Trellex Cerlag ceramic pulley lagging

for belt conveyors

Trellex® Cerlag ceramic pulley lagging is especially suitable for drive pulleys subject to extreme wear to eliminate slippage in belt conveying. Ceramic lagging can be used when there’s a requirement for more grip than what rubber lagging provides and longer service life as a result of higher wear resistance than rubber.

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About Trellex® Cerlag ceramic pulley lagging


Trellex Cerlag ceramic pulley lagging can be applied to conveyor drive, tail, snub, bend or take-up pulleys when there’s a requirement for more grip than what rubber lagging provides or longer service life as a result of higher wear resistance than rubber.

Ceramic pulley lagging is used for pulleys operating under extreme conditions. It is suitable for wet, clay containing, muddy and abrasive materials. Also for belts under very high tension. Especially suitable for drive pulleys subject to extreme wear to eliminate slippage.

Trellex pulley lagging should be applied according to our application procedure using Trellex Steel Primer and Trellex Greenbond adhesive.


Cerlag ceramic lagging has vulcanized alumina tiles on rubber with rubber bonded to optimized area of the tile to ensure tile cushioning and better adhesion strength. Tiles provide high abrasion resistance. Rubber backing used is rubber compounds abrasion resistant and flexible to provide flexibility to the tile. Cerlag ceramic pulley lagging is made of a two different rubber layers extruded together. The top layer being the high abrasion resistant layer to which the tiles are vulcanized onto and the bottom layer being the adhesion CN bonding layer.

Our specially formulated neoprene-based CN bonding layer is engineered to achieve ultimate adhesion when bonded to steel pulley surfaces. Metso’s CN bonding layer has a buffed finishing to provide an increased surface contact area that increases adhesion. Cerlag ceramic lagging is 250 mm wide as standard (500 mm as MTO) to ensure easy handling and application. It can be supplied in thicknesses from 12 mm to 25 mm. Thicker rubber allows more deflection of the tiles under the belt. This property provides additional reserves with extreme belt tensions, especially in combination with fabric belts with high elongation or low cover thickness on the running side.

Ceramic lagging with dimple tiles issued on drive pulleys to increase grip and Ceramic lagging with smooth tiles is used on non-drive pulleys to increase wear resistance/service life.


Cerlag direct bonding ceramic pulley lagging 3D


Drive & Non-drive pulley

Cold bonding rubber/ceramic lagging

(Hot vulcanized available on request)

Fire resistant & Anti static FRAS (available on request)

Cerlag direct bonding ceramic pulley lagging 3D

Benefits and features

  • 96% Aluminum oxide tile material provide extreme wear resistance.

  • Rubber compound blended with CN polymers provide outstanding adhesion to ceramic tiles, rubber and metal.

  • Buffed CN bonding layer and buffed edges for optimum cold vulcanized adhesion to the pulley.

  • Low Sulphur rubber makes rubber hardness stable with age.

  • Tiles with raised dimples improved belt grip and tracking.

  • Can be hot vulcanized to the pulley to achieve best bonding to metal pulley shell.

  • Smooth tiles to protect non drive pulleys from damaging the belt cover.

  • Supplied in strip form 250 mm wide easy install.

  • Supplied in long rolls up to 50 m to reduce waste and be more cost effective and reduce stock requirement quantity as one roll fits all pulley widths.

  • Can be supplied in cut to size strips with rubber ends to suit customer preference.

  • Tile pattern in 100 mm segments can be used on all pulley widths.

  • Cutting sipes allow adjustment of strip width to suit pulley diameter.

Technical description

Material: Wear Rubber 65 ShoreA, Round ceramic tiles >95% Al2O3, Buffed Bonding Layer-CN
Standard installation: Cold bonding (Hot vulcanising available on request)
Fire resistant & Anti static, FRAS: Available on request
Width: Standard 250mm (500mm available on request)

Cold bonded adhesion: Metso Cerlag ceramic lagging should be applied according to the application procedure using Trellex Steel Primer P5 (P/N 2322060) and Trellex Greenbond adhesive (P/N 2322040).
These have been formulated to contain ingredients that chemically interlock with components in the bonding layer.

Wear indicators: Green color standard rubber & Orange color FRAS.

Hot vulcanising: Available on request. Hot vulcanising lagging is supplied with a 1,2mm thick uncured rubber layer applied to the back and sides.
Packed in plastic to protect and keep the uncured bonding layer fresh and free from contamination until it’s applied to the pulley.
Application by an approved applicator will guarantee a 100% rubber tear bond between the lagging and the pulley shell with typical adhesion values exceeding 20 N/mm.

Lagging specifications

Light/Medium/Heavy applications
Roll dimensions:
12, 15 & 20mm thickness in 250mm width (500mm width as MTO)
12mm in 10000mm, 20000mm & 58200mm roll length
15mm in 10000mm, 20000mm & 48500mm roll length
20mm in 10000mm, 20000mm & 38800mm roll length
Strip dimensions:
Thickness 15mm, width 250mm & length 1600mm
Available on request, thickness 12, 15, 20 & 25mm, width 250 & 500mm & length of request
Thickness variation (all strips/rolls) +/-0.5mm
Ceramic lagging with thickness > 15 mm only recommended for pulleys with diameters over 600mm.

Item codes
Storage recommendations

Storage room for lagging must be cool, dry and kept clean.
Protect the lagging from dust, water etc. with suitable coverings.
Avoid storage places near sources of ozone generating equipment.
UV light can damage the product – protect product against direct sunlight and strong artificial light.
Do NOT store outside.
Do NOT store together with fuels, lubricants, acids, disinfectants, solvents or other chemicals.
Allow 24 hours before use when lagging is removed from cold storage.
Shelf life for cold vulcanizing lagging: 3 years.
(Stored covered out of sunlight UV and away from ozone generating equipment)


Calculate your need:

The length of the lagging/drum

Pulley Ø = 500mm
Lagging thickness = 12mm
Pulley width = 1000mm
Extra length/strip = 100mm
Lagging width = 250mm
Pi (𝜋)= 3,14

The circumference of the lagging/drum

(500 + 12) X 3,14 = 1608mm

1608 = 6,4 strips -> 7 strips

7 X (1000 + 100) = 7700mm

The length of the lagging/drum = 7700mm


Ensure all the time that any air pockets are eliminated.

Always place the Cerlag edge to edge against one another.

When adapting the final piece to the remaining space, if this should prove to be extremely small the joint is to be filled with some kind of filling compound.


Never joint Cerlag with pieces that are <200 mm (8").


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