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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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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 4600 RPM

Limiting Speed - Grease

 N/A 3900 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 64000 lbf284000 N284.00 kN

Dynamic Load Rating

 N/A 31000 lbf137000 N137.00 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 4.3307 in110.000 mm

D

 N/A 5.9055 in150.000 mm

B

 N/A 1.5748 in40.000 mm

C

 N/A 1.5748 in40.000 mm

Fw

 N/A 4.8425 in123.000 mm

r

 N/A 0.0433 in1.100 mm

da min

 N/A 4.5866 in116.500 mm

db min

 N/A 4.7244 in120.000 mm

Da max

 N/A 5.6496 in143.500 mm

Db min

 N/A 5.5512 in141.000 mm

Db max

 N/A 5.6496 in143.500 mm

ras max

 N/A 0.0394 in1.000 mm