Item # NNU4976K, Double Row Cylindrical Roller Bearing w/ Tapered Bore

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	Item # NNU4976K, Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NNU

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		Tapered

Material		Hardened Alloy Steel

Cage Material		High Strength, 2 piece, Machined Brass

Limiting Speed - Oil		1200 RPM

Limiting Speed - Grease		1000 RPM

Taper		1:12

Precision		ISO Class 0

Tolerance		ISO Class 0 (RBEC 1)

Oil Hole		w/o Oil Hole

Radial Internal Clearance		CN

Static Load Rating		910000 lbf 4050000 N 4050.00 kN

Dynamic Load Rating		365000 lbf 1630000 N 1630.00 kN

Enclosure		Open

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

Dimensional Specifications

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

d		14.9606 in 380.000 mm

D		20.4724 in 520.000 mm

B		5.5118 in 140.000 mm

C		5.5118 in 140.000 mm

Fw		16.7323 in 425.000 mm

r		0.1575 in 4.000 mm

da min		15.5906 in 396.000 mm

db min		16.0630 in 408.000 mm

Da max		19.8425 in 504.000 mm

ras max		0.1181 in 3 mm

Item # NNU4976K, Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NNU