Vertical Hollow Shaft Motors

Vertical hollow shaft motors, sometimes shortened to VHS motors, are designed to mount directly above a vertical pump, with the pump’s drive shaft passing up through the motor’s hollow shaft rather than connecting through a separate coupling. This direct-drive arrangement is common on vertical pump motors used in deep-well, turbine, and other vertical pumping applications where minimizing coupling components simplifies alignment and reduces potential failure points. Because vertical hollow shaft pump motors often carry significant thrust loads from the pump impeller, they’re typically built with oversized thrust bearings and a non-reversing ratchet to prevent backspin during shutdown. Getting the vertical hollow shaft motor dimensions right — shaft bore, keyway, and coupling length — is critical, since these motors are matched closely to the specific pump they’ll drive. 3BG Supply Co. stocks hollow shaft motors across a range of horsepower and thrust ratings within our broader AC motors lineup.

Find the right Vertical Hollow Shaft Motors for your needs.

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    Benefits of Choosing 3BG Supply Co. for Hollow Shaft Motors

    One of our primary goals at 3BG Supply Co. is to make your buying experience as effortless as possible by breaking down the barriers between many maintenance, repair and operations (MRO) suppliers and their customers. We pride ourselves on honest and transparent communication while keeping things as simple as possible throughout the purchasing process. Our team will make you feel part of our extended family by giving you the individualized attention you deserve.

    Our online product inventory features over 300,000 part numbers, including one of the market's most comprehensive selections of electric motors and vertical hollow shaft motors. We'll work with you to find the most practical, efficient and cost-effective solution that meets your application's unique needs. After you place your initial order, we'll assign you a representative to manage your account and make the ordering process easier for future requirements.

    Shop Vertical Hollow Shaft Motors at 3BG Supply Co. Today

    If you're looking to partner with a reliable supplier that offers high-performance vertical shaft hollow motors and other MRO supplies, 3BG Supply Co. is a perfect choice. Our experts can help you select the most practical design for your unique application, whether you need a hollow shaft brushless motor for optimal efficiency or an extra-high thrust model for maximum power. Contact us online or call today to learn more.

    FAQs

    What is a vertical hollow shaft motor?

    A vertical hollow shaft motor (VHS motor) has a hollow center bore that allows a vertical pump's drive shaft to pass directly through the motor, rather than connecting through an external coupling. This design is common on deep-well, turbine, and other vertical pump installations.

    Does a vertical hollow shaft motor require a coupler?

    No — the hollow shaft design is specifically meant to eliminate the need for a separate mechanical coupler, since the pump's shaft extends directly up through the motor's bore and is secured with a coupling collar inside the hollow shaft itself. This reduces the number of components and potential misalignment points compared to a solid-shaft motor setup.

    What are typical vertical hollow shaft motor dimensions I need to check?

    The key dimensions are the hollow shaft bore diameter, keyway size, and the shaft's usable length for coupling to the pump, along with the motor's frame size and mounting bolt pattern. These need to match your specific pump manufacturer's requirements, since VHS motors are closely paired to the pump they drive.

    Why do vertical hollow shaft motors need a non-reversing ratchet?

    The ratchet mechanism prevents the motor and pump shaft from spinning backward when the motor shuts off, which would otherwise happen due to water flowing back down through the pump column under gravity. Backspin can loosen couplings or damage the pump over repeated shutdown cycles, so the ratchet protects against that wear.

    What horsepower ranges are vertical hollow shaft motors available in?

    Vertical pump motors are generally available from around 10 horsepower up through 250 horsepower for standard thrust capacity, with extra-high thrust models extending from roughly 100 up to 500 horsepower. The right rating depends on your pump's thrust load and flow requirements.

    What industries commonly use vertical hollow shaft pump motors?

    Vertical hollow shaft pump motors are common in agricultural irrigation, municipal water systems, and industrial deep-well pumping applications where a vertical turbine or submersible pump needs a directly coupled drive. Their thrust-bearing design makes them well suited to the axial loads these pump types generate.

    Industrial Vertical Hollow Shaft Motors Manufacturers