Quick Answer: Polyurethane skirting is routinely cut to order, and on most transfer points it should be. The strip is cut to belt width, bevelled to the trough angle, squared to the skirtboard run and drilled to the clamp bar pitch. Off-the-shelf strip only works when a standard width and a 35-degree trough happen to match the conveyor already installed.

Key Takeaways

· Spillage at a transfer point is almost always a gap problem, not a belt problem.

· A straight-cut strip on a troughed belt touches the centre idler only, leaving two wedge-shaped gaps on the wings.

· Bevel accuracy matters more than material grade: two degrees out across 1200 mm lifts one wing clear.

· Belt line speed and splice type are the two measurements most often left off an enquiry, and both change the part.

· Aim for contact at the centre and both wing transitions, 2 mm to 3 mm elsewhere, set with the belt running.

· Leave 10 mm to 15 mm of take-up so the strip can be dropped as the bottom edge wears.

Summary Table

Definition: What Counts as Custom-Cut Skirting

Custom-cut skirting is a sealing strip manufactured to the measured geometry of one transfer point rather than to a nominal stock width. Three levels exist and they are not interchangeable.

Cut to length and width solves length and nothing else: strip is cut to the skirtboard run and exposed height, then squared.

Bevel cut to trough angle is where the value sits. A 35-degree belt does not present a flat surface to the skirtboard, so the bottom edge has to be cut with a matching bevel to follow the belt across its full width. This is why **Conveyor Belt Skirting** is specified by hardness and cut tolerance together rather than by material name.

Fabricated assemblies are used where the chute plan converges or diverges. Pieces are mitred and joined by vulcanised splicing or mechanical fastening to form a continuous seal.

Skirting is one component in a containment chain, so it helps to see where it sits in the wider **Conveyor** system before specifying.

Polyurethane skirting profiles, installed skirt line and coiled strip ready for cutting

Polyurethane skirting in three forms: extruded profiles, an installed skirt line under a clamp bar, and coiled strip ready for cutting.

Working Principle: Why the Cut Governs the Seal

The seal is created by proximity, not pressure. Polyurethane is stiff enough to hold a machined edge and flexible enough to deflect under a loaded belt. When the skirt sits within a couple of millimetres of the belt, the belt sags between idlers under load and closes that clearance at the points that matter.

Press the skirt hard against the belt and the seal is excellent on day one, at the cost of friction, heat and cover wear. Leave a visible gap and the belt runs free, at the cost of spillage. Any bevel error is amplified, because the seal is only as good as its worst point.

The gap must therefore be set with the belt running, ideally loaded, since a static belt sits higher than a running one.

Benefits of Cutting to Dimension

Spillage control at the source. Material inside the skirt line never becomes a cleanup task, a dust source or a housekeeping cost. This is the economic argument, and it usually pays back faster than the part.

Longer belt life. A well-fitted skirt reduces the material dragged under the edge, which is the main cause of cover gouging. A belt costs far more than the skirting that protects it.

Predictable wear allowance. Enough exposed height below the clamp bar converts a replacement into a 10 mm to 15 mm adjustment.

Applications

· Coal handling at bunker discharge and crusher feed, where dust suppression depends on a closed skirt line.

· Iron ore and copper ore transfer houses, where abrasive fines cut through straight-cut strip at the ends.

· Aggregates plants, particularly where a diverter or tapering chute changes the required width along the run.

· Tailings-adjacent conveyors, where wet sticky material bridges any gap it finds.

On **Belt Conveyors** being upgraded rather than repaired, review the loading zone as a whole. Where impact energy is high, an **Impact Bed** protects the belt and reduces the deflection the skirt has to absorb.

Material Comparison: Polyurethane, Rubber and Composite

Polyurethane is harder and more dimensionally stable, so it holds a bevel and does not creep under the clamp bar. Rubber compresses more readily and tolerates a rougher cut and a less accurate belt. The decision usually follows the condition of the belt rather than the material being carried.

Application Comparison: Which Cut for Which Duty