Belt Type: UsFlex 630/1 6+3 RS

Industry: Quarry
Location: Ireland
Brief details of conveyor/application: Metso LT550 GP Tracked Cone Crusher
Type of material carried: Dolerite Rock 100mm down. Extremely hard, sharp & abrasive
Type and specification of Dunlop belt supplied: UsFlex 630/1 6+3 RS
Current operating life of Dunlop belt: 29 Months, with no repairs required during this period.
Type and specification of belt previously used: EP630/3 + Steel Breaker 8+3mm (Original Metso)
Manufacturer: Unknown, As supplied by Metso
Average life of competitors belt – months 12 Months. This belt had several clipped repairs during this time.
Background story – general explanation of circumstances: This quarry has some of the hardest and most abrasive rock in the country. The machine arrived following a 12-month trial period in another quarry and was then put to work at this site. The belt had been suffering from impact damage and damage from trapped material during this time and the situation worsened as soon as the machine was put to work in the hard stone quarry. The machine was first fitted with an UsFlex 630/1 belt in May 2007 and was replaced after 29 months only because of wear in the cover. This represented a 125% improvement in operational life compared to the previous belt type. During that time the belt did not require any clipping or maintenance work.
Extra information – general explanation of circumstances: The belt is hot vulcanized but good success has been achieved using clips on these mobile crushers (bolt plate & rivet hinge). The Feeder on this same machine uses a hardened hinge clip for fast and easy installation. It is important that only hardened clips are used.