The different mounting options for electric motors.

An electric motor’s mounting depends on its application, with various options available to suit specific requirements. These options are detailed below.

B3 – Foot Mount

• Motor sits on flat feet and bolts to a base plate.
• Most common option; feet are cast into the frame.
• Stable, easy to install; ideal for pumps, blowers, and compressors.

B5 – Flange (D) Mount

• Large front D flange with bolt holes; no feet.
• Outer diameter of flange is larger than motor body.
• Saves floor space; perfect for direct drive to pumps or gearboxes.

B35 – Foot + Flange (D) Mount

• Motor has full-size feet and large D flange.
• Flexible mounting: use either feet or flange depending on installation.
• Fits horizontal or vertical setups; good for retrofits and replacements.

B14 – Face (C) Mount

• Motor mounts via flat front face (C face) with bolt holes; no feet.
• Compact and lightweight.
• Ideal for small pumps, fans, and limited-space installations.

B34 – Foot + Face (C) Mount

• Motor has feet and flat front face (C face) with bolt holes.
• Flexible mounting: use either feet or face depending on space and requirements.
• Suitable for pumps, fans, and retrofit applications.

V1, V3, V5 – Vertical Mount

• Motor can be installed with shaft up or down.
• Mounting possible by feet, face (C), or flange (D), depending on motor design.
• Requires thrust bearings for axial loads; rain hat recommended for outdoor protection.
• Perfect for vertical pumps, aerators, and tight spaces; maintains reliable operation.

Terminal box positions on three phase motors are either fixed to the top (standard) or positioned to the left or right through movable motor feet. ABB three phase motors have the terminal box fixed to the top when viewing from the drive end shaft. Brook Crompton motors removable feet allow the terminal box to be positioned to the top, right or left. Below are the standard and vertical mounting options with the standard top terminal box position. Terminal box and mounting information is required when specifying your motor requirements. 

STANDARD ELECTRIC MOTOR MOUNTINGS

VERTICAL ELECTRIC MOTOR MOUNTINGS (Requires application relevant components)

For more information on ABB motors click here. For Brook Cromption motors click here and their multi mount options click here.