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.
Coloured logo
Repeating diamond pattern.
Abrasion and tear resistance rubber.
3 cutting location sipe
Edge sipe
Wear indicator CN buffed adhesion layer
Uncured bonding layer
Plastic release liner
Rubber Specifications
| 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
| 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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