The presence of chert in the material being reduced indicates a silica content that will have a bearing on the alloy best suited to what you’re crushing.

The general rule we use to determine best alloy choice (carbon/manganese levels) is partially based on the silica content of the crushed material. At a silica content exceeding .4, the value of using the high alloy manganese materials diminishes.

Regarding the design of the jaw dies themselves -- one of the high tooth jaw designs we have available would be most appropriate. The more abrasive the material being crushed, the more beneficial a higher tooth form becomes. High tooth jaw dies are available in various curve rates (dependent on sizing requirements) and with tooth depths varying from 3.000 inches to 5.000 inches, based on common coarse 6-inch tooth pitches.

In order to make the very best choice in jaw dies, the questions we’d ask are:
1. What is the very top size feed material going to the crusher in 2 axis?
2. What size range does 50% of the gross feed material fall into?
3. What is the desired finish product size from this crusher?
4. What is the silica content and compressive strength of the material being reduced?
5. What is the nature of the material being crushed (shot rock, any slabs, naturals, and are the fines minus the discharge settings scalped from the feed material)?

That Pioneer crusher you have is a good piece of equipment, and a lot of replacement wear parts have been developed for it. Our customer service department can help you with a specific choice, or you can contact our engineering department here as well. Thanks for the question -- and yes there’s a ready solution.