Which Kleemann Crusher Is Right? A Rock Crusher Sourcing and Specification Guide

When I started in crushing equipment sales, I figured a rock crusher sourcing request was mostly about specifications: feed opening, horsepower, stroke, closed side setting. After fourteen years and well over two hundred machine and parts requests, I read it differently. The machine has to match the application. But which Kleemann crusher makes sense depends on why you are asking, not just what you are asking for.

Here's the first thing I tell any contractor or producer who asks about a Kleemann crusher: there is no single best model. There is a right process for replacing an old unit, a right process for building a new plant, and a different process for an emergency breakdown. Let's walk through all three.

Start with the situation, not the brochure

When I'm triaging a sourcing request, I sort it into one of three lanes:

• Replacement. You already have a crusher, and you need comparable or better production on the same site.
• New project or new product. You're starting from zero, or adding a finished aggregate that your current plant was never designed to produce.
• Emergency. The old crusher stopped, and downtime has started to cost money by the hour.

All three situations use the same Kleemann technical documentation, but they require different questions, different data, and different levels of speed.

Scenario 1: Replacing a crusher that almost works

Most replacement buyers already have production records. That is the best data you could give a dealer. If you know what your old plant produced at a specific closed side setting, for a specific feed, then nobody needs to sell you a fantasy. You already know what the material conditions look like.

Here is where the old way of thinking gets dangerous. I still see RFQs written like it's 2019: pick a crusher by maximum tons per hour. That was already incomplete, and by 2026 it's even more dangerous because plants are expected to be more autonomous, more fuel-efficient, and easier to integrate with screening and stockpiling equipment. The fundamentals haven't changed: feed material, reduction, and product curve. What has changed is how fast a bad match becomes visible in operating cost.

Take the popular Kleemann MC110i EVO2. The published spec sheet lists a jaw crusher inlet of 1,100 mm x 700 mm. That tells you what can fit into the crusher. It doesn't tell you whether the setup can hit your target tonnage at the closed side setting your contract requires. Those are two different conversations. If I'm coordinating a replacement, I ask to see the old plant's setup notes, not just the model number.

Replacement checklist

• Compare production at the closed side setting you actually have to run, not at the maximum number in the brochure.
• Check feed size distribution. A crusher can handle an oversize rock, but it cannot handle endless oversized feed efficiently.
• Confirm transport dimensions and site access. A newer model can be taller, longer, or heavier than the unit being removed.
• Ask about service access and parts availability before you fall in love with the upgrade.

My simple rule for replacement decisions: do not change the process at the same time you change the machine. If the old plant had a screening bottleneck, a new jaw crusher won't fix it. And if the old plant was fed poorly, a better crusher will just turn that poor feed into an expensive blockage faster.

Scenario 2: Building from scratch or adding a new product line

For a completely new project, the temptation is to start with a model because a neighbor runs one or because a rental fleet used it once. That's the wrong entry point. Start with the material you need to process and the product you need to sell.

Hard, abrasive rock like granite or basalt usually points you toward a jaw crusher for primary crushing, then a cone crusher for secondary and tertiary shaping. Softer, less abrasive rock such as limestone can often be handled more economically with an impact crusher. Recycling concrete and asphalt is a different application again. That is why Kleemann's range is split into MOBICAT jaw plants, MOBIREX impact plants, and MOBICONE cone plants. The first decision should be which family your material belongs to, not which showroom model catches your eye.

People ask me where to start in the Kleemann cone crusher catalog. My honest answer: not until your primary crusher and your screening arrangement are fixed. A cone crusher is rarely the first thing that should be sized. It depends on what the jaw or impact crusher sends to it, what percentage of fines you can remove before the cone, and what final gradation you actually need.

Once you know those answers, the cone crusher catalog becomes useful. That's when you compare crushing chamber configuration, discharge settings, and whether the machine can handle the recirculating load without stalling the process. The largest cone in the catalog is not automatically the best one. The right cone is the one that makes your required product curve without turning the rest of the plant into a bottleneck.

The counterintuitive part of new plant design is this: the crusher is rarely the most interesting decision. The screen, the chutes, the belt widths, and the stockpile arrangement usually cause more delays. I've seen plants with impressive crushers spend their first month trying to fix fines carryover and blocked transfer points. A rock crusher specification guide should include the full circuit, not just the crusher plate.

Scenario 3: When a broken crusher forces an emergency sourcing decision

This is the scenario I know best because a lot of my daily work is urgent. Last year, a producer called at 3:30 on a Friday because a secondary cone had failed. The obvious reaction was to find a replacement cone, arrange rush shipping, and accept the fastest availability date. But when I asked what was actually at risk, the answer was a rail ballast contract with a daily tonnage penalty.

We spent the first thirty minutes not on the crusher, but on the contract requirements and the available lead time. Then we matched the correct cone chamber and liner profile to the rock and the required gradation. The first machine the client wanted would have arrived later and with the wrong crushing chamber for their product. The machine they actually sourced had the right chamber, had parts support behind it, and was in production within days.

When I'm triaging a rush order, I ask about consequences before I ask about preferences. If missing a deadline means losing a permanent supply contract, the risk calculation is different than if you just want to avoid two weeks of rental cost. That's why emergency purchases need a different discipline:

• Write down the minimum weekly tonnage you need, not the maximum output you want.
• Confirm what will feed the machine and what will receive its product. A quick portable setup is useless if the loadout belt can't handle it.
• Get transport dimensions and weight permits into the decision. The fastest crusher in stock still needs to get to the site.
• Verify spare parts and service support before the machine arrives. A used or rental machine can be a smart bridge, but not if it becomes an orphan on your site.

Urgency should remove hesitation, not engineering judgment. The best emergency purchase is not the fastest quote. It's the shortest path from broken down to producing at the quality your customer will accept.

How to know which situation you're in

If more than one of these three situations applies to you, take the emergency lane first. Stabilize the current revenue loss before you design the ideal long-term plant. That may mean renting equipment, buying time with a smaller machine, or ordering a replacement that fits the existing site instead of waiting for the perfect plant.

Ask yourself three questions:

1. Do I have years of data from an existing crusher on similar material? If yes, the replacement scenario should dominate your decisions.
2. Is there an actual contract or product specification that the new plant must hit? If yes, work backward from that product spec, not from the crusher model.
3. Is downtime already costing me money by the day or by the hour? If yes, make speed and serviceability your first specs, but never let them erase the material requirements.

Most sourcing mistakes happen when buyers mix the three situations. They buy a replacement when they actually need a new process, or they buy an emergency machine when they should have designed a proper secondary circuit. Both mistakes are expensive in different ways.

So which Kleemann crusher do you need? The one you can feed, transport, support, and match to your real material. That sounds like a boring answer until your plant is stopped. Then it's the difference between buying a machine and solving a problem.