If you’re planning your next overhead lifting project, you may be required to specify the type of sling and rigging equipment you plan on using. Understanding how to determine and use the best sling type is essential, as well as selecting the correct type of rigging hardware that will connect to that sling. The right type of lifting hook that you’ll need for your project will be determined by several factors, like the total weight of the load and the type of sling used.
At T&M Cranes, we offer high-quality products and dependable services in the overhead material handling equipment field. Our modern overhead material handling facilities serve customers throughout North America.
This article will cover the different lifting hook types that are available to use for your overhead lifting projects.
Lifting hook types, uses, and designs
There are two main ways a lifting or sling hook can be attached to the sling: using a hook with an eye at the top or a clevis at the top to make your connection to the sling. Other types of hooks exist that have a bearing or bushing at the top that swivels. We’ll explain the three different hook types in further detail below.
These types of hooks feature a chain or fittings that are welded for a permanent connection to the sling. Eye hooks offer more flexibility in terms of movement to position the hook and attach it to a load. However, an eye hook is a permanent solution. If the throat of the hook becomes damaged during use, the whole sling will have to be failed and removed from service.
There are two different types of swivel hooks: positioning swivel hooks and true swivel hooks with bearing.
- Positioning swivel hook: This type of swivel hook allows the rigger to align properly with the hood during connection to the load. It is not designed to rotate while under load and should only be used when you need to position the hook onto the pick point.
- True swivel hook with bearing: This swivel hook has a bearing on the inside that lets the hook rotate freely under the load. The top fitting swivel helps prevent twisting of the rigging.
A clevis hook may come with or without a snap lock and has a clevis and bolt or pin at the base. The clevis is a U-shaped piece featuring holes at the end of prongs to accept the clevis pin, which is similar to a bolt but only partially threaded.
This type of clevis hook can easily be removed or replaced if it’s damaged, bent, or cracked. It would not require the entire chain sling to be scrapped if damaged.
Clevis hooks can also pivot side to side for positioning when connecting to a load. However, it lacks the same flexibility and freedom of movement that eye hooks offer.
Work with T&M Cranes to find the perfect lifting crane
T&M Cranes manufacturers standard and specialized, complicated cranes for warehouses and workshops through Chicagoland and Indiana areas. We design, build, and install cranes customized for your operation, duty cycle, and facility. Our expert team is always available for ongoing inspection, service, and repair of your T&M Crane.
We ensure your overhead crane operators have the best tools to do their jobs. To learn more about our wide array of overhead crane and hoist products, contact us through our easy online form.