Feeding width meaning of jaw crusher model parameters

Feeding width meaning of jaw crusher model parameters

Feeding width (also called feed opening width) is one of the core marked parameters of a jaw crusher, usually the horizontal width of the top feed inlet. It is the main basis for jaw crusher model naming, e.g., PE 600×900 jaw crusher: 600 mm = feeding width, 900 mm = feed opening depth.

Core definition

Feeding width: the maximum horizontal distance between the two side liners at the crusher feed opening.

Note: It is not the maximum lump size of raw material. Rule of thumb: the maximum feed lump size should generally be 80%–85% of the feeding width, to avoid material jamming and bridging at the inlet.

Functions & significance

  1. Model identification standard: PE/PEV series jaw crushers are conventionally named by feeding width × feed depth. Customers can quickly judge machine size at a glance.
  2. Raw material limitation: It sets an upper limit for the block size of incoming ore. Oversized rocks cannot enter the crushing chamber and need pre-screening or secondary blasting.
  3. Capacity reference indicator: Larger feeding width usually matches a larger crushing cavity, supporting higher hourly throughput, on the premise of matched motor power and discharge setting.
  4. Equipment layout matching: Engineers use feeding width to select the matched feeder width. The feeder’s effective feeding width should be slightly smaller than crusher feed width for smooth feeding.

Distinction from easy‑confused parameters

  • Feeding width: Horizontal dimension of feed port (the first number in model)
  • Feed opening depth: Vertical distance from top inlet to the turning point of jaw plate (the second number in model)
  • Maximum feed size: Recommended actual largest ore block, always less than feeding width
  • Discharge opening: Adjustable gap at the bottom outlet, controls finished product particle size

Practical reminder

If raw stones frequently exceed 85% of feeding width, frequent blocking, uneven jaw plate wear, overload current and machine vibration will occur. For hard rock mines, the safety margin is suggested to be increased to 75%–80% of feeding width.