These blocks are usually used in Fishing applications. A snatch block has a side plate sometimes called a cheek plate, that can be opened for easy insertion of cable without having to remove the load or fittings from the end of the wire. The process of inserting a line into a block is called reeving.
A pulley system is used in conjunction with wire rope or other types of rigging ropes, and can be opened on one side to quickly and easily insert a wire rope without having to remove the load or change the direction of the cable, by looping the rope through the pulley (around the sheave) several times before hooking to the object.
China LG Supply offers to snatch blocks to fit various marine projects. They feature steel and wooden styles.
Most of the Pulley blocks for fishing and trawling are wooden snatch blocks, of which there are single sheaves, double sheaves and triple sheaves in terms of the number of sheaves. The other end of the snatch block is also available in various forms, including eye, hook, swivel hook, swivel eye, shackle, and a type of shackle that can be assembled later on without any attachment parts.
Of course, there is more than just wooden snatch blocks for fishing and trawling, there are also steel pulleys, which generally have Eye, hook and other attachment fittings and are finished with electro-galvanized, hot-dip galvanized, powder coated, etc. to protect the outside of the pulley from corrosion to a certain extent.
When used with a winch, there is a lot of force passing through the Snatch block and the pressure on the rope can be twice the actual load being towed. If the pressure is too high and the load is too high, the Snatch block can fail and subsequently fail, which can have a slingshot effect and cause significant damage. It is therefore essential that the equipment is set up correctly and that all components are connected safely. Of course, the anchor itself must also be very secure and safe.
It is important to follow safety procedures when using the Snatch block, which can be dangerous if used incorrectly.
If you are considering purchasing a snatch block or pulley block, please feel free to contact LG RIGGING and we will go out of our way to help you.