Item # NN4930K, Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NN On NTN Bearing Corp. of America

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

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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 3300 RPM
Limiting Speed - Grease	N/A 2800 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 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

Loading zoom Open Image Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NN - 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
Ew	N/A 7.7362 in196.500 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 7.8150 in198.500 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