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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-21-N N/A 1.3125 in N/A 2.1875 in N/A 1.000 in N/A 1.010 in N/A 3/32 in N/A MR-26-N
MI-21 N/A 1.3125 in N/A 2.1875 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-26
MI-22-4S N/A 1.3125 in N/A 2.1875 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-26
MI-24-N N/A 1.5000 in N/A 2.3125 in N/A 1.000 in N/A 1.010 in N/A 3/32 in N/A MR-28-N
MI-22 N/A 1.3750 in N/A 2.3125 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-28
MI-23 N/A 1.4375 in N/A 2.3125 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-28
MI-24 N/A 1.5000 in N/A 2.3125 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-28
MI-25-4S N/A 1.5625 in N/A 2.4375 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-30
MI-26-2S N/A 1.6250 in N/A 2.5000 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-31
MI-26-N N/A 1.6250 in N/A 2.5625 in N/A 1.000 in N/A 1.010 in N/A 3/32 in N/A MR-32-N
MI-25 N/A 1.5625 in N/A 2.5625 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-32
MI-26 N/A 1.6250 in N/A 2.5625 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-32
MI-27 N/A 1.6875 in N/A 2.5625 in N/A 1.250 in N/A 1.260 in N/A 3/32 in N/A MR-32
MI-28-N N/A 1.7500 in N/A 3.0000 in N/A 1.500 in N/A 1.510 in N/A 1/8 in N/A MR-36-N
MI-28 N/A 1.7500 in N/A 3.0000 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-36
MI-30 N/A 1.8750 in N/A 3.0000 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-36
MI-32-N N/A 2.0000 in N/A 3.2500 in N/A 1.500 in N/A 1.510 in N/A 1/8 in N/A MR-40-N
MI-31 N/A 1.9375 in N/A 3.2500 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-40
MI-32 N/A 2.0000 in N/A 3.2500 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-40
MI-34 N/A 2.1250 in N/A 3.2500 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-40
MI-36-N N/A 2.2500 in N/A 3.5000 in N/A 1.500 in N/A 1.510 in N/A 1/8 in N/A MR-44-N
MI-35 N/A 2.1875 in N/A 3.5000 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-44
MI-36 N/A 2.2500 in N/A 3.5000 in N/A 1.750 in N/A 1.760 in N/A 1/8 in N/A MR-44
MI-40-N N/A 2.5000 in N/A 3.7500 in N/A 1.500 in N/A 1.510 in N/A 1/8 in N/A MR-48-N
MI-38 N/A 2.3750 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
Unit of Measure
1 2 3 4