PROK Pulley Lagging

We treat Pulley Lagging the same as every other aspect of Pulley Design.  We believe the best solution comes from understanding the operating conditions and then selecting the correct lagging technology for the conditions.

There is no one perfect lagging solution for all conditions.  Our engineering skills and experience as an OEM and conveyor expert are critical to selecting the correct lagging for specific conditions.  Reliable pulley lagging that lasts and does not de-bond is fundamental to conveyor reliability and maximising tons conveyed.

PROK’s new and rebuild facilities located in key mining regions apply many high-performance lagging types including hot vulcanised lagging systems, proven to increase pulley performance and reduce operating costs.

Rubber Pulley Lagging

PROK Abrasive Resistant Rubber Lagging is the most cost-effective lagging solution in most applications.

Abrasive Resistance Rubber Lagging is available in Plain Rubber, Standard Diamond Groove as well as Customer and application specific Groove Profiles & Patterns.

  • Good Abrasion Resistance
  • Good Dry Drive Traction
  • Good Wet Drive Traction (When Grooved)
  • Good Belt Cushioning and Impact Protection
  • Good Self-Cleaning Properties
  • Very Good Bond Strength and Durability
  • Low Cost Lagging System
  • FRAS option available

Extreme lagging is available for High Tension Belt Pulleys that suffer from significant abrasive wear.

PROK Rubber Lagging is Hot Vulcanised to the Pulley Shell, giving superior bond strength and a fully sealed interface between the lagging panels and the pulley shell. PROK does not recommend the use of Cold Bonded Pulley Lagging systems.

Polyurethane Lagging

Polyurethane is a more costly option than Rubber, however, it offers improved resistance to abrasive wear over the standard Abrasive Resistant Rubber Lagging. Which means it can be more cost effective over time, as it will last longer.

Here’s some of the benefits of using Polyurethane Pulley Lagging options:

  • Very Good Abrasion Resistance
  • Good Dry Drive Traction
  • Good Wet Drive Traction (When Grooved)
  • Moderate Belt Cushioning and Impact Protection
  • Very Good Self-Cleaning Properties
  • Good Bond Strength and Durability
  • Moderate to High Cost Lagging System
  • FRAS option available

Polyurethane lagging systems are available in Plain and Standard Diamond Groove, as well as Customer and Application Specific Groove Profiles & Patterns.

Hot Vulcanised Polyurethane

PROK Hot Vulcanised Polyurethane Lagging is a hybrid system featuring Polyurethane Bars cast into a Rubber backing panel.

This system offers a lower cost alternative to normal Hot Cast Polyurethane, as the lagging does not require the fabrication of expensive moulds and material wastage from the casting process.

It also offers improved Belt Cushioning compared to Cast Polyurethane.

Ceramic Lagging

Ceramic lagging has two key advantages over other lagging systems – the ceramic tiles are extremely abrasion resistant and for drive pulleys “dimpled” ceramic lagging can provide significant improvements in traction over alternatives such as Rubber and Polyurethane.

Ceramic Lagging comes in two forms, Direct Bonded and Rubber Backed. Each of these offers differing properties.

PROK only uses Ceramic Lagging that features high-grade Alumina Oxide tiles, providing the maximum wear life from pulley lagging.

The Alumina Oxide Tiles are available in Plain/Smooth for Non-Drive Pulleys and Dimpled for Drive Pulley applications.

Direct Bond Ceramic Lagging

Direct Bond Ceramic Lagging features tiles directly bonded to the pulley surface, and then grouted using a specifically developed epoxy adhesive.

Some of the advantages and disadvantages of Direct Bond Ceramic Lagging are listed below:

  • Exceptional Abrasion Resistance
  • Exceptional Dry Drive Traction (Dimpled type)
  • Exceptional Wet Drive Traction (Dimpled type, when drainage grooves fitted)
  • No Belt Cushioning and Impact Protection
  • Very Poor Self-Cleaning Properties – Dimpled Tiles especially prone to build-up
  • Risk of Belt Slip on Drive Pulleys causing High Belt Wear or Damage
  • Exceptional Bond Strength and Durability
  • High Cost Lagging System

Tiles are available in a range of sizes and shapes, that can be fitted providing full coverage of the Pulley Face or arranged to provide drainage channels.

Rubber Backed Ceramic Lagging

Rubber Backed Ceramic Lagging is designed to address some of the limitations of Direct Bond Ceramic Lagging and the traditional Cold Bonded Ceramic Lagging systems.

The same high-quality tiles are embedded into a rubber backing material, that is then Hot Vulcanised to the Pulley Shell, providing a degree of cushioning from impact and allowing the tiles to compensate for belt contraction on Drive Pulleys.

Rubber Backed Ceramic Lagging

PROK recommends Rubber Backed Ceramic Lagging for its exceptional tile to rubber and rubber to pulley shell bonding systems. This lagging is also available with Plain/Smooth or Dimpled tiles.

  • Exceptional Abrasion Resistance
  • Exceptional Dry Drive Traction (Dimpled type)
  • Exceptional Wet Drive Traction (Dimpled type)
  • Some Belt Cushioning and Impact Protection
  • Poor Self-Cleaning Properties – Dimpled Tiles especially prone to build-up
  • Low Risk of Belt Slip on Drive Pulleys causing High Belt Wear or Damage
  • Very Good Bond Strength and Durability
  • High Cost Lagging System

Hot Vulcanised Ceramic Lagging (HVCL)

PROK has developed a HVCL product that solves the problems associated with cold bonded rubber backed ceramic lagging which included poor Shell Bond Strength and Tile Loss.

This product has been specifically developed and tested to greatly improve the durability and strength of the bonding of the Lagging to the Pulley Shell and the Ceramic Tiles to Rubber Backing Panel.

The result is a product that achieves an exceptional balance between durability, drive traction, abrasion resistance and cushioning. The rubber backing layer is critical in certain drive pulley applications to control the risk of belt slip and belt cover damage.

PROK has the tools available to assess applications to ensure that the right lagging thickness is specified to protect your belt and eliminate the risk of drive slip.

This lagging is available with either Dimpled/Pimpled or Plain tiles.

PROK Pulley Lagging

PROK have many options available for Pulley Lagging and assess each situation individually to your operating conditions and pulley lagging requirements.

Contact PROK today to regarding Pulley Lagging Systems and services.