Shackles are used in lifting and static systems as removable links to connect (steel) wire rope, chain and other fittings.
Screw pin shackles are used mainly for non-permanent applications and pick and place applications. Screw pin shackles can be used for applications involving side-loading circumstances. Reduced working load limits are required for side-loading applications. See for more information Loads in this instruction sheet. While in service, do not allow the screw pin to be rotated by a life line, such as a choker application. Tighten screw pin before each pick.
Safety pin shackles are used for long-term or permanent applications or where the load may slide on the pin causing rotation of the pin. Safety pin shackles can be used in any application screw pin shackles are used. In addition. The safety pin type shackle's secondary securement system, utilizing a nut and cotter, eliminates the requirement to tighten pin before each lift or movement of load.
Chain or Dee shackles (H9, D15, H11, D10 and D11-12-13 shackles) are mainly used on one-leg systems.
Anchor, Bow or Wide body shackles (H9, H10 and H14 shackles) are used on one leg and multi-leg systems.
End-Joining, Joining and Anchor shackles (D14, D16 and D17 shackles) are used in mooring, or anchor lines.
instructions for use
For screw pins ensure that the pin is correctly screwed into the shackle eye, i.e. tighten hand-tight, then secure using a
wrench or other suitable tool so that the collar of the pin is fully seated on the shackle eye. Incorrect seating of the pin may be due to a bent pin, too tight fitting thread or misalignment of the pin holes. Do not use the shackle under these circumstances. Never replace a shackle pin except with one of the same size, type and make as it may not be suitable for the loads imposed.
Select the correct type of shackle and its Working Load Limit for the particular application. Should extreme circumstances or shock loading be applicable, this must be well taken into account on selecting the correct shackle. Make sure that the shackle is supporting the load correctly, i.e. along the axis of the shackle body centre line, avoid introduction of bending loads, unstable loads and do not apply overloads. To avoid eccentric loading of the shackle a loose spacer may be used on either end of the shackle pin.
Avoid applications where due to movement (e.g. of the load or the rope) the shackle pin can rotate and possibly be
unscrewed. If such an application is necessary or when the shackle is to be left in place for a prolonged period or where
maximum pin security is required, use a shackle with a safety bolt, nut and pin cotter pin.
Point loads: Most of the time the load bearing component that is in connection with a shackle is of a rounded shape. Point loading of shackles is allowed but the minimum diameter of a rounded component should be equal or bigger than the bow size of the shackle being used. Bigger diameters and/or flat parts (at shackle pin side) to increase contact area can be beneficial. Sharp edges should be avoided.
Side loads: Side loads should be avoided as well, as the products are not designed for this purpose. If side loads cannot be avoided, the reduction factors from below tabel must be taken into account: In-line loading is considered to be a load perpendicular to the pin and in the plane of the bow. Load angles in the table are the deviating angles from the in line loads.
When using shackles in connection with multi-leg slings, due consideration should be given to the effect of the angle between the legs of the sling. As the angle increases, so does the load in the sling leg and consequently in any shackle attached to that leg. When a shackle is used to connect two slings to the hook of a lifting device, a bow type shackle must be assembled with the slings in the shackle body and the hook engaged with the shackle pin. The angle between the slings should not exceed 120°. If symmetrically loaded the shackle may be used to the full WLL.