NTN BEARING CORPORATION 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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Inner Ring
Inner Ring - Dimensions
Unit of Measure
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Item #

d

F

B

r

1R45X52X30 N/A 1.7717 in45.000 mm N/A 2.0472 in52.000 mm N/A 1.1811 in30.000 mm N/A 0.0236 in0.600 mm
1R45X52X40 N/A 1.7717 in45.000 mm N/A 2.0472 in52.000 mm N/A 1.5748 in40.000 mm N/A 0.0236 in0.600 mm
1R45X55X20 N/A 1.7717 in45.000 mm N/A 2.1654 in55.000 mm N/A 0.7874 in20.000 mm N/A 0.0236 in0.600 mm
1R45X55X22 N/A 1.7717 in45.000 mm N/A 2.1654 in55.000 mm N/A 0.8661 in22.000 mm N/A 0.0394 in1.000 mm
1R45X55X40 N/A 1.7717 in45.000 mm N/A 2.1654 in55.000 mm N/A 1.5748 in40.000 mm N/A 0.0236 in0.600 mm
1R50X55X20 N/A 1.9685 in50.000 mm N/A 2.1654 in55.000 mm N/A 0.7874 in20.000 mm N/A 0.0236 in0.600 mm
1R50X55X25 N/A 1.9685 in50.000 mm N/A 2.1654 in55.000 mm N/A 0.9843 in25.000 mm N/A 0.0236 in0.600 mm
1R50X55X35 N/A 1.9685 in50.000 mm N/A 2.1654 in55.000 mm N/A 1.3780 in35.000 mm N/A 0.0236 in0.600 mm
1R50X55X40 N/A 1.9685 in50.000 mm N/A 2.1654 in55.000 mm N/A 1.5748 in40.000 mm N/A 0.0236 in0.600 mm
1R50X58X22 N/A 1.9685 in50.000 mm N/A 2.2835 in58.000 mm N/A 0.8661 in22.000 mm N/A 0.0236 in0.600 mm
1R50X58X23D N/A 1.9685 in50.000 mm N/A 2.2835 in58.000 mm N/A 0.9055 in23.000 mm N/A 0.0236 in0.600 mm
1R50X58X30 N/A 1.9685 in50.000 mm N/A 2.2835 in58.000 mm N/A 1.1811 in30.000 mm N/A 0.0236 in0.600 mm
1R50X58X40 N/A 1.9685 in50.000 mm N/A 2.2835 in58.000 mm N/A 1.5748 in40.000 mm N/A 0.0236 in0.600 mm
1R50X60X20 N/A 1.9685 in50.000 mm N/A 2.3622 in60.000 mm N/A 0.7874 in20.000 mm N/A 0.0394 in1.000 mm
1R50X60X25 N/A 1.9685 in50.000 mm N/A 2.3622 in60.000 mm N/A 0.9843 in25.000 mm N/A 0.0394 in1.000 mm
1R50X60X28 N/A 1.9685 in50.000 mm N/A 2.3622 in60.000 mm N/A 1.1024 in28.000 mm N/A 0.0433 in1.100 mm
1R50X60X40 N/A 1.9685 in50.000 mm N/A 2.3622 in60.000 mm N/A 1.5748 in40.000 mm N/A 0.0394 in1.000 mm
1R55X60X25 N/A 2.1654 in55.000 mm N/A 2.3622 in60.000 mm N/A 0.9843 in25.000 mm N/A 0.0236 in0.600 mm
1R55X60X35 N/A 2.1654 in55.000 mm N/A 2.3622 in60.000 mm N/A 1.3780 in35.000 mm N/A 0.0236 in0.600 mm
1R55X63X25 N/A 2.1654 in55.000 mm N/A 2.4803 in63.000 mm N/A 0.9843 in25.000 mm N/A 0.0394 in1.000 mm
1R55X63X34 N/A 2.1654 in55.000 mm N/A 2.4803 in63.000 mm N/A 1.3386 in34.000 mm N/A 0.0394 in1.000 mm
1R55X63X45 N/A 2.1654 in55.000 mm N/A 2.4803 in63.000 mm N/A 1.7717 in45.000 mm N/A 0.0394 in1.000 mm
1R55X65X28 N/A 2.1654 in55.000 mm N/A 2.5591 in65.000 mm N/A 1.1024 in28.000 mm N/A 0.0433 in1.100 mm
1R55X65X30 N/A 2.1654 in55.000 mm N/A 2.5591 in65.000 mm N/A 1.1811 in30.000 mm N/A 0.0394 in1.000 mm
1R55X65X60 N/A 2.1654 in55.000 mm N/A 2.5591 in65.000 mm N/A 2.3622 in60.000 mm N/A 0.0394 in1.000 mm
Unit of Measure
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