ABOUT SHACKLES

Shackles are U-shaped pieces of metal secured with a pin or bolt across the opening, or hinged metal loops that are secured with a quick-release locking mechanism. Toolee has two  basic types of shackles, both are made of alloy steel or carbon steel. They are available in painted, galvanized or self-colored finishes and use quenched or tempered pins. Class 1 shackles pass a rounded pin through holes at the base of the shackle. A spring-actuated cotter pin or hair pin holds the butt end of the shackle in place. Class 2 shackles use screw-pins that pass through an opening on one only side of the shackle. The pins use a key-like design and exhibit extreme deformation before failure.

Selecting shackles requires an analysis of specifications and features. Dimensional specifications include: pin or bolt diameter, hole diameter, width at eyes, width at bow, width between eyes, inside length, inside width at bow, outside diameter (OD) of eye, approximate weight, and estimated weight per hundred. Some shackles use English measurements such as inches (in) or fraction of inches. Others are measured in metric units such as centimeters (cm) or millimeters (mm). Performance specifications for shackles include working load limit (WLL), the maximum laod which should ever be applied to the product under any condition, which is usually measured in tons. Toolee also supplies specialized shackles under any customized specifications or provide optional features. For example, stainless steel screw-pin anchor shackles provide improved corrosion and chemical resistance. Trawling shackles have heat-treated bodies and square headed pins that facilitate tightening and loosening. Web sling shackles may be hot-dip galvanized or zinc-plated, and provide an ultimate strength equal to four times the working load limit

Toolee Shackles are used in a variety of lifting, pulling, and tie down applications. They are subjected to magnetic particle, proof load and fatigue tests.