Quality = stability
Råsjö Kross has tested wear parts from different suppliers over the years. The company has been tempted by low-price products at times, but Fredrik says quality pays off.
“Sometimes the purchase price has made it impossible not to try a product, but I have been disappointed one too many times. Now I want products we can trust — good quality with the right fit that last a long time,” explains Fredrik.
Metso and Råsjö Kross have been cooperating for many years, and they currently have an agreement in place for wear parts. Metso supplies the parts at specified times, giving both parties predictability and reliability.
Twice the wear life promised
In 2014, Råsjö Kross was given the opportunity to try out Metso’s new, patented solution MX jaw in its Nordberg® C125™ crusher. The MX jaw has a higher purchase price than Metso’s standard manganese jaws, but since Metso could promise twice the wear life or corresponding compensation, the choice was easy.
MX jaws are unique because the jaws are reinforced with durable material in areas where the jaws are exposed to extra wear. The reinforcement results in long wear life and thus offers better reliability for a machine that is meant to crush 400 metric tons per hour.
“It was quickly obvious that the wear on the MX jaws was less than on the jaws we had used previously. Also, the profile of the jaw remains unchanged throughout its lifetime, which means we can wear them out to the maximum extent. In addition to the reliability offered by a jaw that just keeps on crushing without running into any issues, the long wear life means we can save one day of service work per jaw. In other words, we get to skip one replacement round, which means our servicemen can be sent to other assignments,” says Fredrik.
The MX jaw lasts about twice as long as Metso’s standard jaw, which Råsjö Kross used previously — 450,000 metric tons compared with 220,000 metric tons. The increased wear life means that the fixed and the moving jaws in the C125 last about the same amount of time. Consequently, Råsjö Kross's service personnel who travel around to the various quarries to perform maintenance can avoid a trip, and fewer replacements automatically means greater safety.
“The less often we change parts, the fewer risks we are exposed to. The jaws from Metso also have a great fit and do not expand, which simplifies replacement,” says Fredrik.