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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Ultra-Class Four Bolt Flanged Unit with Set Screw
Ultra-Class Four Bolt Flanged Unit with Set Screw, ARFU Type - Dimensions
Unit of Measure
1 2 3 4 5 

Item #

d

L

J

A

A0

A1

Lubrication

Ball Material

Outside Diameter 

Outside Diameter

Bore Type

Outside Ring Width

Inside Ring Width

Clearance

Cage Material

Precision Rating

Radial Dynamic Load Rating

Radial Static Load Rating

Rotational Speed [Max]-Grease

UCFU-2.1/16 N/A 2-1/16 in52.388 mm N/A 6.4063 in162.7 mm N/A 5.125 in130.2 mm N/A 1.9375 in49.2 mm N/A 2.5313 in64.300 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.1/2R N/A 2-1/2 in63.500 mm N/A 7.3750 in187.3 mm N/A 5.8594 in148.8 mm N/A 2.3125 in58.7 mm N/A 3.0625 in77.800 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.1/4 N/A 2-1/4 in57.150 mm N/A 6.8750 in174.6 mm N/A 5.625 in142.9 mm N/A 2.0938 in53.2 mm N/A 2.9063 in73.800 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.1/8 N/A 2-1/8 in53.975 mm N/A 6.4063 in162.7 mm N/A 5.125 in130.2 mm N/A 1.9375 in49.2 mm N/A 2.5313 in64.300 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.11/16 N/A 2-11/16 in68.263 mm N/A 7.5938 in192.9 mm N/A 5.875 in149.2 mm N/A 2.4375 in61.9 mm N/A 3.2441 in82.400 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.11/16R N/A 2-11/16 in68.263 mm N/A 7.5938 in192.9 mm N/A 5.875 in149.2 mm N/A 2.4375 in61.9 mm N/A 3.2500 in82.600 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.13/16 N/A 2-13/16 in71.438 mm N/A 7.8750 in200.0 mm N/A 6 in152.4 mm N/A 2.5625 in65.1 mm N/A 3.3594 in85.300 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.15/16 N/A 2-15/16 in74.613 mm N/A 7.8750 in200.0 mm N/A 6 in152.4 mm N/A 2.5625 in65.1 mm N/A 3.3594 in85.300 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.3/16 N/A 2-3/16 in55.563 mm N/A 6.4063 in162.7 mm N/A 5.125 in130.2 mm N/A 1.9375 in49.2 mm N/A 2.5313 in64.300 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.3/16MFG1 N/A 2 in50.800 mm N/A 6.4063 in162.7 mm N/A 5.125 in130.2 mm N/A 1.9375 in49.2 mm N/A 1.5313 in64.300 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.3/4R N/A 2-3/4 in69.850 mm N/A 7.5938 in192.9 mm N/A 5.875 in149.2 mm N/A 2.4375 in61.9 mm N/A 3.2500 in82.600 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.3/8 N/A 2-3/8 in60.325 mm N/A 6.8750 in174.6 mm N/A 5.625 in142.9 mm N/A 2.0938 in53.2 mm N/A 2.9063 in73.800 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.5/16 N/A 2-5/16 in58.738 mm N/A 6.8750 in174.6 mm N/A 5.625 in142.9 mm N/A 2.0938 in53.2 mm N/A 2.9063 in73.800 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.5/8R N/A 2-5/8 in66.675 mm N/A 7.5938 in192.9 mm N/A 5.875 in149.2 mm N/A 2.4375 in61.9 mm N/A 3.2500 in82.600 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.7/16 N/A 2-7/16 in61.913 mm N/A 6.8750 in174.6 mm N/A 5.625 in142.9 mm N/A 2.0938 in53.2 mm N/A 2.9063 in73.800 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.7/16MFG1 N/A 2-7/16 in61.913 mm N/A 6.8750 in174.6 mm N/A 5.625 in142.9 mm N/A 2.0938 in53.2 mm N/A 2.9063 in73.800 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.7/8 N/A 2-7/8 in73.025 mm N/A 7.8750 in200.0 mm N/A 6 in152.4 mm N/A 2.5625 in65.1 mm N/A 3.3594 in85.300 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2.9/16R N/A 2-9/16 in65.088 mm N/A 7.3750 in187.3 mm N/A 5.8594 in148.8 mm N/A 2.3125 in58.7 mm N/A 3.0625 in77.800 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-20 N/A 25/32 in20.000 mm N/A 3.3750 in85.7 mm N/A 2.5 in63.5 mm N/A 1.1563 in29.4 mm N/A 1.4688 in37.300 mm N/A 0.5938 in15.1 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-25 N/A 31/32 in25.000 mm N/A 3.7813 in96.0 mm N/A 2.75 in69.9 mm N/A 1.1875 in30.2 mm N/A 1.5313 in38.900 mm N/A 0.5938 in15.1 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2M/LP03 N/A 2 in50.800 mm N/A 6.4063 in162.7 mm N/A 5.125 in130.2 mm N/A 1.9375 in49.2 mm N/A 2.5313 in64.300 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2M/LP06 N/A 2 in50.800 mm N/A 6.4063 in162.7 mm N/A 5.125 in130.2 mm N/A 1.9375 in49.2 mm N/A 2.5313 in64.300 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2MFG1 N/A 2 in50.800 mm N/A 6.4063 in162.7 mm N/A 5.125 in130.2 mm N/A 1.9375 in49.2 mm N/A 2.5313 in64.300 mm N/A 0.8125 in20.6 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-2S N/A 2 in50.800 mm N/A 5.6563 in143.7 mm N/A 4.375 in111.1 mm N/A 1.8125 in46.0 mm N/A 2.3906 in60.700 mm N/A 0.7813 in19.8 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
UCFU-3 N/A 3 in76.200 mm N/A 7.8750 in200.0 mm N/A 6 in152.4 mm N/A 2.5625 in65.1 mm N/A 3.3594 in85.300 mm N/A 0.875 in22.2 mm N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Unit of Measure
1 2 3 4 5