Shackle

A shackle ( colloquially Kuhmaul shackle or hook ) is a U-shaped, with a screw or plug bolt lockable bracket for connecting two parts.

Application

Shackles are mainly used to absorb tensile forces in the transition from ropes, wire ropes or chains to fixed components. The bolts are often secured with nuts or cotter pins. The use of a shackle allows easier replacement of a broken wire rope or a chain. By the curved shape, a certain mobility of the connection is ensured.

Shackles are mainly used in the shipping industry, but also in material handling and mechanical engineering.

Manufacturing is a shackle mostly from steel or stainless steel. As manufacturing processes such as casting and forging are suitable.

Bow shackles

Are standardized shackle for example, in DIN 82016 as curly Cargo shackles. It is a place of the form ( A: with bolt and nut: with screwed into the shackle eye bolt and form B ) distinction, but also the nominal sizes. These range from 80 kN (8 t) to 1,000 kN (100 t) than standard sizes. The most important measurements are the internal width, the clear height and diameter of the bolt.

Dee shackles

Another form have the straight shackle listed in the standard DIN 82101. These are in the forms A: 100 manufactured with bolt with nut - 1 - 20 and 25: 0.06 -: - 20 with screwed into the shackle eye bolt, Form B 0.4 20 with countersunk bolts and Form C.

High-strength shackle

There are also shackle from highly durable material, which have a smaller size and lower weight with the same load capacity. For exceptionally high loads and high-strength shackle for payloads over 1,000 tonnes are produced. If the connection has to be solved frequently, carabiner or snap shackles are mostly used.

Use of large shackles on the crane

Snap shackle

Rope Shackle

Rope shackles are in contrast to the traditional shackles made ​​of Kunstfasertauwerk. Usually in a short line piece ( about 1 m) is spliced ​​to an eye of single braid at one end and tied a diamond knot at the other end. Now, if the node inserted into the eye, pulls this to under load and thus forms a very light and strong rope shackles. A material used is Dyneema, a polyethylene fiber that is four times stronger than steel at the same weight 12. Dyneema is well suited to production of particularly light shackle that even swim.