/A 0.1181 in3.000 mm

da min

 N/A 13.1102 in333.000 mm

db min

 N/A 13.5039 in343.000 mm

Da max

 N/A 16.8110 in427.000 mm

Db min

 N/A 16.2992 in414.000 mm

Db max

 N/A 16.8110 in427.000 mm

ras max

 N/A 0.0984 in2.500 mm