Jaw plates are the highest-consumption wear part in a primary crushing circuit. The fixed and moving plates must be changed as a pair, and the tooth profile controls both the nip angle and the product size.
Grindium casts jaw plates in Mn13Cr2 and Mn18Cr2 for standard and heavy-duty jaws, with corrugated, smooth or toothed profiles, and in high chrome Cr26 for abrasive gravel where impact is moderate.
Material selection
Material
Hardness
Best for
Mn13Cr2
HB 180-220 (to 450+ work hardened)
General quarry and mine primary crushing
Mn18Cr2
HB 180-220 (to 500+ work hardened)
Large feed, hard rock, high impact
High chrome Cr26
HRC 58-62
Abrasive gravel, recycling, low impact
Profiles and fits
Corrugated profile for general crushing
Toothed profile for slip-prone, rounded feed
Smooth profile for fine jaw and laboratory crushers
PE 150×250 to PE 1200×1500, PEX series
Metso C80-C200, Sandvik JM series, custom drawings
Why pairs matter
A worn moving plate against a new fixed plate changes the nip angle and reduces throughput, and the new plate wears faster as a result. We quote both plates as a set, with the same heat treatment and profile height, so the chamber stays symmetrical through its whole life.
