Jaw Crusher Wear Parts

The wear set is built around the fixed jaw plate, which lines the stationary jaw, and the movable (swing) jaw plate, which lines the moving jaw. Toggle plates, wedges and side plates also wear, and they are usually reviewed at the same time as the plates so the whole set can be planned together.

Corrugated plates grip the feed and are the usual choice for primary crushing of run-of-mine rock, while smoother plates suit a smaller, more even feed. The profile changes the nip angle and the product gradation, so the safest starting point is the profile originally specified for your crusher.

Published industry guidance puts jaw plate life at roughly three to six months in typical service, but the figure varies widely with feed hardness, throughput and setting. Hard abrasive rock such as granite wears plates far faster than softer limestone, so wear is better tracked against tonnes produced than against the calendar.

The teeth round off and lose their grip, throughput falls, product size grows and power draw per tonne rises. Measure the remaining plate thickness against a new plate and change it before the plate wears through, because a plate run past its limit exposes the jaw body and the seating surfaces.

Manganese steel in the 14-18 per cent range work-hardens under impact and compression: the working surface hardens while the core stays tough, which is why it is the usual choice for primary crushing. In a low-impact application the surface does not harden as much as expected, so the duty has to be described when the material is reviewed.

Yes, provided the profile is described. Send the crusher model, the part number, the drawing or the worn plate, and confirm the fixing method - wedges, corrugations or bolts - together with the plate dimensions. The mounting details must match, because the crushing forces are carried through them.