You have to be careful in using a jaw crusher as your primary and finishing crusher. Jaw crushers make a very slender, elongated product. This is fine for some farmer or some company who has a very, very loose spec.

Typically, jaw crushers are used as primaries that feed a secondary crusher which does the final shaping and sizing.

The best "bang for your buck" crusher would a horizontal shaft impact crusher. It has a high reduction ratio, excellent particle shape, and you can recirculate oversize off a screen and send it back to the crusher. The big disadvantage to a HSI is the operating costs ($.10 to $.25 per ton) and maintenance. Even a small 40"x34" HSI can reduce 20" concrete to -3" (90% under -1") at a rate of 75-100TPH.

Of course, if money was no object, you would run jaw crusher to screen to cone and back to the screen.