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

1R25X29X30 N/A 0.9843 in25.000 mm N/A 1.1417 in29.000 mm N/A 1.1811 in30.000 mm N/A 0.0118 in0.300 mm
1R25X30X12.5 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.4921 in12.500 mm N/A 0.0118 in0.300 mm
1R25X30X16 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.6299 in16.000 mm N/A 0.0118 in0.300 mm
1R25X30X16.5 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.6496 in16.500 mm N/A 0.0118 in0.300 mm
1R25X30X17 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.6693 in17.000 mm N/A 0.0118 in0.300 mm
1R25X30X18 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.7087 in18.000 mm N/A 0.0118 in0.300 mm
1R25X30X20 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.7874 in20.000 mm N/A 0.0118 in0.300 mm
1R25X30X20.5 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.8071 in20.500 mm N/A 0.0118 in0.300 mm
1R25X30X23 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 0.9055 in23.000 mm N/A 0.0118 in0.300 mm
1R25X30X26 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 1.0236 in26.000 mm N/A 0.0118 in0.300 mm
1R25X30X26.5 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 1.0433 in26.500 mm N/A 0.0118 in0.300 mm
1R25X30X30 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 1.1811 in30.000 mm N/A 0.0118 in0.300 mm
1R25X30X32 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 1.2598 in32.000 mm N/A 0.0118 in0.300 mm
1R25X30X38.5 N/A 0.9843 in25.000 mm N/A 1.1811 in30.000 mm N/A 1.5157 in38.500 mm N/A 0.0118 in0.300 mm
1R25X32X22 N/A 0.9843 in25.000 mm N/A 1.2598 in32.000 mm N/A 0.8661 in22.000 mm N/A 0.0236 in0.600 mm
1R25X32X30.5 N/A 0.9843 in25.000 mm N/A 1.2598 in32.000 mm N/A 1.2008 in30.500 mm N/A 0.0236 in0.600 mm
1R260X285X60 N/A 10.2362 in260.000 mm N/A 11.2205 in285.000 mm N/A 2.3622 in60.000 mm N/A 0.0787 in2.000 mm
1R260X290X100 N/A 10.2362 in260.000 mm N/A 11.4173 in290.000 mm N/A 3.9370 in100.000 mm N/A 0.0827 in2.100 mm
1R280X305X69 N/A 11.0236 in280.000 mm N/A 12.0079 in305.000 mm N/A 2.7165 in69.000 mm N/A 0.0787 in2.000 mm
1R280X310X100 N/A 11.0236 in280.000 mm N/A 12.2047 in310.000 mm N/A 3.9370 in100.000 mm N/A 0.0827 in2.100 mm
1R28X32X17 N/A 1.1024 in28.000 mm N/A 1.2598 in32.000 mm N/A 0.6693 in17.000 mm N/A 0.0118 in0.300 mm
1R28X32X20 N/A 1.1024 in28.000 mm N/A 1.2598 in32.000 mm N/A 0.7874 in20.000 mm N/A 0.0118 in0.300 mm
1R28X32X23 N/A 1.1024 in28.000 mm N/A 1.2598 in32.000 mm N/A 0.9055 in23.000 mm N/A 0.0118 in0.300 mm
1R28X32X30 N/A 1.1024 in28.000 mm N/A 1.2598 in32.000 mm N/A 1.1811 in30.000 mm N/A 0.0118 in0.300 mm
1R29X32X13 N/A 1.1417 in29.000 mm N/A 1.2598 in32.000 mm N/A 0.5118 in13.000 mm N/A 0.0118 in0.300 mm
Unit of Measure
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