— The nip angle is affected by the distance between the rolls. The nip angle is defined as the angle that is tangent to the roll surface at the points of contact between the rolls and the particle. It depends on the surface characteristics of the rolls.

 — The nip point is that portion of the crushing surface that is the first to come into contact with the rock to break it. The 'first of these three, the hardness, will regulate the feed rate by the output of energy that will be required to break it.

Gyratory crushers are one of the main primary crusher types used in mines and quarries. The size designation of gyratory crushers is based on the size of the feed opening and the mantle diameter. Main features • Steep crushing chamber and long crushing surfaces for exception-ally high capacity and maximum liner life

 — The nip angle is the angle between the fixed and movable jaw dies. Too large a nip angle reduces the capacity and increases the wear as the feed material grinds and gouges the jaw dies in an upwards direction …

Angle of nip varies for large crusher between 21 °to 24 °. For curved surfaces, the nip varies from 27 ° to 30 °. The distances between the concave surface and the mantle on top and bottom are usually used to describe the size of the crusher.

 — The angle of nip for large crushers varies between 21° and 24° (average about 22°) but for curved surfaces it is about 27–30° [2]. The distances of openings between the concave and the breaking head at the top and the bottom ends are usually used to describe the size of the gyratory crusher.

Nip Angle. Early gyratory crushers with straightelement crushing surfam used nip angles of from 21° to 24O with an average near 22'. In present gyratory crushers where gravity is of marked aid to nip with the large pieces at the mouth, and with curved surfaces, the angle of nip ranges from 25" to 30".

5.1 Jaw and Gyratory Crushers. stly for primary crushing. They are characterized by wide gape and narrow discharge and are designed to handle la. The capacity of the crusher is determined by its size. ial that can be accepted. Maximum size that can be accepted into the crusher is app.

 — The closed-side setting of a jaw crusher helps determine the nip angle within a chamber, typically 19 to 23 degrees. Too large of an angle causes boiling in the crushing chamber. This is where the jaw plates cannot grip onto the rock, and it keeps slipping up and down, avoiding being crushed.

 — The crushing force is an important performance index of the gyratory crusher, which is related to the geometric parameters of the crushing chamber and the size of the eccentric angle. Its size and distribution directly affect …