Hammer Crusher Wear Parts

Hammers hang on pins between the rotor discs and swing as the rotor turns, striking the feed against the breaker plates and, in some designs, the grate. Because they swing, they absorb the impact, and they wear mainly on the striking edge.

The striking edge rounds off, product size grows and throughput falls. Wear is checked regularly - per shift is the usual practice on hammer crushers - and hammers are replaced as a matched set rather than one at a time, because uneven mass unbalances the rotor.

A hammer crusher rotor turns at production speed, so uneven hammer wear, or a single broken hammer, moves the centre of mass and shows up as vibration. Vibration is the early warning, and continuing to run with an unbalanced rotor puts additional load on the bearings and the shaft.

Many hammer designs can be rotated in position so that the second face becomes the striking edge, which extends the interval before replacement without changing the set. Whether your hammers are reversible depends on the profile, so check the drawing or the existing hammer before planning the change.

High-manganese steel is used where impact dominates, because it work-hardens under the blows, while alloy and high-chromium grades are used where the feed is abrasive and wear is more gradual. The choice follows the feed and the product size required, not the crusher model alone.

Send the crusher model, the hammer part number or drawing, and the key dimensions: overall length, bore or pin size and weight where it is known. Hammer mass has to stay within the rotor balance, so a weight figure is more useful than a photograph on its own.