CORRECT SPOOLING OF STEEL WIRE ROPE ON DRUM It is imperative to correctly spool wire rope onto a drum. Improper spooling induces torque within the rope, which in turn reduces the life of the rope. In any multi-layer spooling application it is important that when the rope is first installed on the drum, it is done so under tension to avoid any slack on inner layers that can be crushed or nicked against the groove walls by outer layers. In general, the tighter the line, the better the spooling, but the rope should be tensioned with at least 2% of the breaking load or 10% of the working load. However, provision must also be made for the safety coefficient and the design of the cable. All subsequent spooling should also take place with the line under tension. Please contact your local Bunzl Safety branch for further advice.
STEEL WIRE ROPE CUTTING PROCEDURE
Hand cutters for cutting ropes up to 8mm in diameter are sufficient. Mechanical or hydraulic cutters will be required for wire ropes with larger diameters. Careless cutting can result in the balance of tension in the rope being destroyed. In every case, each side of the cut must be correctly seized to prevent strand disturbance. Annealed wire must always be used for non-galvanised rope. For galvanised rope use soft, zinc coated wire.
The rope and this wire end are now wrapped, moving away from the location of the intended cut. A
A
The rope is tightly wrapped for a distance of approximately three rope diameters. B
B
Both ends of the seizing wire are then pulled tight and twisted together for a length of one rope diameter. The twisted connection is then hammered into a strand valley. C
C
After preparing the other side of the cut accordingly, the rope can now be cut D
D
6 | BUNZL SAFETY & LIFTING | SAFETY PRODUCTS CATALOGUE VOL2 4
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