Part 2 — Important Considerations for Jaw Crushers
Jaw Crusher Opening Size
Jaw crushers are referred to by two sets of numbers, the first being the opening size of the jaw; the second being the width. So, a "1036" jaw would accept a 10" boulder at the top and be 3' wide. If the pit where the jaw is being used has river rock which does not exceed 10" in size then this size crusher would be acceptable. Larger crushers are better choices when the average size is larger, such as where rock is blasted using explosives. The width of the jaw directly impacts its throughput rate.
Jaw Crusher Nip Angle
The nip angle describes the angle the stationary jaw plate and the pitman make with each other. The exact value of this angle isn't quoted or even determinable due to curvature in the jaws themselves but what is important is how wide vs. narrow it is. Wide nip angles can tend to expel material as the jaw closes as a large ball might squirt out from under a car tire. If the nip angle is narrow, not much vertical upward force is generated and more consistent crushing takes place.
Jaw crushers are referred to by two sets of numbers, the first being the opening size of the jaw; the second being the width. So, a "1036" jaw would accept a 10" boulder at the top and be 3' wide. If the pit where the jaw is being used has river rock which does not exceed 10" in size then this size crusher would be acceptable. Larger crushers are better choices when the average size is larger, such as where rock is blasted using explosives. The width of the jaw directly impacts its throughput rate.
Jaw Crusher Nip Angle
The nip angle describes the angle the stationary jaw plate and the pitman make with each other. The exact value of this angle isn't quoted or even determinable due to curvature in the jaws themselves but what is important is how wide vs. narrow it is. Wide nip angles can tend to expel material as the jaw closes as a large ball might squirt out from under a car tire. If the nip angle is narrow, not much vertical upward force is generated and more consistent crushing takes place.
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