Mechanical Designs of Virginia, Inc.
Mechanical Designs of Virginia, Inc.
25582 Jeb Stuart Hwy.
Stuart, VA 24171
Phone: 276.694.7442
Fax: 276.694.7088
E-Mail: sales@mechanicaldesigns.com
Website: www.mechanicaldesigns.com
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Vertical or Horizontal Mounts for NEMA Motor Frames 284TC - 286TSC
Adapter
Dimensional Drawing for 28 Series Pump/Motor Adapters
Unit of Measure
1 

Item #

Item Name

Pump Flange Style

Dimension A

Maximum Coupling Diameter

Length

28-57-2/4A N/A 28 Series 3.251 Inch (in) Dimension A and 5.875 Inch (in) Length Pump/Motor Adapter N/A SAE A 2 & 4 Bolt N/A 3.251 in N/A 4.625 in N/A 5.875 in
28-57-2/4B N/A 28 Series 4.001 Inch (in) Dimension A and 5.875 Inch (in) Length Pump/Motor Adapter N/A SAE B 2 & 4 Bolt N/A 4.001 in N/A 4.625 in N/A 5.875 in
28-57-2/4C N/A 28 Series 5.001 Inch (in) Dimension A and 5.875 Inch (in) Length Pump/Motor Adapter N/A SAE C 2 & 4 Bolt N/A 5.001 in N/A 4.625 in N/A 5.875 in
28-67-2/4A N/A 28 Series 3.251 Inch (in) Dimension A and 6.875 Inch (in) Length Pump/Motor Adapter N/A SAE A 2 & 4 Bolt N/A 3.251 in N/A 4.625 in N/A 6.875 in
28-67-2/4B N/A 28 Series 4.001 Inch (in) Dimension A and 6.875 Inch (in) Length Pump/Motor Adapter N/A SAE B 2 & 4 Bolt N/A 4.001 in N/A 4.625 in N/A 6.875 in
28-67-2/4C N/A 28 Series 5.001 Inch (in) Dimension A and 6.875 Inch (in) Length Pump/Motor Adapter N/A SAE C 2 & 4 Bolt N/A 5.001 in N/A 4.625 in N/A 6.875 in
28-77-2/4A N/A 28 Series 3.251 Inch (in) Dimension A and 7.875 Inch (in) Length Pump/Motor Adapter N/A SAE A 2 & 4 Bolt N/A 3.251 in N/A 4.500 in N/A 7.875 in
28-77-2/4B N/A 28 Series 4.001 Inch (in) Dimension A and 7.875 Inch (in) Length Pump/Motor Adapter N/A SAE B 2 & 4 Bolt N/A 4.001 in N/A 4.500 in N/A 7.875 in
28-77-2/4C N/A 28 Series 5.001 Inch (in) Dimension A and 7.875 Inch (in) Length Pump/Motor Adapter N/A SAE C 2 & 4 Bolt N/A 5.001 in N/A 4.500 in N/A 7.875 in
28-85-2/4B N/A 28 Series 4.001 Inch (in) Dimension A and 8.625 Inch (in) Length Pump/Motor Adapter N/A SAE B 2 & 4 Bolt N/A 4.001 in N/A 4.500 in N/A 8.625 in
28-85-2/4C N/A 28 Series 5.001 Inch (in) Dimension A and 8.625 Inch (in) Length Pump/Motor Adapter N/A SAE C 2 & 4 Bolt N/A 5.001 in N/A 4.500 in N/A 8.625 in
Unit of Measure
1