Crusher Wear Parts

By as many variations as there are available! The simplest response is to identify a tooth form with a pitch and depth that'll last the longest while also providing a constant output rate. The more wear metal that can be packed into the tooth shape, the longer it maintains that shape, as long as nothing detrimental results from that sectional shape.

Coarsely pitched, deep teeth will provide greater service life -- as long as the included flank angles aren't so steep as to trap, jamb or pack enough rock to plug the exit route for the crushed rock that breaks from the point pressure of the opposing tooth crowns. High toothed jaws are those in which the depth of tooth exceeds half the tooth pitch. Although shorter tooth depths (relative to the pitch, with a more open root detail) are not as long lasting, they excel in processing sticky material. Finer pitched round or sharp teeth produce a finer blend of finished product, though again while not as long lasting as the coarser high tooth designs.

The size of the crusher will also have a proportionate affect on the tooth pitch coarseness. Some examples: A fine tooth for a large 66 x 84 primary crusher would be spaced at 6 inches, while a coarse tooth would be spaced at 8 to 10 inches. A 2-inch pitch, like those found on a 10 x 24 crusher, would be too fine for the large model. The intermediate crushers in the 30 to 40 x 36 to 48 inch models have a broader range of tooth-spacing coarseness. It's not uncommon to see tooth forms from 3 to 8 inches applied to that range of crusher sizes.

We've been fortunate at Columbia Steel to have the foundry talent and pattern making abilities to provide about any tooth form required. The specialty tooth forms, such as the slab tooth, variable pitch, or flow groove types, are individual subjects of they're own.