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| Model | Power (kW) | Max Feed Size (mm) | CSS Range (mm) | Capacity (t/h) | Weight (kg) |
|---|---|---|---|---|---|
| RC30 | 75-90 | 50-150 | 5-41 | 30-130 | 7,200 |
| RC43 | 200-250 | 75-200 | 8-44 | 100-495 | 24,500 |
| RC50 | 250-315 | 85-215 | 10-48 | 215-815 | 30,500 |
| RC55 | 315-355 | 90-235 | 10-51 | 265-900 | 32,500 |
| RC65 | 355-400 | 100-265 | 13-54 | 335-1,400 | 52,000 |
| RC70 | 400-450 | 110-280 | 13-60 | 435-1,700 | 56,000 |
| RC80 | 630-710 | 120-360 | 16-65 | 580-2,500 | 92,000 |
| RC86 | 800-900 | 140-480 | 16-65 | 890-3,500 | 125,000 |
| RC110 | 1,000-1,250 | 110-600 | 19-65 | 1,205-4,500 | 183,000 |
| Model | Power (kW) | Max Feed Size (mm) | CSS Range (mm) | Capacity (t/h) | Weight (kg) |
|---|---|---|---|---|---|
| MRC40 | 200 | 275 | 10-45 | 120-490 | 16,600 |
| MRC45 | 280 | 325 | 13-51 | 190-680 | 22,000 |
| MRC54 | 315 | 300 | 13-51 | 240-805 | 34,500 |
| MRC66 | 400 | 400 | 16-51 | 280-1,015 | 43,000 |
| Model | Power (kW) | Max Feed Size (mm) | CSS Range (mm) | Capacity (t/h) | Weight (kg) |
|---|---|---|---|---|---|
| MHP100 | 90-110 | 50-140 | 6-32 | 45-140 | 5,500 |
| MHP200 | 132-160 | 60-190 | 8-38 | 90-250 | 10,500 |
| MHP300 | 220-250 | 70-230 | 10-38 | 115-440 | 16,000 |
| MHP400 | 315-355 | 80-280 | 10-44 | 140-630 | 23,000 |
| MHP500 | 355-400 | 90-320 | 13-44 | 175-790 | 33,500 |
| MHP600 | 400-450 | 100-360 | 13-51 | 220-900 | 45,500 |
| MHP800 | 560-630 | 120-420 | 16-51 | 260-1,200 | 68,900 |
| MHP900 | 710-800 | 150-450 | 19-51 | 300-1,480 | 80,500 |
Notes: capacities are based on dry, medium-hard rock with a bulk density of one point six tonnes per cubic metre and a well-graded choke feed; actual throughput depends on ore hardness, feed gradation, moisture and the selected chamber. Closed side setting ranges: RC five to sixty-five millimetres, MRC ten to fifty-one millimetres, MHP six to fifty-one millimetres. Max feed size varies with the chamber fitted. Contact Ormaise for chamber selection against your ore test data.
Stock-listed crushing and screening equipment manufacturer, serving 2,000+ operations since 2003.
A cone crusher reduces medium-hard to very hard rock and ore in the secondary, tertiary and sometimes quaternary stages of a crushing plant. Typical feed comes from a jaw crusher or gyratory crusher, and typical applications include granite, basalt, river gravel, iron ore, copper ore and gold ore. It is the standard choice when the plant needs a cubic, well-graded product at high reduction ratios.
An electric motor drives the eccentric assembly through a bevel gear, making the main shaft and mantle gyrate inside the fixed concave. Rock entering the chamber is squeezed and broken in a laminated, inter-particle way each time the gap closes, then falls by gravity as the gap opens. Broken material discharges continuously through the closed side setting at the bottom of the chamber.
A single cylinder hydraulic cone crusher uses one large hydraulic cylinder under the main shaft for setting adjustment and tramp protection. It has a simpler structure, lower height and lower operating cost, and suits secondary and coarse tertiary duty at high capacity. A multi cylinder hydraulic cone crusher uses several cylinders around the frame, carries higher installed power on the same frame size, and holds a tighter setting under load, which gives a finer product on hard and abrasive ore. As a working rule, choose single-cylinder for medium crushing and multi-cylinder for fine crushing, and lean toward multi-cylinder as the ore gets harder.
The classic Symons design is a spring cone crusher: bowl adjustment by thread and shim, springs for tramp relief, and largely manual operation. It is simple and still common in older plants, but setting changes take the machine off line and tramp recovery is slow. A modern hydraulic cone crusher adjusts the closed side setting hydraulically in real time, clears a stalled cavity from the control cabinet, and protects itself against tramp iron automatically, so availability and product consistency are both higher.
After primary crushing. In a typical three-stage plant, a jaw crusher or gyratory crusher prepares the feed, the cone crusher handles secondary and tertiary reduction, and screens close the circuit by returning oversize. For softer, less abrasive stone, an impact crusher may take the secondary position instead, but for hard ore the cone crusher is the usual selection.
