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(1) Large receiving opening per dollar of investment.
(2) Shape of receiving opening favorable for blocky feed. This, plus point 1, give the jaw a definite advantage over the gyratory, except in the very large sizes, for handling rock of massive formation.
(3) The jaw crusher is more easily adjusted, to compensate for wear of liners. This is particularly true in the larger sizes, and the range of adjustment is greater in all sizes.
(4) The jaw crusher does not lose any of its "new-condition" throw when the babbitt wears in the main, or in the pitman, bearings.
(5) The jaw crusher will handle sticky or dirty feed better than the gyratory, there being no diaphragm below the crushing chamber on which such material can pack.
(6) Routine maintenance and repair jobs are generally more easily accomplished on the jaw crusher than on the gyratory. Major repairs are about a standoff.
(7) For crushing extremely hard, tough material s extra strength can be built into the jaw crusher at less extra expense than in the gyratory.
So-called "standard" designs, i.e., un-reinforced, are usually more rugged than the standard design of gyratory.
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