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Pulley Lagging Specifications

Essential lagging specifications are necessary to comprehend the factors involved in selecting premium pulley lagging.

These specifications are sought after while drafting tender documents to ensure premium quality lagging selection. These represent the fundamental lagging requirements or the baseline criteria that must be taken into account before finalising a purchase choice.
At the bottom of the page is the information as a download package for easy reference.
  • Lagging for both Drive and Non-Drive pulleys needs to be selected via an engineering analysis.
  • Lagging engineering analysis must provide justification that the lagging will prevent or minimise slip, and have sufficient fatigue resistance to provide the required service life.
  • *** Performance Critical specifications relate directly to the performance and life expectancy of the lagging. These should be included within every specification
Cold Bond Rubber Lagging
Rubber SpecificationsNATURAL/SBRFRASOIL RESISTANTEXTREME CERAMICNOTEPERFORMANCE CRITICAL
Tensile strength (MPa) ISO37 (min)> 20> 18> 17> 20
Elongation ISO37 (min)> 550%> 500%> 500%> 550%
Hardness (shore A) ISO86865+/-565+/-565+/-560+/-5
Abrasion resistance max vol. loss ISO 4649 method A (non-rotating)< 70mm3< 150mm3< 140mm3< 80mm3Abrasion resistance has a direct correlation to wear. The lower the number, the longer the wear service lifeYes
Heat ageing Maximum Change (70hrs @ 70C)Tensile strength +3%
Elongation -15%
Hardness +2 points
Tensile strength +3%
Elongation -6%
Hardness +3 points
Tensile strength +5%
Elongation -1%
Hardness +3 points
Tensile strength +2%
Elongation -20%
Hardness +7 points
Heat ageing determines the laggings ability to retain original physical properties
Oil resistanceNANAOil resistance as per table belowNAYes - in applications where oily materials are being conveyed
Continuous operating temperature range-40/+70°C-40/+70°C-40/+70°C-40/+70°C
FRAS (Fire Resistant and Anti Static) MDG3608 and MSHA CertificationNAPassed & Certificates providedNANAYes - in applications where FRAS products are a legislative requirement
Lagging Application MethodHot VulcanisedHot VulcanisedHot VulcanisedHot Vulcanised Only (No Cold Bond option)Mandatory requirement for maximum service life. HV eliminates laggigng debonding from pulley shell, edge lifting, and joint separation.Yes
Lagging Manufacturing processPress mouldedPress mouldedPress mouldedPress mouldedEliminates lagging internal delamination
Application Procedure and TestingLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyYes
Lagging Adhesion to Steel>20N/mm + 100% rubber tear>20N/mm + 100% rubber tear>20N/mm + 100% rubber tear>20N/mm + 100% rubber tearAdhesion test is mandatory for each pulley. Refer to Hot Vulcanised Lagging Test Procedure for the process to follow.Yes
Lagging Adhesion to Steel GuaranteeNo debonding from the pulley shell for the service life of the pulleyNo debonding from the pulley shell for the service life of the pulleyNo debonding from the pulley shell for the service life of the pulleyNo debonding from the pulley shell for the service life of the pulleyYes
OIL TYPEOIL RESISTANT
Volume Swell%
Corn Oil10-20
Cotton Seed Oil10-20
Linseed Oil5-10
Olive Oil5-10
Peanut Oil10-20
Pinene10-20
Pine Oil>100
Rapeseed Oil5-10
Soybean Oil5-10
Terpineol >100
Tung Oil 5-10
Terpentine>100
Vegetable Oil10-20
White Pine Oil>100
White Oil5-10
Wood Oil 5-10
Asphalt5-10
* Elastotec Oil Resistant lagging is not recommended for use with oils where volume swell exceeds 20%.
  • Lagging for both Drive and Non-Drive pulleys needs to be selected via an engineering analysis.
  • Lagging engineering analysis must provide justification that the lagging will prevent or minimise slip, and have sufficient fatigue resistance to provide the required service life.
  • *** Performance Critical specifications relate directly to the performance and life expectancy of the lagging. These should be included within every specification.
