Materials in Motion

To Motorize or Not to Motorize

One of the many benefits of Spanco products is the motorization package option. As a Regional Sales Manager, I have many customers ask me whether or not they should consider motorization when purchasing a crane. In this article, I will go over some of the benefits of motorization and some applications where motorization would be useful. I hope this article provides the information you need to decide if motorization is right for your material handling application.

We offer motorization on many of our Spanco Jib, Gantry, and Workstation Crane Systems. Motorization allows a worker to use a traveling pendant, or more commonly, a wireless remote to operate a crane when motorization is required. But how do you determine when motorization is necessary? Many people recognize crane capacity as a determining factor when considering motorization, but there are other factors as well, including the application and the size of the system. Just because a crane lifts 10 tons doesn’t necessarily mean it needs to be motorized if the application and the size allow the crane to be used manually.

Applications

The specific application where a system will be used is an important factor when considering motorization. One example of an application that may require motorization is a situation where the worker cannot move the load under the hoist manually due to the pure physical size of the piece being handled. If the load prevents a worker from accessing a safe point to move the system manually, he or she will require a motorized system.

Another scenario requiring motorization occurs when a load must travel to an area blocked by a physical obstacle, such a rack, machine, or other large object. In this type of application, motorization allows the worker to control the movement remotely and navigate the load over or around the obstruction. Our Spanco Workstation Bridge Cranes or
PF-Series Gantry Cranes are often used in this type of application where there may be multiple work areas with machines or equipment between them.

System Size

For many workstations, gantries, and some jibs, the height of the system will  often determine whether the system will need to be motorized. Spanco PF-Series Gantry Cranes can be ordered standard with a height under beam (HUB) up to 35 feet, and our Ceiling-Mounted Workstation Systems can be flush-mounted to a suitable building structure with a HUB up to 40 feet. As the height of the hoist trolley increases, the load becomes more difficult to move. For systems with high clearances, the motorization package keeps the system user-friendly and ergonomic.

For systems with a high HUB, motorization should be considered as a part of the complete material handling solution. As a general rule of thumb, I always look at the capacity and span of any system with a trolley clevis height over 18 feet to determine the combined weights of the load and the system. If the combination of height and weight would cause difficulty in moving the load manually, I recommend installing a motorization package.

 

Jib Cranes

Jib crane motorization applications apply to the same scenarios as above, but also offer some solutions that workstation bridge cranes and gantry cranes can’t. Jib cranes have only one point of contact with the ground, unlike a gantry that requires two legs, or a workstation that requires at least four columns. One situation where this feature makes a big difference is in mounting to the side of a large wall or building structure that requires you to swing the load out and move the load to a lower level. The worker cannot physically swing the load out when it is suspended over a lower level, so motorization is required to rotate the boom.

Motorization can also be necessary when workers need to rotate the jib crane with the load close to the mast. Because the leverage is lower when the load is closer to the mast, the force needed to rotate the boom may be too great for a worker to move it manually. A motorized jib will make the system much more user-friendly and allow the worker to rotate the load without the risk of over-exertion.

 

Changing Your Mind

One of the beneficial design features of some Spanco material handling systems is the ability to motorize a system after installation. If you purchase a Spanco Workstation System without a motorization package and you realize later that your application isn’t suited for manual operation, you can easily add the motorization option.

With jib cranes, if you are working mostly at the tip of the jib, the jib boom typically provides enough leverage to allow a worker to move the load manually. However, the leverage offered by the boom is not always enough, depending on the application. If you opt for a system without motorization and later discover that the jib crane does require motorization, Spanco offers a retrofit drive unit, which allows you to add motorization to the system after installation. Additionally, Spanco can sometimes offer these retrofit drive units for some jib cranes from other manufacturers.

 

At the end of the day, safety and worker ergonomics should be the focus when it comes to applying material handling products to all lifting applications. If adding motorization to your system will improve worker safety and efficiency, it could be a great option for your Spanco Jib, Gantry, or Workstation Crane. If you have any questions, reach out to your local Spanco regional sales manager to help you apply our product for your material handling needs.

About the Author

Tim Bambrick holds a degree in Mechanical Engineering from Thaddeus Stevens College and has spent 15 years in the material handling, fall protection, and safety industries. Tim has extensive industry experience ranging from working as an Engineer to working in a product development role for multiple companies. Tim is currently the Regional Sales Manager for the Mid-Atlantic and Eastern Canada territory for both Spanco and Rigid Lifelines.