Providing a solid connection and mounting platform for a pump impeller can be especially challenging in underwater applications. Typical of these are agitation systems in water treatment plants that include aerators, agitators and scrapers that operate underwater 24/7 and require minimal maintenance for long periods of time. 

Specially designed submersible Overhung Load Adaptors (OHLA) from Zero-Max handle these underwater drivetrain stress conditions. Key components are designed with chrome, nickel plating, or QPQ finish to withstand harsh, corrosive underwater conditions. 

OHLA’s protect the hydraulic motor’s shaft seal and prevent seal failure, a condition often unseen until system damage occurs. Replacing damaged shaft seals is laborious and costly because multiple hydraulic components usually must be disconnected to get at the seal failure. Now, these conditions can be eliminated using Overhung Load Adaptors for protection.  

Submersible OHLA’s are one of over 1300 designs offered by Zero-Max to meet new and unusual overhung load system requirements. These designs include custom inverted bearings and multiple lubrication ports that increase the Overhung Load Adaptor’s load capacity, bearing life and smooth system performance. 

Designed for either face or foot mounting, standard Overhung Load Adaptors are available in over 50 models with input bore sizes that range from 5/8 inch to 3-1/2 inch. SAE mounts available include A, B, C, D, E and F mounts with 2 or 4 bolt mounting flanges. Overhung Load Adaptors are available with many shaft variations including splined, threaded, tapered and extended output shafts. Special input bores and housing modifications are also available. 

Manufactured to ISO 9001:2008 quality standards, Zero-Max Overhung Load Adaptors are ruggedly built with shafts precision machined from high quality 130,000 PSI Stress-proof steel. All custom Overhung Load Adaptor designs include a detailed CAD approval drawing submitted prior to manufacture. 

In addition to underwater applications, Overhung Load Adaptors are used in high heat applications and other types of difficult and hostile environment. They are widely used in more conventional applications such as workboats, recycling systems, forestry shredders, cold planers for road paving, industrial conveyor drives and many others where hydraulic systems require shaft seal protection.