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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 2900 RPM

Limiting Speed - Grease

 N/A 2500 RPM

Taper

 N/A 1:12

Precision

 N/A ISO Class 0

Configuration

 N/A Two

Oil Hole

 N/A w/o Oil Hole

Radial Internal Clearance

 N/A CN

Static Load Rating

 N/A 172000 lbf765000 N765.00 kN

Dynamic Load Rating

 N/A 81000 lbf360000 N360.00 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 NN - Dimensions

d

 N/A 6.6929 in170.000 mm

D

 N/A 9.0551 in230.000 mm

B

 N/A 2.3622 in60.000 mm

C

 N/A 2.3622 in60.000 mm

Ew

 N/A 8.5236 in216.500 mm

r

 N/A 0.0787 in2.000 mm

da min

 N/A 7.0472 in179.000 mm

db min

 N/A 7.2441 in184.000 mm

Da max

 N/A 8.6024 in218.500 mm

Db min

 N/A 8.6024 in218.500 mm

Db max

 N/A 8.7008 in221.000 mm

ras max

 N/A 0.0787 in2.000 mm