Hot Vulcanised Ceramic Lagging
Rubber SpecificationsNATURAL/SBRFRASOIL RESISTANTEXTREME CERAMICNOTEPERFORMANCE CRITICAL
Tensile strength (MPa) ISO37 (min)> 20> 18> 17> 20
Elongation ISO37 (min)> 550%> 500%> 500%> 550%
Hardness (shore A) ISO86865+/-565+/-565+/-560+/-5
Abrasion resistance max vol. loss ISO 4649 method A (non-rotating)< 70mm3< 150mm3< 140mm3< 80mm3Abrasion resistance has a direct correlation to wear. The lower the number, the longer the wear service lifeYes
Oil resistanceNANAOil resistance as per table belowNAYes - in applications where oily materials are being conveyed
Continuous operating temperature range-40/+70°C-40/+70°C-40/+70°C-40/+70°C
FRAS (Fire Resistant and Anti Static) MDG3608 and MSHA CertificationNAPassed & Certificates providedNANAYes - in applications where FRAS products are a legislative requirement
Lagging Application MethodHot VulcanisedHot VulcanisedHot VulcanisedHot Vulcanised Only (No Cold Bond option)Mandatory requirement for maximum service life. HV eliminates laggigng debonding from pulley shell, edge lifting, and joint separation.Yes
Lagging Manufacturing processPress mouldedPress mouldedPress mouldedPress mouldedEliminates lagging internal delamination
Application Procedure and TestingLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyYes
Lagging Adhesion to Steel>20N/mm + 100% rubber tear>20N/mm + 100% rubber tear>20N/mm + 100% rubber tear>20N/mm + 100% rubber tearAdhesion test is mandatory for each pulley. Refer to Hot Vulcanised Lagging Test Procedure for the process to follow.Yes
Lagging Adhesion to Steel GuaranteeNo debonding from the pulley shell for the service life of the pulleyNo debonding from the pulley shell for the service life of the pulleyNo debonding from the pulley shell for the service life of the pulleyNo debonding from the pulley shell for the service life of the pulleyYes
Ceramic SpecificationsNATURAL/SBRFRASOIL RESISTANTEXTREME CERAMICPERFORMANCE CRITICAL
Aluminium oxide>95%>95%>95%>95%Yes
Specific gravity g/cm3>3.7>3.7>3.7>3.7
Vickers hardness HV (10)>1000>1000>1000>1000Yes
Fracture Toughness (Mpa m1/2)>3.5>3.5>3.5>3.5Yes
Tile Cracking Force (min)>2000N>2000N>2000N>10,000N
Tile Body Thickness Exc dimple (min)4mm4mm4mm8mm
Tile surfaces bonded to rubber5 sides of each tile5 sides of each tile5 sides of each tile5 sides of each tileYes
Force to remove ceramic tile from rubber (min)>200kg per tile and 100% rubber tear failure after a minimum of 12 months outdoor environmental exposure>200kg per tile and 100% rubber tear failure after a minimum of 12 months outdoor exposure>200kg per tile and 100% rubber tear failure>400kg per tile and 100% rubber tear failureYes
Ceramic Tile Adhesion GuaranteeNo debonding from rubber for the service life of the laggingNo debonding from rubber for the service life of the laggingNo debonding from rubber for the service life of the laggingNo debonding from rubber for the service life of the laggingYes
OIL TYPEOIL RESISTANT
Volume Swell%
Corn Oil 10-20
Cotton Seed Oil 10-20
Linseed Oil 5-10
Olive Oil 5-10
Peanut Oil 10-20
Pinene 10-20
Pine Oil >100
Rapeseed Oil 5-10
Soybean Oil 5-10
Terpineol >100
Tung Oil 5-10
Terpentine >100
Vegetable Oil 10-20
White Pine Oil>100
White Oil 5-10
Wood Oil5-10
Asphalt 5-10

* Elastotec Oil Resistant lagging is not recommended for use with oils where volume swell exceeds 20%.

  • Lagging for both Drive and Non-Drive pulleys needs to be selected via an engineering analysis.
  • Lagging engineering analysis must provide justification that the lagging will prevent or minimise slip, and have sufficient fatigue resistance to provide the required service life.
  • Due to the low coefficient of friction, polyurethane lagging should only be used on Non-Drive pulleys.
  • *** Performance Critical specifications relate directly to the performance and life expectancy of the lagging. These should be included within every specification
Hot Vulcanised Polyurethane Lagging
Polyurethane SpecificationsNATURAL/SBRNOTESPERFORMANCE CRITICAL
Hardness (shore A) ASTM D224085 +/-5
Tensile Strength DIN53504 > 40 Mpa
Elongation at break ASTM D412 > 500%
Abrasion resistance max vol. loss DIN 53516 method A (non-rotating)< 30 mm3Abrasion resistance has a direct correlation to wear. The lower the number, the longer the wear service lifeYes
Continuous operating temperature range -40/+70°C
Recommended Lagging Application MethodHot VulcanisedMandatory requirement for maximum service life. HV eliminates laggigng debonding from pulley shell, edge lifting, and joint separation.Yes
Lagging Manufacturing processPress mouldedEliminates lagging internal delamination
Application Procedure and TestingQA Checklist and adhesion test for each pulleyYes
Lagging Adhesion to Steel>20N/mm + 100% rubber tearAdhesion test is mandatory for each pulley. Refer to Hot Vulcanised Lagging Test Procedure for the process to follow.Yes
Lagging Adhesion to Steel GuaranteeNo debonding from the pulley shell for the service life of the pulleyYes
  • Lagging for both Drive and Non-Drive pulleys needs to be selected via an engineering analysis.
