A jaw crusher is the least forgiving machine in a crushing line: it takes the blasting rock nobody has sized for it yet, and everything downstream inherits whatever it produces. That is why we build the SJ.E around stiffness rather than headline throughput — a rigid frame, a large-radius swing jaw motion, and tooth geometry that grips slabby granite instead of riding up on it.
SJ.E units are used as primary crushers in aggregate plants, manufactured-sand lines, metal-ore crushing circuits and construction & demolition waste plants. They are equally at home behind a vibrating grizzly feeder on a 100 t/h road contractor's plant and in front of a 1,000 t/h quarry line feeding an SK.D cone.
Where it hurts most in the field: oversize boulders bridging the feed opening, and wear plates that wear unevenly because the feed is not centred. Both are solved in the layout, not on the machine — which is why we ask for your feed gradation and dump height before quoting a model.
Product and workshop photographs from our own production lines — Hangzhou, Weihai and Wuhu.
Design & working principle
- Cast steel frame with ribbed side walls — absorbs impact loads from uncrushable tramp material instead of cracking at the corners.
- Forged eccentric shaft, machined in-house — the single most loaded part in the machine, and the reason we keep machining inside our own workshops.
- Tooth-profile jaw plates — available in standard and heavy-duty profiles; the corrugated pattern keeps coarse slabs from slipping during the stroke.
- Hydraulic or shim discharge adjustment — setting changes without pulling the machine apart, so a gradation change does not cost you a production day.
- Grease or oil lubrication options — grease for remote sites with limited maintenance discipline, oil for continuous high-duty plants.
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 | Feed opening L×W (mm) | Max feed size (mm) | Discharge setting (mm) | Eccentric speed (r/min) | Capacity (t/h) | Motor power (kW) | Weight (t) |
|---|---|---|---|---|---|---|---|
| SJ.E.50.90 | 500×900 | ≤400 | 60–150 | 250 | 50–150 | 75 | 19 |
| SJ.E.75.10 | 750×1,060 | ≤630 | 80–140 | 256.5 | 160–300 | 160 | 28 |
| SJ.E.90.12 | 900×1,200 | ≤750 | 95–200 | 222 | 250–500 | 185 | 43 |
| SJ.E.13.16 | 1,300×1,600 | ≤1,100 | 150–300 | 190 | 800–1,200 | 315 | 100 |
Capacities are for open-circuit operation on medium-hard rock of average bulk density. Your tonnage depends on feed gradation, work index and discharge setting — send us a sieve analysis and we will size the model properly.
Configuration & options
Drive & power
Motor wound for your supply — 380/415 V 50 Hz, 220–240 V 50 Hz, or 60 Hz for the Philippines. Soft-start or VFD drive for weak-grid and genset sites.
Feed arrangement
Vibrating grizzly feeder with or without a bypass chute, dump hopper, or direct truck-dump. We size the feeder to the crusher, not the other way round.
Jaw plates
Standard Mn13Cr2 or heavy-duty high-chrome for abrasive river gravel and basalt. We will tell you which is worth the extra cost for your rock.
Discharge adjustment
Hydraulic adjustment cylinder recommended when you switch product sizes more than twice a year.
Climate & site
Tropical package: IP-rated electricals, sealed bearings, anti-rust coating on the frame and structural interfaces.
How to choose the right model
- Start from the largest lump in your feed, not your target tonnage. The feed opening should be at least 1.1× the largest lump — otherwise you get bridging and a machine that stops every second truck.
- Then look at the reduction ratio you need. If your target product is 0–40 mm from a 700 mm feed, a single jaw will not do it; you need a jaw plus a cone, and the jaw should be set as coarse as your downstream cone allows.
- Only then match the capacity column. Choosing by tonnage first is how buyers end up with a machine that is nominally big enough and hydraulically overwhelmed.
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
What is the smallest line worth putting an SJ.E into?
Around 50 t/h with the SJ.E.50.90. Below that, a mobile or compact jaw is usually a better commercial decision, and we will say so rather than sell you a bigger machine than the job supports.
Can the jaw crusher handle wet, sticky feed?
Up to a point. Sticky clay reduces the effective opening and can pack the discharge. For tropical rainy-season feed we normally specify a wider setting, a steeply angled feeder and, where the clay content is high, a pre-scalping screen. Send us a photo of the feed and we will tell you honestly whether a jaw is the right primary.
How long does a set of jaw plates last?
On medium-hard limestone, commonly 800–1,500 operating hours per set; on abrasive river gravel or basalt, noticeably less. We quote wear parts per set and keep the standard profiles in stock — see the spare-parts page for supply times.