Match the chamber to the feed size and the product target. Coarse and standard chambers accept larger secondary feed; medium and fine chambers take smaller feed and produce finer gradation for tertiary duty. On Ormaise machines the same frame accepts several chambers, so you can start coarse and convert to fine later with a liner change. Send your ore hardness, feed gradation and target product size to our engineers and they will return a chamber recommendation.
Liner life depends on ore abrasiveness, chamber profile, setting and feeding practice. High-manganese mantles and concaves in highly abrasive duties such as basalt may need change-out after a few hundred operating hours, while life on less abrasive limestone or copper ore is much longer. Keeping the chamber choke-fed and the setting stable is the single most effective way to extend liner life and keep wear even around the chamber.
Ormaise supplies original-specification mantles, concaves and other wear and spare parts with the material certificates of the machine they fit, plus remote diagnostics, commissioning support and operator training. Because each machine ships with a full digital record and a factory test report, parts and service questions are answered against the actual build data of your unit.
In a cone crusher the chamber stays full during normal operation, so rock breaks against rock as much as against the liners. This laminated, inter-particle breakage acts on the natural weakness planes of each particle and releases fines already present in the feed. Compared with single-particle crushing, the product carries fewer flaky and elongated pieces, the gradation curve is tighter, and liner wear is spread evenly around the chamber. For aggregate producers this means a higher sellable fraction per tonne of feed; for mining plants it means a steadier, finer feed to the grinding circuit.
A hard-rock plant usually runs three stages. A jaw crusher or, at higher capacities, a gyratory crusher takes the run-of-mine feed down to a size the secondary stage can accept. The cone crusher then works as the secondary and tertiary machine, operating in closed circuit with a vibrating screen that returns oversize for another pass. Where the stone is softer and less abrasive, an impact crusher may replace the cone in the secondary position; for very large plants the whole line can also be mounted as a mobile crushing station. As a rule of thumb, jaw plants give way to gyratory plants once the feed rate passes roughly one thousand tonnes per hour, and the cone stages follow the same capacity step.
Both types adjust the closed side setting hydraulically and protect themselves against tramp iron, but they do it with different structures and suit different duties:
| Item | Single Cylinder Hydraulic | Multi Cylinder Hydraulic |
|---|---|---|
| Structure | One cylinder under the main shaft; fewer parts, lower profile | Several cylinders around the frame; more compact drive line |
| Best position | Secondary and coarse tertiary crushing | Medium, fine and extra-fine crushing |
| Ore hardness | Medium-hard to hard rock | Hard to very hard, abrasive ore; advantage grows with hardness |
| Product | Coarser gradation, high throughput per kilowatt | Finer gradation, higher reduction ratio, better particle shape |
| Operating cost | Lower parts count and simpler maintenance | Higher installed power, higher wear cost per tonne, offset by finer product |
| Ormaise series | RC, 75-1,250 kW, up to 4,500 t/h | MRC and MHP, 90-800 kW, up to 1,480 t/h |
A practical selection rule used by many plant designers: choose single-cylinder for the medium crushing stage and multi-cylinder for the fine crushing stage; the harder the ore, the stronger the case for multi-cylinder in every stage after the secondary.
The Symons cone crusher established the basic chamber geometry still used today, but its spring tramp relief and threaded, shim-based bowl adjustment belong to an era of manual operation. Changing the setting on a spring cone crusher means stopping the machine and working around the bowl; clearing a stalled cavity after a power trip can take hours of manual digging. Modern hydraulic machines moved these tasks into the control system: the setting is adjusted under load, tramp events are absorbed and recovered automatically, and cavity clearing is push-button. Plants replacing spring machines with hydraulic cone crushers typically gain availability, a more consistent product, and a safer clearing procedure. Ormaise RC, MRC and MHP series all follow the hydraulic route, with rolling bearings in the RC series replacing the traditional copper sleeve arrangement to cut friction and extend lubricant life.
Chamber choice follows feed size and product target: coarse and standard chambers for secondary duty with larger feed, medium and fine chambers for tertiary duty with a finer product. Because Ormaise machines accept several chambers on one frame, the conversion between duties takes only a liner change on the same frame. Whatever the chamber, keep the crusher choke-fed: a full chamber is what makes laminated crushing work, evens out liner wear, and stabilises power draw. Segregated or trickle feeding shortens liner life and produces a coarser, less consistent gradation. Avoid feeding sticky or wet material directly; pre-screen or wash first, because packing in the chamber defeats both capacity and product shape.
The mantle and concave are the main wear items. Their life depends on ore abrasiveness, chamber profile, setting and feeding practice: in highly abrasive duties such as basalt, high-manganese liners may need change-out after several hundred hours, while less abrasive ores run far longer. Use tonnes crushed per liner set as the planning basis, and plan change-outs with the screen media and mill liner schedule so the whole circuit stops together. Ormaise supplies original-specification mantles, concaves and spare parts matched to the build record of each machine, which keeps fit and material consistent across the life of the plant.
