Crusher Wear Parts

You've got a lot of options to look at before taking on making something yourself from scratch. Your inquiry doesn't note what type of crusher you're considering - there are as many types and sizes of crushers as there are foreign automobiles.

Size is the issue where you'll have to make your most difficult decision. Don't cut yourself short on what you figure you're going to be crushing, with whatever you get: a machine that's a little bigger than you'd think is necessary is better -- much better.

The most common machines are jaw crushers and cone crushers, followed by impactor and roll crushers. Domestic North American manufacturers of several suitable crushing machines are: Johnson Crushers International (Eugene, OR); Cedarapids, Inc. (Cedar Rapids, IA); and Telsmith, Inc. (Mequon, WI). Making the best choice of machine is predicated on defining what you intend to crush with it. There's also a tremendous used crusher market out there -- your local equipment dealers may find something suitable for you.

This will be an opinion-based response with plenty of counter views, but it goes like this:

The rotation of the mainshaft in a cone crusher is similar to (but not the same as) that of a crankshaft in an automotive application. There's plenty of "bumps and bangs" along the way with each revolution. These "bumps and bangs" could be considered similar to detonation, while the revolution itself is a smooth series of power strokes.

Retention and guidance of the shaft by itself is best suited to bushing-like confinement. A bushing with proper clearance and oil pressure is more than adequate to serve as the source of guidance and support, while being more forgiving in its willingness to accept the "bumps and bangs".

Bearings are more suitable in rotating assemblies that are not subjected to interruptions in a smooth transfer of motion. A wheel bearing, for example, has a suspension, shock absorbing device and a tire sidewall to absorb those "bumps and bangs". Bushings have their place, as do roller bearings. Rollers may be a bit too scientific for a rock crusher.

Here's my opinionated suggestion for a crusher -- hands down, a genuine Symons cone. We make parts for most all of the different crushers in the world, and we get to the bottom line the easiest, furthest and fastest with the original Symons cone crushers, for a multitude of reasons. That's an opinion that opens avenues of debate as well.

Having heard and seen all the stories, that's the view from here.

We have patterns for several models of the original Birdsboro-Buchanan jaw crushers and some even with slab-tooth design jaw dies here at Columbia Steel. If basic pattern equipment exists for a given model of the Birdsboro crusher, we can get to a "slab buster" jaw design fairly easy. If the basic pattern equipment doesn't exist, then the cost of the project is amplified considerably.

In order to identify what parts you need, it's important that the size and model type are identified properly. It's even better to find the actual part numbers on the castings needed. Old Birdsboro went about doing things more than one way. For example, they'd call out a crusher as 60x84 type "C". There can be another version of a similar sized crusher known as a 60x84 type "C-DF" -- and it would use altogether different parts than the other one.

The people that are really in the know on these crushers, and who may make some of the other items you're looking for, are known as P.R. Engineering in Oshawa, Ontario. They may be able to help you with the spacer wedge and toggles. There's another outfit up there in Kitchener, Ontario, known as Automatic Welding Machine and Supply Company that specializes in hydraulic toggles for many different models of jaw crushers. They make some pretty nice gear. Let our Columbia Customer Service Department know if we can help you with the "slab busters".

Had to do some research on this one with our resident Cedarapids expert (he used to sell them), and we came up blank as far as the original CR ever being involved in out-of-the country licenses. The older line mining crusher suppliers like Traylor Engineering (now FFE Minerals), or Allis-Chalmers (now Metso) were the jaw crusher manufacturers most likely to get involved in short lived arrangements like that.

Currently there is a new model with a crusher that size, the “world crusher” (that’s a Jaques / Cedarapids deal from Terex). Jaw dies for this crusher look like a Cedarapids with the stable jaw having end flanges with cheek plate lands on the sides, and the movable jaw just having the tapered ends -- held in with a wedge.

Not much help I’m afraid. Sketches with the basic fitting dimensions can be compared to existing equipment to make a cross match. That kind of information combined with photos work pretty well for identification. We’ve had to do that many times on inquiries like this.

Here’s a series of short, easy-to-answer questions that make resolving your kind of situation a straight forward deal. They’re as follows:

1. What is the largest size material going into the crusher? (the size by 2 dimensions, i.e. 4 inches x 3 inches)

2. What size range (again, by 2 dimensions) does 50 percent of the gross feed material fall into?

3. What is the actual physical discharge setting of the crushers?

The two 7-foot standard cones in normal crushing conditions may be run at a 1.500 inch c.s.s. and would send the S.H. cones a moderate percentage of 3 inch by 2 inch material in an open circuit. The 50 percent size range would be something like 1.500 inches by .750 inch material and if in a closed circuit, a finer feed blend would be prevalent.

The liners you are using sound to be either be too fine for the job, or are losing their available feed opening thru normal wear. With the 30 day liner changes that you’re experiencing, that loss of feed opening becomes apparent within the first 25 percent of the liners’ life. The seeming high wear rate near the top of the liner set you describe begins near that same time and progressively diminishes gross output rate.

This is the most common phenomena present in cone liners and the subject we deal with most often when providing our Hi-Pro / H-D liner profiles. The object is to provide liner sets that will accept large feed size of a given blend through total expenditure of the liners, while still providing the percentage of sized discharge material required. Simply applying coarser liners doesn’t fix the condition.

This increasing of the feed opening is often misunderstood as an attempt to allow for larger reduction ratios. That’s not the case at all -- we just don’t put wear metal where it’s not needed.

That’s the rate of wear you’re seeing in the liners you use now. In your case, we’d likely provide a fine to medium liner set with an increased feed opening. These are the kind of liners that allow the top sized feed material to be accepted by the liners on the closed side (or at least for within 15 degrees of the closed side at the top circumference of the crusher.) We’d need to know what sizing requirements you have for these crushers in order to offer a specific liner set for the need.

Your question is common to what we deal with daily for most models of crushers. For example, for 7-foot Symons crushers in particular, we’ve developed several options in degrees of fine verses feed opening and thickness. Your situation is common and reasonably easy to deal with.