Nylatech Sheaves are 1/8th the weight of steel or iron sheaves. This improves the lifting capabilities of mobile and fixed boom cranes and eases installation. LONGER ROPE LIFE Nylatech Monomer Cast Sheaves are better suited to the “on again, off again” loading typical for this application. With enhanced material memory and resiliency, the rope

For sufficient side-loading support, minimum shoulder width (distance between the outer edge of the rim and inside the groove) should be 1/8”. Below is a table to determine the rim width based on the rope diameter, 30° groove angle, and 1/8” shoulder. The minimum thickness of the sheave at the rim (T) can be expressed as a

Jan 27, 2019 · A sheave is a pulley that has grooves in the side surface. The grooves allow the cable to run more smoothly through the sheave. Sheaves are used to increase or decrease line speed and tension. They can be used with stationary …

When designing with custom or standard sheaves, certain considerations should be observed by equipment engineers. Of special importance are groove configuration, bore configuration, bearing retention, and load capacity.

Jan 27, 2014 · Avoid changing the bending direction from one sheave to another as this reverse bending further accelerates wire fatigue. The relationship between sheave diameter and rope diameter is a critical factor that is used to estimate the …

TACKLE BLOCK – An assembly consisting of a sheave(s), side plates, and generally an end fitting (hook, sha kle, etc.) that is used for lifting, lowering, or applying tension.

e) Side Straps and Side Plates, Examine for fractures, stretching, buckling, distortion and wastage due to corrosion. Buckled or distorted side plates may allow the rope to jam between the sheave and the side or partition plate.

Sheaves are often designed with thin straight sided grooves which can cause scrubbing on the side walls and unnecessary wear on the rope and the sheave (see Figure 6).

When ropes travel onto a sheave under a fl eet angle, they will be twisted when rolling down into the bottom of the groove (Fig. 1). This twisting can lead to a twist of the hook block of the crane or cause structural da-mage (e.g., a birdcage, see Fig. 2) on a rope.

Apr 18, 2020 · Essentially, a sheave is a wheel with an open groove that a rope or cable fits around so it can rotate around the exterior. One end of the cable is attached to an item that needs to be moved, while the other is attached to a fixed object, like the base of a crane.