  • Lagging engineering analysis must provide justification that the lagging will prevent or minimise slip, and have sufficient fatigue resistance to provide the required service life.
  • *** Performance Critical specifications relate directly to the performance and life expectancy of the lagging. These should be included within every specification.
Cold Bond Rubber Lagging
Rubber SpecificationsNATURAL/SBRFRASOIL RESISTANTNOTEPERFORMANCE CRITICAL
Tensile strength (MPa) ISO37 (min)> 20> 18> 17
Elongation ISO37 (min)> 550%> 500%> 500%
Hardness (shore A) ISO86865+/-565+/-565+/-5
Abrasion resistance max vol. loss ISO 4649 method A (non-rotating)< 70mm3< 150mm3< 140mm3Abrasion resistance has a direct correlation to wear. The lower the number, the longer the wear service lifeYes
Heat ageing Maximum Change (70hrs @ 70C)Tensile strength +3%
Elongation -15%
Hardness +2 points
Tensile strength +3%
Elongation -6%
Hardness +3 points
Tensile strength +5%
Elongation -1%
Hardness +3 points
Heat ageing determines the laggings ability to retain original physical properties
Oil ResistanceNANAOil resistance as per table belowYes - in applications where oily materials are being conveyed
Continuous operating temperature range-40/+70°C-40/+70°C-40/+70°C
Lagging Application MethodCold BondCold BondCold BondHot Vulcanised lagging provides much higher levels of adhesion and sealing compared to Cold Bond. Cold Bond application should only be used when Hot Vulcanising is not an option.Yes
Lagging Manufacturing processPress mouldedPress mouldedPress mouldedEliminates lagging internal delamination
Application Procedure and TestingLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyYes
Lagging Adhesion to Steel>12N/mm>12N/mm>12N/mmAdhesion test is mandatory for each pulley. Refer to Cold Bond Lagging Test Procedure for the process to follow.Yes
OIL TYPEOIL RESISTANT
Volume Swell%
Corn Oil10-20
Cotton Seed Oil10-20
Linseed Oil5-10
Olive Oil5-10
Peanut Oil10-20
Pinene10-20
Pine Oil>100
Rapeseed Oil5-10
Soybean Oil5-10
Terpineol>100
Tung Oil 5-10
Terpentine>100
Vegetable Oil10-20
White Pine Oil>100
White Oil5-10
Wood Oil5-10
Asphalt5-10

* Elastotec Oil Resistant lagging is not recommended for use with oils where volume swell exceeds 20%.

  • Lagging for both Drive and Non-Drive pulleys needs to be selected via an engineering analysis.
  • Lagging engineering analysis must provide justification that the lagging will prevent or minimise slip, and have sufficient fatigue resistance to provide the required service life.
  • *** Performance Critical specifications relate directly to the performance and life expectancy of the lagging. These should be included within every specification
Hot Vulcanised Ceramic Lagging
Rubber SpecificationsNATURAL/SBRFRASOIL RESISTANTNOTEPERFORMANCE CRITICAL
Tensile strength (MPa) ISO37 (min)> 20> 18> 17
Elongation ISO37 (min)> 550%> 500%> 500%
Hardness (shore A) ISO86865+/-565+/-565+/-5
Abrasion resistance max vol. loss ISO 4649 method A (non-rotating)< 70mm3< 150mm3< 140mm3Abrasion resistance has a direct correlation to wear. The lower the number, the longer the wear service lifeYes
Heat ageing Maximum Change (70hrs @ 70C)Tensile strength +3%
Elongation -15%
Hardness +2 points
Tensile strength +3%
Elongation -6%
Hardness +3 points
Tensile strength +5%
Elongation -1%
Hardness +3 points
Heat ageing determines the laggings ability to retain original physical properties
Oil resistanceNANAOil resistance as per table belowYes - in applications where oily materials are being conveyed
Continuous operating temperature range-40/+70°C-40/+70°C-40/+70°C
FRAS (Fire Resistant and Anti Static) MDG3608 and MSHA CertificationNAPassed & Certificates providedNAYes - in applications where FRAS products are a legislative requirement
Lagging Application MethodCold BondCold BondCold BondHot Vulcanised lagging provides much higher levels of adhesion and sealing compared to Cold Bond. Cold Bond application should only be used when Hot Vulcanising is not an option.Yes
Lagging Manufacturing processPress mouldedPress mouldedPress mouldedEliminates lagging internal delamination
Application Procedure and TestingLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyYes
