Magnefast Case Studies

Lagging Types Overview

Lagging Types Overview

LAGGING TYPEIMAGEDESCRIPTIONHOT VULCANISINGCOLD BONDINGNATFRASMORE INFORMATION
Rubber LaggingRubber LaggingFlexible and high abrasion resistant lagging to provide protection to drive and non drive pulleys and grip for drive pulleys. Designed for medium belt tension wet and dry applications.YesYesYesYesVIEW
Diamond 15% Rubber Lagging3-Diamond-Ceramic-Lagging15% ceramic coverage for extra grip compared to rubber lagging.YesYesYesYesVIEW
Extreme Ceramic LaggingExtreme Ceramic LaggingIncreased flexibility and toughness for high tension applications. Heavy duty tiles, higher tile adhesion strength, increased dimple size. Hot vulcanised application. New or refurbished pulleys.Yes-YesYesVIEW
Wear Indicator LaggingWear Indicator LaggingVisual indication of lagging wear to help identify requirement for planned lagging replacement without having to stop conveyor. Cold bonded or hot vulcanised.YesYesYesYesVIEW
Medium Single Row Ceramic 38% Lagging2-Ceramic-LaggingGrip increase compared to rubber lagging for drive pulleys (dimple tiles). Increased resistance to wear and service life (smooth tiles). 38% ceramic coverage.YesYesYesYesVIEW
Ceramic 20% Lagging4-Checker-Pattern-Ceramic-Lagging20% ceramic coverage. Dimple tiles for drive pulleys, smooth tiles for non-drives.YesYesYesYesVIEW
Full 80% Ceramic Lagging6-80_-Ceramic-LaggingMaximum ceramic coverage to minimise risk of physical damage on rubber surface area.YesYesYesYesVIEW
Oil Resistant Rubber and Ceramic LaggingComparison-Table-Oil-Resistant-600x300Longer service life when handling oily materials such as bitumen, tar sand, and various grains.YesYesYesVIEW
Extreme Rubber Lagging9-High-Tension-Bend-LaggingLarge non drive pulleys on high power (6MW) belt conveyors (3,000kN belt tensions) that are in contact with the dirty side of the belt. Pulleys with high levels of carry back, pulleys in locations that are difficult to access, when downtime needs to be eliminated. Extreme wear resistance and kind to the belt. Hot vulcanised application. New or refurbished pulleys.Yes-Yes-VIEW
Ceramic Slide LaggingCeramic Slide LaggingQuick replaceable lagging that can be applied on site. Easy to replace without removing pulley from conveyor. For drive pulleys with requirement for extra grip (Dimple tiles). Increased resistance to wear and service life (smooth tiles). Recommended for mining, quarry, grain and concrete industries. New pulleys or onsite repairs.--YesYesVIEW
Polyurethane Lagging13-Polyurethane-LaggingNon drive applications with requirement for longer service life than rubber lagging and kind to the belt (does not transfer wear to belt cover). Resists build up.YesYesYes-VIEW
Rubber Slide LaggingRubber Slide LaggingQuick replaceable lagging that can be applied on site. Easy to replace without removing pulley from conveyor. Easy installation, quick replacement for increase productivity. Recommended for mining, quarry, grain and concrete industries. New pulleys or onsite repairs.--YesYesVIEW
Rubber Crowned Lagging12-Crowned-LaggingImproved belt tracking in low to medium tension applications.YesYesYesYesVIEW
Direct Bond Ceramic Lagging14-Direct-BondMaintenance free wear resistance surface. Increased traction with high strength bonding system for drive pulleys and smooth low friction surface for non drive pulleys. New or refurbished pulleys.----VIEW

Additional information

FRAS:

Applications where there is a risk of fire and/or explosion as a safety precaution. Underground coal mines, power stations, grain handling and sugar terminals. Identified with red coloured logos.

Bonding systems:

  • Cold bonding: Emergency repair on site or when there’s no access to an autoclave.
  • Hot vulcanised: Applications when there’s a requirement for 0 risk of lagging debonding from pulley shell. New and refurbished pulleys
LAGGING DESIGNCERAMIC COVERAGE %SELECTION CRITERIA
Diamond Ceramic Lagging15To replace rubber lagging on drives where slippage is a problem and the end user wants to avoid the expense of a ceramic lagging with higher ceramic coverage.
Checker Pattern Ceramic Lagging20A lower cost alternative to Medium Ceramic lagging – usually used on non drive pulleys for increased wear and improved belt tracking where the end user is concerned about cost.
Medium Ceramic Lagging39Medium Ceramic Lagging is the standard design most commonly used on drive and non drive pulleys.
Full Ceramic Lagging80

Full Ceramic Lagging is used to reduce the shear forces between the lagging tiles and the bottom belt cover. This is done to protect both the bottom belt cover and the lagging from damage.

Full ceramic lagging is recommended to be used on drive pulleys in the following conditions:

  • where T1/T2 ratios >1.75 exist
  • for steel cord belts.

Extreme Full Ceramic Lagging (tile thickness increased from 6 to 12mm)80Extreme Full ceramic is used in applications where Full Ceramic Lagging has been used and carry back is present and is damaging the tiles. Also used on large high tension ( > 1,000 kN/m) drive pulleys where service life > 5 years is required
Direct Bond Ceramic Lagging (DBCL)100High performance ceramic lagging for drive and non drive pulleys. Always carry out Lagging Analyst analysis for drive pulleys as DBCL is rigid and is more likely to cause bottom belt cover wear. Not recommended for use on drive pulleys with high tension fabric belts due to risk of bottom belt cover wear. For non drive pulleys do not use with applications handling wet and/or sticky materials due to build up that can damage the belt and cause belt tracking problems.
Ceramic Slide Lagging39Slide lagging is used where lagging replacement on site is required and/or where access to the pulley for lagging replacement is restricted. The most common application for ceramic Slide Lagging is drive pulleys on bucket elevators.

Important notes:

  1. Hot vulcanized bonding is preferred in all applications where service life is required to exceed that of the bearings and locking elements.
  2. For drive pulleys Lagging Analyst analysis is recommended to check for theoretical slippage between the lagging and the bottom belt cover. This minimises the chance of bottom belt cover wear.
  3. Standard tiles 6mm thick dimpled tiles for drive pulleys and 6mm thick plain tiles for non drive pulleys. Extreme tiles 12mm thick for applications where Standard tiles are being damaged.
  4. Ceramic lagging is not the solution for all wear life issues and in some applications is not the best performing lagging. Contact Elastotec for assistance with specific lagging performance problems.
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