Item # NNU4984K, Double Row Cylindrical Roller Bearing w/ Tapered Bore

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	Item # NNU4984K, 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		1100 RPM

Limiting Speed - Grease		900 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		1010000 lbf 4500000 N 4500.00 kN

Dynamic Load Rating		390000 lbf 1740000 N 1740.00 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		16.5354 in 420.000 mm

D		22.0472 in 560.000 mm

B		5.5118 in 140.000 mm

C		5.5118 in 140.000 mm

Fw		18.3071 in 465.000 mm

r		0.1575 in 4.000 mm

da min		17.1654 in 436.000 mm

db min		17.6378 in 448.000 mm

Da max		21.4173 in 544.000 mm

ras max		0.1181 in 3 mm

Item # NNU4984K, Double Row Cylindrical Roller Bearing w/ Tapered Bore - Type NNU