Wear Indicator Rubber Lagging

Wear Indicator Rubber Lagging is popular having a visual indication on when the lagging needs to be scheduled for replacement.

Elastotec Wear Indicator Rubber Lagging has been developed to provide mining companies with a long life lagging that will provide a visual indication when the abrasion resistant lagging has been worn away and the lagging should be scheduled for replacement. The coloured wear indicator layer is designed to indicate when the lagging replacement is required and to also provide protection for the pulley shell while lagging replacement is scheduled.

Category:Elastotec Rubber Lagging Tag:Hot Vulcanised

Description

Description

Application

The primary aim is to prevent wear of the pulley shell that may lead to the need for an expensive replacement of the whole pulley. Many mines spend considerable time measuring the thickness of the lagging on the pulleys once in service to keep track of replacement requirements. This normally involves operators using ultrasound techniques on the pulley surface during shutdowns to record the remaining thickness of the lagging. A visual alarm while conveyor is running reduces likelihood of pulley shell wear as well as maintenance hours for lagging control.

Key features and benefits

Rubber backing developed in conjunction with ARDL (Akron Rubber Development Laboratory) to retain ﬂexibility at low temperature (-50°C).
High performance abrasion resistant synthetic elastomer.
Coloured wear indicator layer below abrasion resistant layer.
Proven bonding system between abrasion resistant synthetic elastomer and CN backing coloured rubber.
Coloured wear indicator (Blue for SBR and Red for FRAS).
High quality rubber formulations designed for good bonding, resistance to degradation by outdoor exposure, and good abrasion resistance.
To be applied though hot vulcanising method to eliminate the chance of lagging debonding from pulley shell and separation on joins.
Can be supplied in a range of thicknesses (15, 20 and 25mm).
Suitable for long term service at temperatures from - 40°C to +70°C.

Design

Elastotec Wear Indicator Rubber Lagging has a bottom coloured rubber layer to indicate the need for lagging replacement.

Simple system that provides an easy to recognize visual indicator that the abrasion resistant diamond lagging layer has worn through and should be scheduled for replacement. Provides a margin of safety by identifying wear before contact / damage to the pulley shell occurs.

Rubber Specifications

Typical values

	NAT	FRAS
Polymer	SBR	Blend
Tensile strength (MPa) min ISO37	18.0	16.0
% Elongation min ISO37	550%	500%
Hardness (shore A) ISO868	65+/-5	65+/-5
Abrasion resistance max vol. loss ISO 4649 method A (non-rotating)	70mm³	150mm³
FRAS - MDG 3608	N/A	PASS
Heat ageing (Property change after 70°C 168hs)	Tensile strength +1% Elongation -15% Hardness 5 points	Tensile strength +5% Elongation -1% Hardness 3 points
Continuous operating temperature	-40/+70°C	-40/+70°C

Lagging Specifications – Wear Indicator Lagging

HOT VULCANISED - NAT

DIMENSIONS

PRODUCT	CODE	WIDTH	THICKNESS	LENGTH	WEIGHT/lm
Wear Indicator Lagging 15mm	ELA-WI-DIA-N-15V	251mm-255mm	16mm-17.2mm	9.7m	6.50kg
Wear Indicator Lagging 20mm	ELA-WI-DIA-N-20V	251mm-255mm	16mm-17.2mm	9.7m	8.32kg
Wear Indicator Lagging 25mm	ELA-WI-DIA-N-25V	251mm-255mm	26mm-27.2mm	9.7m	10.32kg

Product code for diﬀerent lengths: Add 5-digit number indicating length in mm.

Strip length to always be 100mm longer than face width to allow overhang for trimming after application.

Example:
Roll: 25mm 9.7m roll hot vulcanised product code: ELA-WI-DIA-N-20V-09700
Strip: 15mm hot vulcanising 1.2m strip length product code: ELA-WI-DIA-N-15V-01200

Thickness variation (all strips/pulley) +/-0.5mm

Ceramic lagging with thickness > 15mm only recommended for pulleys with diameters over 600mm.

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