The spring cone is the oldest reliable answer to secondary crushing, and it is still the cheapest way to put a cone into a plant that runs on a weak grid with a two-man maintenance team. Crushing force is resisted by a ring of springs around the frame: when an uncrushable lump enters, the springs compress, the bowl lifts, the lump passes, and the machine carries on.
There is no hydraulic power unit, no PLC and no oil-temperature interlock to trip. Setting adjustment is mechanical rather than hydraulic, which costs you some convenience and saves you an entire subsystem that can fail at 2 a.m. on a site 400 km from the nearest town.
Typical duty: secondary crushing of basalt, granite, river gravel and iron ore from 110 to 610 t/h; also widely used as the second stage on mobile-plant-based contractor lines where service access is the binding constraint.
Product and workshop photographs from our own production lines — Hangzhou, Weihai and Wuhu.
Design & working principle
- Spring overload protection — no hydraulic circuit to maintain; the spring stack is the safety device.
- Rigid cast frame with replaceable wear surfaces — rebuildable rather than disposable.
- Six model/duty combinations — coarse (C) and medium (Z) cavities from 1200 to 1650 mm.
- Simple, serviceable drive train — parts that a competent site mechanic can replace with hand tools and the manual.
- Low installation burden — no oil station footprint, no cooling water, minimal foundation requirements.
Parameter table
Published as a real HTML table, not a PDF or an image — so it can be read, copied and indexed. Figures are from our own product documentation; the datasheet and GA drawing follow on request.
| Model | Duty | Stroke (mm) | Max feed size (mm) | Discharge setting (mm) | Capacity, open circuit (t/h) | Motor power (kW) | Weight (t) |
|---|---|---|---|---|---|---|---|
| SJ.1200C-D | Coarse | 22 | 180 | 19–50 | 110–250 | 132 | 16 |
| SJ.1400C-D | Coarse | 30 | 235 | 25–65 | 210–530 | 220 | 25 |
| SJ.1400Z-D | Medium | 30 | 215 | 22–50 | 200–500 | 220 | 25 |
| SJ.1650C2-D | Coarse | 34 | 300 | 31–65 | 280–610 | 250 | 35 |
| SJ.1650C-D | Coarse | 34 | 260 | 25–65 | 265–580 | 250 | 35 |
| SJ.1650Z-D | Medium | 34 | 240 | 19–50 | 240–550 | 250 | 35 |
C = coarse cavity, Z = medium cavity, C2 = extra-coarse cavity. Capacities are open-circuit on medium-hard rock.
Configuration & options
Cavity
Coarse, medium or extra-coarse springs and liners, fixed at order.
Drive
Motor supplied for your voltage and frequency; belt or direct drive according to model.
Wear parts
Mn13Cr2 standard; high-chrome liners for abrasive feed.
Tropical package
Anti-rust treatment, sealed electricals, high-ambient bearing clearances.
Spares kit
Recommended one-year wear and consumable kit shipped with the machine, so commissioning does not stop for a $40 part.
How to choose the right model
- Buy the spring cone when service access and electrical quality are your real constraints. It is not the most modern machine in the range; it is the one that keeps producing where modernity has nothing to plug into.
- Check the stroke: the 1650 models run a longer stroke and are the right choice for coarse, hard feed; the 1200 is a genuine 110–250 t/h machine and is often over-specified by buyers chasing a bigger number.
- If you are planning to add a sand stage later, buy the cone for your secondary duty and plan the VSI as a separate decision — do not try to make one machine do both jobs.
Delivery & service commitments
| Item | Commitment |
|---|---|
| Standard machine lead time | 60 days from order confirmation |
| Annual production capacity / monthly shipments | 1,000 units per year · 100 units per month (all ranges) |
| Spare parts supply | Within 2 months worst case; typically far faster for models in current production |
| Engineer attendance on site | Within 10 days of the requirement being agreed, for export markets |
| Remote support | Response within one working day; included, not charged |
| Warranty | Terms stated in the contract in the same words published on this site |
| Installation & commissioning | Guidance and supervision by our engineers, through to acceptance at rated capacity |
| Buyer provides | Site civil works, electrical installation and site access — drawings and answers supplied |
We supply the machines, the drawings, the commissioning support and the parts. We do not operate your plant after handover.
Common questions
Why would I buy a spring cone instead of a hydraulic one?
Two reasons, both practical: cost, and the absence of an oil/hydraulic subsystem in a place where nobody can service one. We sell both, so we will tell you which your site actually needs — including when the answer is the cheaper machine.
Is the spring cone obsolete?
It is old, not obsolete. It is still specified on contractor and remote-region plants worldwide because the failure mode is benign: springs compress and the machine continues. A hydraulic machine with a failed oil station stops the whole line.
How do I adjust the discharge setting?
Mechanically, with the adjustment ring — the procedure is in the O&M manual and covered in the operator training we deliver at commissioning. It is slower than hydraulic adjustment, which is the honest trade-off.