Lagging Adhesion to Steel>12N/mm>12N/mm>12N/mmAdhesion test is mandatory for each pulley. Refer to Cold Bond Lagging Test Procedure for the process to follow.Yes
Ceramic SpecificationsNATURAL/SBRFRASOIL RESISTANTPERFORMANCE CRITICAL
Aluminium oxide>95%>95%>95%Yes
Specific gravity g/cm3>3.7>3.7>3.7
Vickers hardness HV (10)>1000>1000>1000Yes
Fracture Toughness (Mpa m1/2)>3.5>3.5>3.5Yes
Tile Cracking Force (min)>2000N>2000N>2000N
Tile Body Thickness exc dimple (min)4mm4mm4mm
Tile surfaces bonded to rubber5 sides of each tile5 sides of each tile5 sides of each tileYes
Force to remove ceramic tile from rubber (min)>200kg per tile and 100% rubber tear failure after a minimum of 12 months outdoor environmental exposure>200kg per tile and 100% rubber tear failure after a minimum of 12 months outdoor exposure>200kg per tile and 100% rubber tear failureYes
Ceramic Tile Adhesion GuaranteeNo debonding from rubber for the service life of the laggingNo debonding from rubber for the service life of the laggingNo debonding from rubber for the service life of the laggingYes
OIL TYPEOIL RESISTANT
Volume Swell%
Corn Oil10-20
Cotton Seed Oil10-20
Linseed Oil5-10
Olive Oil5-10
Peanut Oil10-20
Pinene10-20
Pine Oil>100
Rapeseed Oil5-10
Soybean Oil5-10
Terpineol>100
Tung Oil 5-10
Terpentine>100
Vegetable Oil10-20
White Pine Oil>100
White Oil5-10
Wood Oil5-10
Asphalt5-10
  • Lagging for both Drive and Non-Drive pulleys needs to be selected via an engineering analysis.
  • Lagging engineering analysis must provide justification that the lagging will prevent or minimise slip, and have sufficient fatigue resistance to provide the required service life.
  • Due to the low coefficient of friction, polyurethane lagging should only be used on Non-Drive pulleys.
  • *** Performance Critical specifications relate directly to the performance and life expectancy of the lagging. These should be included within every specification.
Hot Vulcanised Polyurethane Lagging
Polyurethane SpecificationsNATURAL/SBRNOTESPERFORMANCE CRITICAL
Hardness (shore A) ASTM D224085 +/-5
Tensile Strength DIN53504> 40 Mpa
Elongation at break ASTM D412> 500%
Abrasion resistance max vol. loss DIN 53516 method A (non-rotating)< 30mm3Abrasion resistance has a direct correlation to wear. The lower the number, the longer the wear service lifeYes
Continuous operating temperature range-40/+70°C
Recommended Lagging Application MethodCold BondHot Vulcanised lagging provides much higher levels of adhesion and sealing compared to Cold Bond. Cold Bond application should only be used when Hot Vulcanising is not an option.Yes
Lagging Manufacturing processPress mouldedEliminates lagging internal delamination
Application Procedure and TestingLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyYes
Lagging Adhesion to Steel>12N/mmAdhesion test is mandatory for each pulley. Refer to Cold Bond Lagging Test Procedure for the process to follow.Yes
  • Lagging for both Drive and Non-Drive pulleys needs to be selected via an engineering analysis.
  • Lagging engineering analysis must provide justification that the lagging will prevent or minimise slip, and have sufficient fatigue resistance to provide the required service life.
  • *** Performance Critical specifications relate directly to the performance and life expectancy of the lagging. These should be included within every specification.
Direct Bond Ceramic Lagging
Direct Bond Ceramic SpecificationsNon-DriveDriveNotesPERFORMANCE CRITICAL
Aluminium oxide92%95%Yes
Specific gravity g/cm33.63.7
Vickers hardness (HV10)>1000>1200Yes
Fracture Toughness (Mpa m1/2)3-43-4Yes
Continuous operating temperature range-20/+70°C-20/+70°C
Lagging Application MethodDirect Bond - Two Part EpoxyDirect Bond - Two Part Epoxy
Application Procedure and TestingLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyLagging Manufacturer to provide a Lagging Application Procedure which includes a QA Checklist and adhesion test for each pulleyYes
Lagging Adhesion to Steel (Shear test)>20 Mpa>20 MpaAdhesion test is mandatory for each pulley. Refer to Direct Bond Ceramic Lagging Test Procedure for the process to follow.Yes
Lagging Adhesion to Steel GuaranteeNo debonding from the pulley shell for the service life of the pulleyNo debonding from the pulley shell for the service life of the pulleyYes
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