Item # NN4921, Double Row Cylindrical Roller Bearing w/ Cylindrical Bore

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	Item # NN4921, Double Row Cylindrical Roller Bearing w/ Cylindrical Bore - Type NN

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

Unit of Measure: Imperial Metric Both

Order Now · Technical Specifications · Dimensional Specifications

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Ordering Options		Contact NTN Customer Relations

Technical Specifications

Type		Cylindrical Roller Bearing

Bore Type		Cylindrical

Material		Hardened Alloy Steel

Cage Material		High Strength, 2 piece, Machined Brass

Limiting Speed - Oil		4800 RPM

Limiting Speed - Grease		4100 RPM

Precision		ISO Class 0

Configuration		Two

Oil Hole		w/o Oil Hole

Radial Internal Clearance		CN

Static Load Rating		60500 lbf 268000 N 268.00 kN

Dynamic Load Rating		29900 lbf 133000 N 133.00 kN

Enclosure		Open

Operating Temperature Range		-40 to 250 ºF -40 to 120 ºC

Dimensional Specifications

		Double Row Cylindrical Roller Bearing w/ Cylindrical Bore - Type NN - Dimensions larger image

d		4.1339 in 105.000 mm

D		5.7087 in 145.000 mm

B		1.5748 in 40.000 mm

C		1.5748 in 40.000 mm

Ew		5.2756 in 134.000 mm

r		0.0433 in 1.100 mm

da min		4.3898 in 111.500 mm

db min		4.5276 in 115.000 mm

Db min		5.3543 in 136.000 mm

Db max		5.4528 in 138.500 mm

ras max		0.0394 in 1.000 mm

Item # NN4921, Double Row Cylindrical Roller Bearing w/ Cylindrical Bore - Type NN