The SK.D is a multi-cylinder hydraulic cone: the crushing force is carried by a ring of hydraulic cylinders around the bowl, and the same cylinders provide overload protection, cavity clearing and discharge-setting adjustment. In practice that means a plant manager can shift the setting in minutes, and an uncrushable lump passes instead of breaking something expensive.
The reason we publish twelve rows instead of four is that a cone is defined by its cavity, not by its nominal size. A fine cavity on an 1800 platform and a coarse cavity on the same platform are different machines with different feed envelopes. Buyers who compare "an 1800 cone" between suppliers without checking the cavity are comparing nothing.
Typical duty: secondary after a jaw, or tertiary/quadrinary producing 0–20 mm aggregate and concrete-grade manufactured sand. Paired with an SJ.E.90.12 primary, an SK.D.1500 tertiary arrangement is the most common 300–500 t/h configuration we ship to West Africa.
Product and workshop photographs from our own production lines — Hangzhou, Weihai and Wuhu.
Design & working principle
- Full hydraulic adjustment and clearing — setting changes and cavity clearing from the control panel, no manual shimming.
- Overload protection by cylinder relief — tramp metal passes through the cavity instead of stalling the drive or shearing a shaft.
- Interchangeable cavity liners — coarse, medium and fine liners on the same platform, so a gradation change is a liner change rather than a new machine.
- Labyrinth seal with positive-pressure dust exclusion — important in dry, dusty African quarry conditions where grease seals fail early.
- Thin-oil lubrication with temperature and flow monitoring — the interlock stops the machine before a dry bearing becomes a failed eccentric.
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 | Closed-side feed opening (mm) | Min. discharge setting (mm) | Capacity (t/h) | Motor power (kW) | Main unit weight (t) |
|---|---|---|---|---|---|---|
| SK.D.1200 | Fine | 105 | 13 | 145–260 | 220 | 20 |
| SK.D.1200 | Medium | 150 | 16 | 175–280 | 220 | 20 |
| SK.D.1200 | Coarse | 210 | 19 | 190–380 | 220 | 20 |
| SK.D.1400 | Fine | 110 | 13 | 180–340 | 315 | 27 |
| SK.D.1400 | Medium | 200 | 20 | 240–370 | 315 | 27 |
| SK.D.1400 | Coarse | 250 | 25 | 280–430 | 315 | 27 |
| SK.D.1500 | Fine | 135 | 16 | 270–530 | 400 | 38 |
| SK.D.1500 | Medium | 210 | 22 | 335–600 | 400 | 38 |
| SK.D.1500 | Coarse | 286 | 30 | 395–680 | 400 | 38 |
| SK.D.1800 | Fine | 220 | 16 | 395–680 | 630 | 76 |
| SK.D.1800 | Medium | 265 | 25 | 480–920 | 630 | 76 |
| SK.D.1800 | Coarse | 300 | 32 | 530–1,000 | 630 | 76 |
Feed opening is the closed-side dimension. Capacities are open-circuit on medium-hard rock; closed-circuit tertiary duty producing 0–20 mm typically runs 15–25% below the open-circuit figure.
Configuration & options
Cavity
Coarse / medium / fine liners selectable at order — tell us your feed gradation and target product and we will specify the cavity, not leave it to you.
Automation
PLC control cabinet with setting display and overload logging; optional automatic setting regulation on the 1500/1800 platforms.
Lubrication
Thin-oil station with dual pumps and temperature interlocks. Air-cooled or water-cooled cooler depending on ambient temperature.
Drive
Motor sized to your actual duty cycle — a machine run at 50% load does not need the full-power motor, and we will price it accordingly.
Tropical package
High-ambient cooling, IP-rated electricals, anti-rust treatment, and rain covers for the lubrication station.
How to choose the right model
- Define the cavity first from your feed gradation. If more than 10% of the feed is smaller than the discharge setting, you will generate excessive fines and wear the liners unevenly — go finer, or screen the fines out first.
- Then confirm the reduction ratio is achievable: a single cone passes roughly 3–4:1. If you need more, plan a two-stage cone arrangement rather than over-stressing one machine.
- Match the motor to the duty, not the model. This is where we usually save buyers money on a real quotation, and it is the question most suppliers avoid.
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
Multi-cylinder or single-cylinder — which should I buy?
It depends on your duty, not on which is newer. Multi-cylinder SK.D gives finer discharge control and better cavity flexibility, and is the right choice for tertiary work and manufactured sand. Single-cylinder SK.Y is a simpler hydraulic system with fewer cylinders to maintain, and is often the better value for coarse/medium secondary duty on high-tonnage plants. Tell us the duty and we will recommend one, including when the cheaper machine is good enough.
Can I change from medium to fine duty later?
Yes — the cavity liners are interchangeable on the same platform. The bowl and adjustment range stay the same; you change liners and update the setting. Many clients buy a medium cavity and order a fine liner set with the first spare-parts order.
What does the hydraulic system need on site?
A clean oil supply, a level foundation and a stable electrical supply for the lubrication station. On genset-powered or weak-grid sites we specify a soft-start arrangement specifically so the oil pump establishes flow before the crusher starts.