Item # 28990/28920, Tapered Roller Set - Inch Series and J Series On NTN Bearing Corp. of America

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	Item # 28990/28920, Tapered Roller Set - Inch Series and J Series

Unit of Measure: Imperial Metric Both

Order Now · Technical Specifications · Dimensional Specifications

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Ordering Options		Find a Distributor Contact NTN Customer Support Specialist Order through NTN DOL (Authorized Distributors Only)

Technical Specifications

Type		Tapered Roller Bearing

Bore Type		Round

Material		Case Carburized Steel

Style		Cone & Cup

Precision Rating		Class 4

Cone Number		28990

Cup Number		28920

Configuration		One

Lubrication		w/o Oil Hole

e (Axial Load Factor)		0.43

Y2 (Axial Load Factor)		1.41

Static Load Rating		30000 lbf 134000 N 134.00 kN

Dynamic Load Rating		20300 lbf 90500 N 90.50 kN

Enclosure		Open

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

Dimensional Specifications

		Tapered Roller Set - Inch Series and J Series - Dimensions larger image

B		2.4400 in 61.976 mm

D		4.0000 in 101.600 mm

Wo		0.7813 in 19.845 mm

Wi		0.9688 in 24.608 mm

W		1.0000 in 25.400 mm

r		0.1300 in 3.300 mm

R		0.08 in 2.0 mm

a (Effective Load Center)		-0.0700 in -1.700 mm

U		2.83 in 72.0 mm

V		2.68 in 68.0 mm

X		3.82 in 97.0 mm

Z		3.54 in 90.0 mm

Item # 28990/28920, Tapered Roller Set - Inch Series and J Series