Linatex cast nylon sheaves are placed on a wide variety of lifting equipment. They often replace sheaves made of cast iron or steel. Today our sheaves can be found on nearly any type of crane including gantry, tower, rough terrain, crawler, truck and pedestal cranes. They are also used, in equipment for the wire drawing and cable stranding industries, on forklifts, telehandlers, drill rigs and in many other mechanical systems.
Wire rope (wire cable) is an important and highly stressed component in material handling equipment. The useful lifetime of wire rope is mostly determined by fatigue, Hertzian pressure between wire rope and sheave, and external conditions such as line pull, sheave diameter, groove proﬁle and sheave material.
In contrast to most other machine components wire rope must be replaced before it fails. In order to extend wire rope life, sheaves or sheave grooves made of cast nylon are used. Sheaves are very wear resistant and do not stress the outer strands of the rope nearly as much as steel sheaves. Standard wire rope rests in the groove of a steel sheave on point contacts only, resulting in high speciﬁc loads between the outer wires of the rope and the groove. Premature wire rope failure due to the breaking of individual wires in the outer strands can occur. This does not happen with sheaves made of cast nylon.
The elasticity of our sheaves results in a larger contact area between wire rope and sheave groove. The speciﬁc loading is greatly reduced and the wire rope is under less stress. Linatex sheaves provide a cushion in the groove contact area. The load bearing contact area on our sheave is 10 times larger than on a steel sheave.
Wear resistance, reduced speciﬁc loading and elasticity make our sheaves extend the life of the wire rope by 2500 mm sheave for the offshore industry.
We can help you, with the engineering part – and the needed certificates for your area.
Our finite element method, FEM- will provide you with the needed safety.