How to Select the Right Chain Hoist for Your Application

CONTROL VOLTAGE

In line with the above question, you will need to determine which control voltage you prefer to send to the handheld pendant. This is usually one of two options, 115 volt or 24 volt. If possible, 24 volt is the desired option for safety.

PENDANT CONTROL CABLE LENGTH

The pendant control cable length is known as “push button drop” in the lifting industry. This is how far down from the chain hoist you would like the hand control to hang in the air. Standard push button drop is equal to 1m less than the lift. Using the example above, if you have 6m of lift, the standard hand pendant or push button drop will be 5m below the chain hoist, or 1m above the floor in this application.

There are times when the pendant drop will have to be a special length, and not the standard 1 metre less than lift. For example, some applications call for a chain hoist to lift an item from a hole in the floor that goes below floor level. In this situation you could have 10m of lift, but the factory floor may be only 6 metres below the where the hoist hangs. If we applied the standard rule, our pendant drop would be 9m below the chain hoist, but that means the operator standing at 6m below the chain hoist will have 3m of extra cable dragging on the floor, a serious safety hazard. In this instance, the pendant drop would deviate from the standard and we would specially order the drop to be 5m so the pendant hangs 1m above the factory floor, an ergonomic position for most people. Radio control options are now readily available which will eliminate the pendant altogether.

TYPE OF SUSPENSION

There are two common options for suspending or hanging a chain hoist, Hook mount or Lug mount. With Hook mount, the chain hoist will come from the factory with a hook attached to the top of the body. This hook will rest inside an opening on the trolley, a rolling device that rests on the Beam (explained in greater detail below).

There are two common types of hooks available, rigid and swivel. The rigid hook is just as it sounds, it does not swivel and therefore the chain hoist can not rotate 360 degrees on the trolley as in the case with a “swivel” hook. The swivel hook is also just as it sounds, allowing for the chain hoist to spin clockwise or counter-clockwise during operation.

Next is the Lug suspension option. A lug suspension is available on almost all chain hoists, and becomes particularly useful when there is limited headroom for mounting and operating the hoist. A lug suspension forgoes the hook we discussed above, and makes the hoist mountable to the trolley with just a couple of bolts/lugs.

TYPE OF TROLLEY

There are a few different options when choosing a trolley, but first lets define what a trolley is. A trolley is a device that rests and rolls along the Beam your chain hoist will operate from. There are 3 common types of trolleys.

PUSH/PULL TROLLEY
A plain trolley is the simplest form of trolley available. As discussed above, the hoist will hang from this trolley by either a hook or lug mount. A plain trolley will move the chain hoist along the Beam by human power via the hoist operator. The operator will grab either the hook or the item being lifted and pull or push the item to move it in the desired direction along the Beam. Typically utilised for loads below 2 tonne.

GEARED TROLLEY
A geared trolley is the next step up in ergonomics. With this option, the chain hoist operator will pull on a chain hanging from the trolley (much like a manual overhead door operator), and the trolley will use it’s gears to roll the trolley wheels along the Beam instead of human push/pull power as we discussed with the plain trolley. When ordering a geared trolley, one must specify the hand chain drop required. Standard hand chain drop is 1m less than lift height, similar to the pendant station or push button drop we discussed earlier.

MOTORISED TROLLEY:
The motorized trolley option is the most ergonomic of all the options we’ve covered. This option is exactly what it sounds like, instead of a plain push/pull trolley, or manual geared trolley, this trolley will have a motor attached to the side of the trolley wheels. A motorized trolley can have it’s own control pendant that will hang down from the beam in close proximity to the chain hoist pendant.

TYPE OF BEAM

There are three common types of beams in which we can use to hang a hoist. Correctly identifying your type of beam is imperative to ensuring your chosen trolley will operate and roll properly.

I-BEAM:
An I-beam, also known as an Universal Beam (UB) or Universal Columns (UC) is a beam with an I- or H-shaped cross-section. The horizontal elements of the “I” are flanges, while the vertical element is the web. The web resists shear forces while the flanges resist most of the bending moment experienced by the beam. Beam theory shows that the I-shaped section is a very efficient form for carrying both bending and shear loads in the plane of the web.