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Overhung Load Adaptors

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Overhung load adapters are hydraulic system components that protect shaft seals and prevent breakdown by absorbing internal and external stress from the motor and pump. They also seal out grease and grime to protect motor components and prevent contamination of hydraulic fluid. SAE overhung load adaptors prevent costly damage to shaft seals and are used for fan drives, recycling equipment, mixer units, industrial conveyor drives, and various other hydraulic motor applications.

Overhung Load Adaptors in Standard and Custom Configurations

The first complete line of SAE “A” through SAE “F” mount overhung load adaptors was designed by Zero-Max and set the industry standard for OHLA design. From the smallest Model 200 SAE “A” mount to the largest Model 1500 SAE “F” mount, our overhung load adapters are designed for high performance and provide the following features:
  • A, B, C, D, E and F SAE mount options and a non-SAE mount option
  • Attractively painted, rugged cast iron housings
  • 130,000 PSI stress-proof steel shafts
  • Ball or tapered roller bearings
  • A variety of shaft options, including spline shafts
  • Face or foot-mounted models with 2- or 4-bolt mounting options
  • Input bore sizes from 5/8-in. to 3-1/2-in.

We also offer many custom options for overhung load adapters and can create a special design for your application when needed.

Our in-stock standard load adaptors are available for immediate shipment. Request a quote for any of our overhung load adaptor options listed below or contact us to discuss your custom requirements.


Overhung Load Adapters Provide Several Important Benefits

Overhung load adapters from Zero-Max are designed using the latest technology and provide a range of benefits, including:
  • Eliminates premature motor or pump failure due to overhung loads (axial and radial) on your motor or pump shaft
  • Prevents contamination of hydraulic fluid in harsh environments
  • Provides a solid, permanent mounting surface
  • Permits the removal of hydraulic motors for servicing without disturbing driven gears, pulleys or sprockets
  • Seals out dirt and grime
  • Removes radial loads from hydraulic motors and pumps – technology for the agriculture, forestry, and road construction markets

Overhung Load Adaptors for Hydraulic Motors and Pumps

The majority of Zero-Max’s OHLA meet SAE size designations except for our Model 400, which meets non-SAE motor requirements. Selecting the right overhung load adaptor depends on the RPM of your motor or pump, as well as the bolt pattern and pilot diameter. See the individual product descriptions below for additional details.

Non-SAE load adaptors

These OHLAs feature 4-bolt mounting, deep-grooved ball bearings and accept speeds up to 3800 RPM. Compatible with motor and pump shafts up to 1” diameter and can be either face-mounted or foot-mounted. Options for non-SAE series OHLA include:
  • Accepts speeds up to 3800 RPM
  • Deep-grooved ball bearings
  • 4-bolt mount
  • Input bore diameters of 1" keyed or 1" through-bore.

SAE A Mount Overhung Load Adaptors

Our SAE A OHLA options include 2- and 4-bolt mounting options with deep-grooved ball bearings or heavy-duty tapered roller bearings, depending on the model selected.
 
Model 200 SAE A OHLA
Model 200 overhung load adaptors are compatible with shaft diameters up to 1” and provide the following features:
  • Accepts speeds up to 3800 RPM
  • Deep-grooved ball bearings
  • 2-bolt mount
  • Input bore dimensions including 1” keyed, 5/8” keyed, 3/4” keyed and 9 tooth 16/32 spline
Model 300 SAE A OHLA
Model 300 overhung load adaptors are designed for medium to heavy-duty applications and provide the following features:
  • Accepts speeds up to 3100 RPM
  • Deep-grooved ball bearings
  • 2-bolt mount
  • Input bore diameters of 1-1/4" keyed or 1-1/4" through-bore.
Model 500 SAE A OHLA
Our model 500 overhung load adapters are designed for heavy-duty applications and provide the following features:
  • Accepts speeds up to 2300 RPM
  • Heavy-duty tapered roller bearings
  • 4-bolt mounting with optional 2-bolt mounting
  • Input bore diameters of 1-1/4" keyed, 1"-6B spline, or 14 tooth 12/24 spline

SAE B Mount Overhung Load Adaptors

Model 600 SAE B mount overhung load adapters are offered in several configurations and provide the following features:
  • Accepts speeds up to 2300 RPM
  • Heavy-duty tapered roller bearings
  • 2-bolt or 4-bolt mounting options
  • 7/8", 1", or 1-1/4" keyed; 13 tooth 16/32 spline, or 15 tooth 16/32 spline input bores

Model 650, Heavy-Duty, SAE B mount overhung load adapters are ideal for the most extreme requirements:

  • Accepts speeds up to 3500 RPM
  • Heavy-duty spherical roller bearings
  • 2-bolt or 4-bolt mounting options
  • 13 tooth 16/32 spline, or 15 tooth 16/32 spline input bores

SAE C Mount Overhung Load Adaptors

Our C mount SAE overhung load adaptors are offered two models that are available in several input bore and output shaft sizes. 
 
Model 800 SAE C OHLA
The model 800 overhung load adaptor is designed for C-mount motor and pump applications and has the following features:
  • Accepts speeds up to 2300 RPM
  • Heavy-duty tapered roller bearings
  • 2-bolt or 4-bolt mount options
  • Input bore diameters including 14 tooth 12/24 spline, 7/8" keyed shaft, 1" keyed shaft and 1-1/4 keyed shaft 
Model 900 SAE C OHLA
Model 900 overhead load adapters are made for C-C mount motor and pump applications and provide the following features:
  • Accepts speeds up to 1900 RPM
  • Heavy-duty tapered roller bearings
  • 2-bolt or 4-bolt mount options
  • Input bore diameter options include 14 tooth 12/24 spline, 17 tooth 12/24 spline, 1-1/2 - 3/8 x 3/16 keyed shaft and 1-3/4 - 7/16 x 7/32 keyed shaft 

SAE D Mount Overhung Load Adaptors

D mount OHLA are available in two options. They are designed for heavy-duty SAE “D” mount motor and pump applications and provide the following features:
  • Accepts up to 2500 RPM
  • Heavy-duty tapered roller bearings
  • 1-3/4" keyed, or 13 tooth 8/16 spline standard input bores

SAE E Mount Overhung Load Adaptors

Our SAE E mount OHLA are similar to F mounts but with customer-specific input bores up to 2-1/2” diameter. They are designed for heavy-duty applications and provide the following features:
  • Accepts speeds up to 1500 RPM
  • Heavy-duty, spherical roller bearings

SAE F Mount Overhung Load Adaptors

SAE F mount overhung load adaptors are the same size as E mount OHLA but with a different bolt circle and polit diameter. Features include:
  • Accepts speeds up to 1500 RPM
  • Heavy-duty, spherical roller bearings
  • Output shaft up to 3-1/2” diameter based on customer specifications
  • Special inputs and outputs available

Double-Male Overhung Load Adaptors

Double-Male overhung load adaptors are available in different sizes and are designed to simplify set-up and installation, provide protection from external contamination, and provide for support of overhung loads both radially and axially. Features include:
  • Standard Models with SAE B or SAE C Housings
  • 2-bolt or 4-bolt mounting; either face-mounted or foot-mounted
  • Heavy-Duty tapered roller bearings
  • Special inputs and outputs available

Contact Us to Discuss Your Overhung Load Adaptor Requirements

For more information on custom or standard overhung load adapters with SAE mounts, contact us or click here to find your local sales representative.

With several SAE and non-SAE models to choose from, we have an Overhung Load Adaptor to suit your needs. Choose an industry below to explore application-specific uses and benefits.