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

1R70X80\40 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 1.5748 in40.000 mm N/A 0.0394 in1.000 mm
1R70X80X25 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 0.9843 in25.000 mm N/A 0.0394 in1.000 mm
1R70X80X28 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 1.1024 in28.000 mm N/A 0.0433 in1.100 mm
1R70X80X30 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 1.1811 in30.000 mm N/A 0.0394 in1.000 mm
1R70X80X35 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 1.3780 in35.000 mm N/A 0.0394 in1.000 mm
1R70X80X54 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 2.1260 in54.000 mm N/A 0.0394 in1.000 mm
1R70X80X56 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 2.2047 in56.000 mm N/A 0.0394 in1.000 mm
1R70X80X60 N/A 2.7559 in70.000 mm N/A 3.1496 in80.000 mm N/A 2.3622 in60.000 mm N/A 0.0394 in1.000 mm
1R75X85X25 N/A 2.9528 in75.000 mm N/A 3.3465 in85.000 mm N/A 0.9843 in25.000 mm N/A 0.0394 in1.000 mm
1R75X85X30 N/A 2.9528 in75.000 mm N/A 3.3465 in85.000 mm N/A 1.1811 in30.000 mm N/A 0.0394 in1.000 mm
1R75X85X35 N/A 2.9528 in75.000 mm N/A 3.3465 in85.000 mm N/A 1.3780 in35.000 mm N/A 0.0394 in1.000 mm
1R75X85X40 N/A 2.9528 in75.000 mm N/A 3.3465 in85.000 mm N/A 1.5748 in40.000 mm N/A 0.0394 in1.000 mm
1R75X85X54 N/A 2.9528 in75.000 mm N/A 3.3465 in85.000 mm N/A 2.1260 in54.000 mm N/A 0.0394 in1.000 mm
1R75X90X32 N/A 2.9528 in75.000 mm N/A 3.5433 in90.000 mm N/A 1.2598 in32.000 mm N/A 0.0433 in1.100 mm
1R7X10X10.5 N/A 0.2756 in7.000 mm N/A 0.3937 in10.000 mm N/A 0.4134 in10.500 mm N/A 0.0118 in0.300 mm
1R7X10X12 N/A 0.2756 in7.000 mm N/A 0.3937 in10.000 mm N/A 0.4724 in12.000 mm N/A 0.0118 in0.300 mm
1R7X10X16 N/A 0.2756 in7.000 mm N/A 0.3937 in10.000 mm N/A 0.6299 in16.000 mm N/A 0.0118 in0.300 mm
1R7X12X16 N/A 0.2756 in7.000 mm N/A 0.4724 in12.000 mm N/A 0.6299 in16.000 mm N/A 0.0118 in0.300 mm
1R7X9X10 N/A 0.2756 in7.000 mm N/A 0.3543 in9.000 mm N/A 0.3937 in10.000 mm N/A 0.0059 in0.150 mm
1R80X90X25 N/A 3.1496 in80.000 mm N/A 3.5433 in90.000 mm N/A 0.9843 in25.000 mm N/A 0.0394 in1.000 mm
1R80X90X30 N/A 3.1496 in80.000 mm N/A 3.5433 in90.000 mm N/A 1.1811 in30.000 mm N/A 0.0394 in1.000 mm
1R80X90X35 N/A 3.1496 in80.000 mm N/A 3.5433 in90.000 mm N/A 1.3780 in35.000 mm N/A 0.0394 in1.000 mm
1R80X90X40 N/A 3.1496 in80.000 mm N/A 3.5433 in90.000 mm N/A 1.5748 in40.000 mm N/A 0.0394 in1.000 mm
1R80X90X54 N/A 3.1496 in80.000 mm N/A 3.5433 in90.000 mm N/A 2.1260 in54.000 mm N/A 0.0394 in1.000 mm
1R80X95X32 N/A 3.1496 in80.000 mm N/A 3.7402 in95.000 mm N/A 1.2598 in32.000 mm N/A 0.0433 in1.100 mm
Unit of Measure
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