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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 1100 RPM

Limiting Speed - Grease

 N/A 900 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 1010000 lbf4500000 N4500.00 kN

Dynamic Load Rating

 N/A 390000 lbf1740000 N1740.00 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 16.5354 in420.000 mm

D

 N/A 22.0472 in560.000 mm

B

 N/A 5.5118 in140.000 mm

C

 N/A 5.5118 in140.000 mm

Fw

 N/A 18.3071 in465.000 mm

r

 N/A 0.1575 in4.000 mm

da min

 N/A 17.1654 in436.000 mm

db min

 N/A 17.6378 in448.000 mm

Da max

 N/A 21.4173 in544.000 mm

ras max

 N/A 0.1181 in3 mm