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

NTN BEARING CORPORATION OF AMERICA
Head Office
1600 E. Bishop Court, P.O. Box 7604
Mount Prospect, IL 60056-7604, U.S.A.
Phone: 847-298-7500
Fax: 847-699-9744
Toll Free: 800-323-2358
Email: mkt@ntnamerica.com
Website: www.ntnamericas.com

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Technical Specifications

Type	N/A Angular Contact Ball Bearing
Bore Type	N/A Round
Material	N/A High Carbon Chrome Steel
Cage Type	N/A High Strength, 2 piece, Machined
Cage Material	N/A Brass
Ball Material	N/A Steel
Limiting Speed - Oil	N/A 5900 RPM
Limiting Speed - Grease	N/A 4500 RPM
Precision	N/A ISO Class 0
Configuration	N/A Two
Preload	N/A Normal
Radial Internal Clearance	N/A CN
Static Load Rating	N/A 25404 lbf113000 N113.00 kN
Dynamic Load Rating	N/A 28776 lbf128000 N128.00 kN
Enclosure	N/A Open
Weight	N/A 6.977 lb3.160 kg
Operating Temperature Range	N/A -40 to 250 ºF-40 to 120 ºC

Dimensional Specifications

Duplex Angular Contact Ball Bearing - Back-to-Back Arrangement - Dimensions
d	N/A 2.1650 in55.000 mm
D	N/A 4.7244 in120.000 mm
B	N/A 1.1417 in29.000 mm
2B	N/A 2.2835 in58.000 mm
r	N/A 0.0787 in2.000 mm
r1	N/A 0.0394 in1.000 mm
Contact Angle	N/A 30 º
da min	N/A 2.5591 in65.000 mm
db min	N/A 2.3819 in60.500 mm
Da max	N/A 4.3307 in110.000 mm
Db max	N/A 4.5079 in114.500 mm
ras max	N/A 0.0787 in2.000 mm
r1as max	N/A 0.0394 in1.000 mm