Item # NA4988, Machined-Ring Needle Roller Bearing w/ Inner Ring - NA48, NA49 Series On NTN Bearing Corp. of America

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	Item # NA4988, Machined-Ring Needle Roller Bearing w/ Inner Ring - NA48, NA49 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		Needle Roller Bearing

Bore Type		Round

Material		High Carbon Chrome Steel

Cage Material		Steel

Limiting Speed - Oil		800 RPM

Limiting Speed - Grease		550 RPM

Precision		ISO Class 0

Configuration		One

Enclosure		Open

Bearing Design		w/ Inner Ring

Oil Hole		w/ Oil Hole

Radial Internal Clearance		CN

Static Load Rating		1030000 lbf 4600000 N 4600.00 kN

Dynamic Load Rating		395000 lbf 1750000 N 1750.00 kN

Weight		271.168 lb 123.000 kg

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

Dimensional Specifications

		Machined-Ring Needle Roller Bearing w/ Inner Ring - NA48, NA49 Series - Dimensions larger image

d		1.5748 in 40.000 mm

D		23.6220 in 600.000 mm

F		19.2913 in 490.000 mm

B		6.2992 in 160.000 mm

r		0.1575 in 4.000 mm

s		0.0984 in 2.500 mm

da min		17.9528 in 456.000 mm

Da max		22.9921 in 584.000 mm

ras max		0.1181 in 3 mm

Item # NA4988, Machined-Ring Needle Roller Bearing w/ Inner Ring - NA48, NA49 Series