Item # 7311BDB, Duplex Angular Contact Ball Bearing - Back-to-Back Arrangement On NTN Bearing Corp. of America

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	Item # 7311BDB, Duplex Angular Contact Ball Bearing - Back-to-Back Arrangement

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		Angular Contact Ball Bearing

Bore Type		Round

Material		High Carbon Chrome Steel

Cage Type		High Strength, 2 piece, Machined

Cage Material		Brass

Ball Material		Steel

Limiting Speed - Oil		5900 RPM

Limiting Speed - Grease		4500 RPM

Precision		ISO Class 0

Configuration		Two

Preload		Normal

Static Load Rating		25400 lbf 113000 N 113.00 kN

Dynamic Load Rating		28800 lbf 128000 N 128.00 kN

Enclosure		Open

Weight		6.975 lb 3.164 kg

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

Dimensional Specifications

		Duplex Angular Contact Ball Bearing - Back-to-Back Arrangement - Dimensions larger image

d		2.1654 in 55.000 mm

D		4.7244 in 120.000 mm

B		1.1417 in 29.000 mm

2B		2.2835 in 58.000 mm

r		0.0787 in 2.000 mm

r1		0.0394 in 1.000 mm

Contact Angle		40 º

da min		2.5591 in 65.000 mm

db min		2.3819 in 60.500 mm

Da max		4.3307 in 110.000 mm

Db max		4.5079 in 114.500 mm

ras max		0.0787 in 2.000 mm

r1as max		0.0394 in 1.000 mm

Item # 7311BDB, Duplex Angular Contact Ball Bearing - Back-to-Back Arrangement