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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 3300 RPM

Limiting Speed - Grease

 N/A 2800 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 155000 lbf690000 N690.00 kN

Dynamic Load Rating

 N/A 77500 lbf345000 N345.00 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 5.9055 in150.000 mm

D

 N/A 8.2677 in210.000 mm

B

 N/A 2.3622 in60.000 mm

C

 N/A 2.3622 in60.000 mm

Fw

 N/A 6.6339 in168.500 mm

r

 N/A 0.0787 in2.000 mm

da min

 N/A 6.2598 in159.000 mm

db min

 N/A 6.4567 in164.000 mm

Da max

 N/A 7.9134 in201.000 mm

Db min

 N/A 7.8150 in198.500 mm

Db max

 N/A 7.9134 in201.000 mm

ras max

 N/A 0.0787 in2.000 mm