Trellex Griplag rubber pulley lagging

for belt conveyors

Trellex® Griplag from Metso is a quick replaceable lagging system that has been designed to service a wide range of applications. It is fastened with self-tapping M10 screws directly onto the pulley shell, so it´s easy to install without removing belt or pulley.

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About Trellex® Griplag rubber lagging


Trellex Griplag rubber pulley lagging is used in applications that require an easy installation and operation. Benefits include the application and removal of the lagging without removing the drum or belt from the conveyor system. Not suitable for reversible belts. Fastened to the pulley on just one side (no glue needed), the pulley lagging is designed to flap freely up and down as the pulley rotates, easily shaking off any dirt from the surface.


The design of the fastening steel rail molded in rubber in the Trellex Griplag lagging combined with the material´s surface pattern permit the rubber pulley lagging to stretch. This gives a superior ability to handle internal wear. The pattern of conical rubber knobs also naturally eliminates water from the surface of the lagging as the pulley rotates.


Trellex Griplag rubber lagging 3D

Installation: Light to medium duty applications


Not suitable on reversible belts

Trellex Griplag rubber lagging 3D

Benefits and features

  • Improved belt tracking

  • Reduces slippage between belt & pulley

  • Suitable for light & medium applications

  • Suits any pulley size

  • Easy to install – without removing belt or pulley

Technical description

Material: Wear Rubber Trellex T60 ShoreA
Wear side: Conical rubber knobs
Installation: Bolted to pulley surface

Trellex Griplag belt direction web.jpg

Image: belt direction

Lagging specifications

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 lagging: 3 years.
(Stored covered out of sunlight UV and away from ozone generating equipment)

Selection guide

1. You need to know the pulley diameter & belt speed
2. Find the point in the chart where the belt speed curve crosses the line for the pulley diameter.
3. If the point is above the ”BLACK LINE” -> Griplag Mini or Griplag Mini Giant must be used (150mm)
4. If the point is below the ”BLACK LINE” -> Griplag Standard or Griplag Giant must be used (300mm)


Pulley lagging selection guide chart.jpg




Calculate your need:

There are two ways of applying Griplag:

The butt seam method which is the most economic option. Pads are cut to fit the pulley face width and the remaining ends of each cut pad are used butted together. Pieces shorter than 200 mm should be discarded.

The full width method when no butt seams are desired. Each pad row is provided with full face width pads that have no butt seams. 

Example pulley diameter 600 mm & face width 1000 mm.
Butt seam method:
1. Number of rows =
pulley diameter x 3,14/300
(300 = 135 mm pad width + 25 mm allowance for retainer.)
x = (600 x 3,14)/300
= 6,28

2. Number of rows =
pulley diameter x 3,14/150
(150 = 135 mm pad width + 25 mm allowance for retainer.)
x = (600 x 3,14)/150
= 12,56
Round down to closest whole number -> 6 and 12.
D = min/max spaces between lagging elements 6-20mm (0.2”-0.8”)

Trellex Griplag consumption calculation web.jpg
Check spaces between lagging elements
D=(300x0,28)/6 = 14 mm
D = (150x0,56)/12 = 7 mm


2. Multiply the number of rows of pads by the pulley face width, divide with 1200 (full length pad in mm)
(6x1000)/1200 = 5
Round up to closest whole number -> 5 pcs (300 mm) needed
(12x1000)/1200 = 10
10 pcs (150 mm) full length pads needed.


Full width method (only applicable up to face width 1200mm)
1. Same as 1. above
2. Calculate how many full widht sections you can get from a standard size pad.
Round down to closest full number -> 1
3. Divide number of rows with how many full widths you can get out of one pad.
5/1=5 full length pads required 10/1=10 full length pads required

Hole centers in the drum, CC = 150 mm (5.9"):


Hole diameter 9.2 mm (0.36") for M10 self tapping screws:


Recommended tightening torque 30 Nm (22 lb/ft):


Never install a piece that is shorter than 200 mm (8") and never use fewer than two screws:



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