![]() ![]() Just remember: a snatch block does not reduce the line pull required to move a load unless the snatch block itself can travel with the load. Not knowing these facts can lead to selecting a mounting point that isn’t strong enough, but more commonly the snatch block itself won’t be strong enough.Ī common misconception about snatch blocks is that they somehow reduce the line pull, which is true in some specific scenarios, but for the most part the only thing they do do (haha) for sure, as mentioned above, is endure increased loading and exert that extra force on whatever they are attached to. This phenomenon is exacerbated as the angle of redirection steepens, to the point where when the line gets redirected at 180°, meaning that the lines coming to/from the snatch block are parallel with one another, the anchor point will see a force equal to 2x the line pull.įor example: If the snatch block is going to be used in a 180° configuration and is going to be used to lift a 2 ton load both the snatch block and the attachment point must be capable of at least 4 tons, so it is important that the proper snatch block is selected. The amount of force on the snatch block (and its anchor point) will be equal to 1.41 times the line pull required to move the load attached to the line. Now imagine pulling on the snatch block so that it redirects the line at a 90° angle. In this unusual (and useless) arrangement, the snatch block will see no force whatsoever because again, the line is just passing straight through it. The best way to envision this phenomenon is to start by imagining a line passing straight through the snatch block. The reason for it is simple: most people tend not to know that the angle at which a snatch block redirects a line directly affects how much force the anchor point of the block will see. Snatch blocks have to be one of the most commonly overloaded pieces of rigging equipment that we sell, and it often comes down to a lack of understanding the fundamentals of how they work. A Snatch Block Pulley is simply a basic pulley that can be used to redirect a running rope or wire rope. ![]()
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