Sheave Block Considerations in a Pulley System

In many types of lifting applications, the best option involves the use of sheave blocks, also referred to as block pulley, block and tackle, or some combination of those words. The castings that contain the pulley are referred to as sheave blocks. You can have multiple separate pulleys within the casing or only a single pulley with a sheave block.

Sizing the Pulley System
Certain types of pulley and sheave block combinations can be modified. You can adjust the wire rope or other type of rope diameter to match different lifting requirements through the use of two sets of screws on each side of the system.

Some factors should be considered when choosing sheave blocks to be used in a lifting application. These include:

Load Lifting Capacity

First, find out how much weight your system will be required to lift. The weight of the load lifted by the system is directly related to the sheave block’s weight capacity rating and not only the lifting capacity of the wire rope or other type of rope. The weight limit of the sheave block must be greater than any imposed load in order to help ensure proper and safe operation of the system.

It is important to construct your system in accordance with the largest load you will need to rig in order to make sure you do not have to spend effort and time implementing upgrades to the system in the near future. Also, the amount you can lift with the system will be impacted by the diameter of the rope you use.

Type of Block
There are various types of sheave block options you can select. Prior to choosing one, understand the benefits of each block to help ensure you make the right purchase. You want one that will function in the best manner for your system and for the load you need to lift. A professional rigging product supplier can advise you with this decision.

Contact an experienced wire rope and sling company today to access the customized rigging equipment and supplies you need for your industrial lifting needs.

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