of hoist drums used for spooling wire rope are as follows:

1. Grooved drum. When grooved drums are used, the grooves generally give sufficient control to wind the wire rope properly, whether it is right or left lay rope.

2. Smooth-faced drum. Smooth-faced drums are used where the only other influence on the wire rope is winding on the first layer is the fleet angle. The slight rotational tendency of the rope can be used as an advantage in keeping the winding tight and uniform.

NOTE

Using the wrong type of wire rope lay causes the rotational tendency of the rope to be a disadvantage, because it results in loose and nonuniform winding of the rope on the hoist drum.

Figure 6-46 shows drum-winding diagrams for selection of the proper lay of rope. Standing behind the hoist drum and looking towards an oncoming overwind rope, the rotating tendency of right lay rope is toward the left; whereas the rotating tendency of a left lay rope is to the right.

Refer to figure 6-46. With overwind reeving and a right lay rope on a smooth-faced drum, the wire rope bitter end attachment to the drum flange should be at the left flange. With underwind reeving and a right lay rope, the wire rope bitter end should be at the right flange.

When wire rope is run off one reel onto another or onto a winch or drum, it should be run from TOP TO TOP or from BOTTOM TO BOTTOM, as shown in figure 6-47.

Figure 6-47. - Transferring wire rope from reel to drum.

1

FOR OVERWIND ON DRUM

THE PALM IS DOWN, FACING THE DRUM.

THE INDEX FINGER POINTS AT ON-WINDING ROPE.

THE INDEX FINGER MUST BE CLOSEST TO THE LEFT-SIDE FLANGE.

THE WIND OF THE ROPE MUST BE FROM LEFT TO RIGHT ALONG THE DRUM.

2

FOR OVERWIND ON DRUM

THE PALM IS UP, FACING THE DRUM.

THE INDEX FINGER POINTS AT UN-WINDING ROPE.

THE INDEX FINGER MUST BE CLOSEST TO THE RIGHT-SIDE FLANGE.

THE WIND OF THE ROPE MUST BE FROM RIGHT TO LEFT ALONG THE DRUM.

1

FOR OVERWIND ON DRUM

THE PALM IS UP, FACING THE DRUM.

THE INDEX FINGER POINTS AT UN-WINDING ROPE.

THE INDEX FINGER MUST BE CLOSEST TO THE RIGHT-SIDE FLANGE.

THE WIND OF THE ROPE MUST BE FROM RlGHT TO LEFT ALONG THE DRUM.

2

FOR OVERWIND ON DRUM

THE PALM IS DOWN, FACING THE DRUM.

THE INDEX FINGER POINTS AT ON-WINDING ROPE

THE INDEX FINGER MUST BE CLOSEST TO THE LEFT-SIDE FLANGE.

THE WIND OF THE ROPE MUST BE FROM LEFT TO RIGHT ALONG THE DRUM.

IF A SMOOTH-FACE DRUM HAS BEEN CUT OR SCORED BE AN OLD ROPE, ME METHODS SHOWN MAY NOT APPLY.

Figure 6-46.& - Different lays of wire rope winding on hoisting drums.