Why are the hoist drums or winches often grooved?

Asked by: Ali Blackwell

The benefit of the grooves is that they help the rope to wind smoothly and sit on the previous wrap rather than neatly alongside it. Untidy spooling is not merely a matter of aesthetics – the rope can get caught, crushed and otherwise damaged – and rope renewal is a costly business.

What is a winch drum?

A winch drum is a component within a winch system. Winches are devices that use a long cable wrapped around a cylindrical drum to haul heavy items. The drum is usually attached to a motor that can turn it in either direction, thereby either feeding cable out or retracting it inward.

What is the minimum depth of groove for a grooved winch drum?

Sheaves shall be grooved to a depth of not less than 1.5 times the diameter of the rope. The contour at the bottom of the grooves shall be circular over an angle of approximately 130 degrees.

What is the minimum amount of rope that shall be on a grooved drum and a smooth drum?

two wraps

No less than two wraps of rope shall remain on the drum at each anchorage of the hoist(ing) drum when the hook is in its extreme low position unless a lower-limit device is provided, in which case no less than one wrap shall remain.

What is a wire rope drum?

Wire rope drum is a part of crane hoisting mechanism which is for winding steel wire rope as a winch to carry out hoisting tasks. 2. Drum unit is constituted by the drum, gearwheel, hub, shaft, bearing, and bearing housing. 3. Drum unit is applied to the large tonnage hoisting machinery that needs high-performance.

What are winch drums made of?

fabricated steel

Most winch drums are made of fabricated steel and designed for a specific loading capacity.

What is the purpose of winches?

A winch is a piece of mechanical equipment used to move heavy items. Winches work by either pulling in or letting out rope or wire rope (also known as cable), or adjusting the tension of the rope.

Why are winches often grooved?

The benefit of the grooves is that they help the rope to wind smoothly and sit on the previous wrap rather than neatly alongside it. Untidy spooling is not merely a matter of aesthetics – the rope can get caught, crushed and otherwise damaged – and rope renewal is a costly business.

What is the maximum fleet angle allowed for a grooved drum?

2°

The angle between the center line through the lead sheave and the centerline of the rope leading to the drum is called the fleet angle. Experience has shown that the best wire rope service is obtained when the maximum fleet angle is not more than 1½° for smooth drums, and 2° for grooved drums.

What is fleet angle?

Fleet angle is the difference between the angle at which the cable is traveling and the centerline of the drum.

How does a wire rope winch work?

The drum is designed to release, retrieve and store the wire rope. During winching operation, the drum will rotate so as to wind the rope in and out. The resulting tension enables you to lift or pull a heavy load. Our winches come in a range of designs from electric powered winch to hydraulically driven winch.

How do you spool a winch?

And just make sure that it goes across row after row in a nice neat. Pattern. All right every once in a while you'll want to make sure to stop and take a break and let you when to cool.

What is drum in Crane?

Drums. Drums are used to pull in and store steel wire ropes. The rope can be spooled in single-layer or in multi-layer spooling. Single-layer drums can be ungrooved or have a helical groove. The pitch of the drum will typically be nominal rope diameter + 10 %.

What is the purpose of a hoist drum?

A hoisting drum is a cylindrical member which holds a wire rope for the purpose of lifting and lowering a load.

What is slack rope in crane?

Easy Control for crane operators



Slack Rope Prevention is designed for the smooth placement of load items and works to prevent damage to and stabilize the load for easy handling.