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Emerson Bearing Company
201 Brighton Avenue
Boston, MA 02134
Phone: (800) 225-4587 • Fax: (800) 252-1996
Email: info@emersonbearing.com
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Outer Ring and roller assembly with separable inner ring
Outer ring and roller assemblies and associated inner rings are packed and shipped separately. For a complete bearing, Specify both outer and inner numbers desired.
MR Series
Unit of Measure
1 2 3 4 

Inner Ring Part No.

(B) Shaft Diameter

(D) Dimension

(W) Dimension

(W1) Dimension

(H) Hole Dia.

Complete Assembly Item #

MI-39 N/A 2.4375 in N/A 3.7500 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-48
MI-40 N/A 2.5000 in N/A 3.7500 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-48
MI-42 N/A 2.6250 in N/A 4.2500 in N/A 1.750 in N/A 1.760 in N/A 3/16 in N/A MR-52
MI-44 N/A 2.7500 in N/A 4.2500 in N/A 1.750 in N/A 1.760 in N/A 3/16 in N/A MR-52
MI-48-N N/A 3.0000 in N/A 4.5000 in N/A 1.750 in N/A 1.760 in N/A 3/16 in N/A MR-56-N
MI-46 N/A 2.8750 in N/A 4.5000 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-56
MI-47 N/A 2.9375 in N/A 4.5000 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-56
MI-48 N/A 3.0000 in N/A 4.5000 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-56
MI-50 N/A 3.1250 in N/A 4.7500 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-60
MI-52 N/A 3.2500 in N/A 4.7500 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-60
MI-54 N/A 3.3750 in N/A 5.0000 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-64
MI-56 N/A 3.5000 in N/A 5.0000 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-64
MI-58 N/A 3.6250 in N/A 5.2500 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-68
MI-60 N/A 3.7500 in N/A 5.2500 in N/A 2.000 in N/A 2.010 in N/A 3/16 in N/A MR-68
MI-62 N/A 3.8750 in N/A 6.0000 in N/A 2.250 in N/A 2.260 in N/A 3/16 in N/A MR-72
MI-64 N/A 4.0000 in N/A 6.5000 in N/A 2.250 in N/A 2.260 in N/A 3/16 in N/A MR-80
MI-68 N/A 4.2500 in N/A 6.5000 in N/A 2.250 in N/A 2.260 in N/A 3/16 in N/A MR-80
MI-72-N N/A 4.5000 in N/A 7.0000 in N/A 2.500 in N/A 2.515 in N/A 3/16 in N/A MR-88-N
MI-72 N/A 4.5000 in N/A 7.0000 in N/A 3.000 in N/A 3.015 in N/A 3/16 in N/A MR-88
MI-80-N N/A 5 in N/A 7.5000 in N/A 2.500 in N/A 2.515 in N/A 1/4 in N/A MR-96-N
MI-80 N/A 5 in N/A 7.5000 in N/A 3.000 in N/A 3.015 in N/A 1/4 in N/A MR-96
MI-88-N N/A 5.5000 in N/A 8.0000 in N/A 2.500 in N/A 2.515 in N/A 1/4 in N/A MR-104-N
MI-88 N/A 5.5000 in N/A 8.0000 in N/A 3.000 in N/A 3.015 in N/A 1/4 in N/A MR-104
MI-96 N/A 6 in N/A 9.1250 in N/A 3.000 in N/A 3.015 in N/A 1/4 in N/A MR-116
MI-104 N/A 6.5000 in N/A 9.6250 in N/A 3.000 in N/A 3.015 in N/A 1/4 in N/A MR-124
Unit of Measure
1 2 3 4