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Flexarmor : Mining trucks - Box liners

Designed to meet the specific needs of each application, Flexarmor mining truck box liners offer many advantages over traditional steel liners.

  •  Due to the anti-wear properties of rubber, they last five to six times longer than a steel liner. This extended life cycle of a Flexarmor liner eliminates the need for multiple steel liner replacement cycles and the associated costs, thereby increasing truck box availability.
  • The use of a Flexarmor rubber liner in a truck box eliminates the vast majority of structural damage, protects all of the truck’s mechanical components and minimizes maintenance costs. Because rubber has the ability to deform under impact, the energy impact at loading time is absorbed by the liner, protecting the bottom of the box as well as the sidewalls. Structural repairs to the box due to floor and wall sagging are therefore eliminated.
  • The energy absorbing properties of a Flexarmor liner also have the added benefit of reducing the noise level by several decibels when the first bucket is loaded, helping to meet environmental and workplace safety standards.

Benefits :

  • Lowers the operating cost per ton
  • Increases truck box availability rate
  • Eliminates structural damage and minimizes box repair costs
  • Provides a longer service life being 5 to 6 times more durable than a steel liner
  • Significantly reduces the environmental noise level at the first bucket loading
  • Greatly reduces the shock and vibration levels felt by the truck operator
  • Increases the life cycle of a box and reduces the number of spare boxes required per fleet
  • Absorbs impact energy and helps protect all mechanical components of the truck.

Custom Made:

Flexarmor rubber box liners are supplied in molded packages customized for each truck and delivered ready to be installed in open pit or underground mining trucks. The thickness of rubber required for each surface to be covered is based on rock density, fragmentation size, drop height and type of loading equipment. Thus, for the same box, the rubber thickness can be optimized according to the impacts or the degree of wear that each surface must undergo.

The assemblies can cover the floor and the three walls for heavy-duty mining production applications operating with very large loading equipment or can be made up of only one floor for less demanding applications in the aggregate industry where a lower noise level during loading is required. Liners can cover the entire floor area or just the front loading area for use with a rock box in the unloading area.


Each Flexarmor liner plate has molded threaded inserts that are used to install handling lugs for easy manipulation during installation. The liner plates are bolted to the box structure using Nelson type threaded studs that are welded directly to the box structure. Once the plates are placed on the structure, the threaded studs are welded to the bottom of the installation holes, then a conical washer is inserted before screwing on the nut.

Once the bolting is complete, rubber plugs with non-return fins are inserted into the bolt holes to permanently seal them. Once the rubber plates are installed, HT angled steel plates are then welded around the liner as a finish. These steel plates are designed to prevent the infiltration of fine ore behind the rubber lining and provide mechanical perimeter support. For the floors, if the liner is not used with a rock box for mechanical support, a support angle iron is installed on the unloading lip of the box.