How to Change Jaw Liners
Metso conducts extensive research into liner materials and profiles in an effort to constantly improve jaw liner life whilst maintaining maximum productivity.
Turning Jaw Liners correctly and or replacing them at the correct time can reduce stoppages, reduce power draw, improve jaw liner life as well as fragmentation. The procedures explained below are best practices recommended by Metso.
Two-piece jaw liner rotation and replacement
- Worn out jaw liners are removed from the bottom of the crushing chamber
- Work hardened upper jaw liners are installed at the bottom of the crushing chamber
- New jaw liners are installed at the top of the crushing chamber
This procedure will allow for good work hardening of the manganese jaw liners, and maintain the best nip angle for maximum though put.
One piece jaw liner rotation and replacement
- After a new jaw liner installation, rotate the single piece jaw liner when 30% of the tooth profile is worn
- Rotate a second time when the tooth profile at the bottom of the jaw liner is completely worn
This procedure will allow for good work hardening of the manganese jaw dies, and maintain the best nip angle for maximum throughput.
TIPS TO EXTEND LINER LIFE
Follow these steps after new liners are installed:
- Operate at 50% rated power (65% amps) with a full cavity for 6 hours
- Operate at 75% rated power (80% amps) with full cavity for 2 hours
- Operate at or near 100% rated power (100% amps) from this point on
*This technical tip was brought to you by Metso