Quick couplers · S-System (Scandinavian)
QC-S - S-System Scandinavian quick-coupler
- For machines of 0.5–70 t
- We usually reply within 1 working day
- We check the fit before we send the quote
- 12 months warranty on manufacturing defects
- Every offer names the dispatch week
- If a bracket we made is wrong and does not fit your machine, we replace it.
Call +48 503 808 636Message us on WhatsAppPhotos and voice notes are welcome.
Standard
S-System Symmetrical Scandinavian quick-couplers
The whole range: Excavator quick couplers
- 0.5–70 tons
S-System reversible Scandinavian quick-couplers built to the Nordic S standard, in fully hydraulic automatic, mechanically operated semi-automatic and hydraulic tilt/swivel versions. The range runs from QC-S30 for 0.5–2 t carriers to QC-S90 for 40–70 t machines, and the tilt/swivel QC-U-S models add 2 × 90° of hydraulic movement.
About this family
Hydraulic, fully automatic excavator quick coupler compatible with S Nordic system. Designed and built to EN 474-5 and ISO 13031:2016/Amd 1:2025. Rear mechanical safety lock and a hydraulic safety feature with pilot operated check valve. Visual indicator of engagement included.
The manual S-System quick-coupler is mechanically operated and semi-automatic. It lets you change attachments quickly and safely, with little time lost.
Built to EN 474-5 and ISO 13031:2016/Amd 1:2025: double profiled front hook, rear mechanical safety lock, a pilot operated check valve as a second hydraulic lock, and a visual indicator of engagement. On the hydraulic versions the check valve keeps the lock closed if hydraulic pressure drops, so the attachment cannot come loose. Optional lifting hook. Dimensions, carrier class and mass for every model are in the table below, as printed in the Quick-Coupler-Systems catalogue.
Features
- Automatic, semi-automatic (manual open), and swiveling versions available
- Quick-hitches made according to Nordic S standard
- Reversible
- Safety features (double profiled front hook, visual indicator of engagement, rear mechanical lock)
- Lightweight construction
- Optional lifting hook
Automatic: hydraulic S-System quick-couplers coupled and released from the cab
- Fully hydraulic: coupling and release are worked from the cab.
- Safety: a double profiled front hook, a visual indicator of engagement and a mechanical safety lock guard against accidental release
- The S standard is the coupler interface used in the Nordic countries
Manual: semi-automatic S-System quick-couplers engaged by hand
- Semi-automatic mechanism: the coupler is engaged by hand.
- Safety indicator: the operator can see when the coupler is engaged
Tilt/Swivel: S-System quick-coupler with 2 × 90° of movement, fully automatic or semi-automatic
- Movement: Tilts and swivels the attachment into its working position.
- Hydraulic operation: 2 × 90° of movement, both ways, 180° in total
- All couplers (mechanical & hydraulic) available with tilt motor
- Hydraulic line routing: the hoses are kept out of the way of the work
- Safety: a double profiled front hook, a rear mechanical lock and a visual indicator of engagement hold the attachment.
Dimensions
Dimensions in mm Dimensions in mm
Which coupler is on your machine?
Pick the system on your machine and we put it in your enquiry. We check the bracket before we send the quote.
How to measure your coupler
Not sure which system it is? Three measurements tell us which bracket you need.
- Measure the diameter of both pins.
- Measure the distance between the pin centres.
- Measure the width between the inside faces of the ears.
If the coupler has a make or type printed on it, send that too.
Safety
- Attachment not fully engaged
- A visual indicator shows the operator whether the coupler has engaged.
- Loss of hydraulic pressure
- On hydraulic models, a pilot operated check valve works as a further hydraulic lock on the coupler.
- Accidental release
- The double profiled front hook holds the front pin of the attachment.
- The rear mechanical safety lock keeps the coupler engaged.
UK market: semi-automatic couplers are not supplied to the UK. Under an industry agreement with the HSE in force since 1 October 2008, UK buyers get the automatic or the manual version only. Confirm the version with our engineers when you ask for a quote.
- Loading machines…
Models and specifications
Figures as printed on this family’s datasheet. A dash means the datasheet does not state that figure.
Datasheet (PDF)- Which bracket does your machine take? See the coupler fit reference
- Looking for your machine by make and model? See the machine fit tables
| Model | Operation | Machine class [t] | A [mm] | B [mm] | C [mm] | D [mm] | E [mm] | F [mm] | Weight [kg] | Tilt size | Holding torque [Nm] | Working pressure [bar] | Tilt angle [°] | Get a price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| QC-S30-H/150 | Automatic | 0.5–2 | 200 | 148 | 30 | – | – | – | 15 | – | – | – | – | Get a price |
| QC-S30-H/180 | Automatic | 0.5–2 | 230 | 178 | 30 | – | – | – | 16 | – | – | – | – | Get a price |
| QC-S40-H | Automatic | 2–6 | 300 | 198 | 40 | – | – | – | 30 | – | – | – | – | Get a price |
| QC-S40-H/240 | Automatic | 2–6 | 300 | 238 | 40 | – | – | – | 32 | – | – | – | – | Get a price |
| QC-S45-H | Automatic | 5–12 | 430 | 288 | 45 | – | – | – | 70 | – | – | – | – | Get a price |
| QC-S50 | Automatic / Manual | 5–12 | 430 | 268 | 50 | – | – | – | 90 | – | – | – | – | Get a price |
| QC-S60 | Automatic / Manual | 12–20 | 480 | 338 | 60 | – | – | – | 115 | – | – | – | – | Get a price |
| QC-S70 | Automatic / Manual | 18–33 | 600 | 448 | 70 | – | – | – | 270 | – | – | – | – | Get a price |
| QC-S80 | Automatic / Manual | 30–34 | 670 | 588 | 80 | – | – | – | 350 | – | – | – | – | Get a price |
| QC-S90 | Automatic | 40–70 | 750 | 748 | 90 | – | – | – | 750 | – | – | – | – | Get a price |
| QC-S30-SA/150 | Manual | 0.5–2 | 200 | 148 | 30 | – | – | – | 15 | – | – | – | – | Get a price |
| QC-S30-SA/180 | Manual | 0.5–2 | 230 | 178 | 30 | – | – | – | 16 | – | – | – | – | Get a price |
| QC-S40-SA | Manual | 2–6 | 300 | 198 | 40 | – | – | – | 30 | – | – | – | – | Get a price |
| QC-S40-SA/240 | Manual | 2–6 | 300 | 238 | 40 | – | – | – | 32 | – | – | – | – | Get a price |
| QC-S45-SA | Manual | 5–12 | 430 | 288 | 45 | – | – | – | 70 | – | – | – | – | Get a price |
| QC-U-S30-H/150 | Tilt / swivel | 0.5–2 | 200 | 148 | 30 | 280 | 215 | 317 | 41 | 100 | 2.4 | 210 | 180 | Get a price |
| QC-U-S30-H/180 | Tilt / swivel | 0.5–2 | 230 | 178 | 30 | 280 | 258 | 365 | 42 | 100 | 2.4 | 210 | 180 | Get a price |
| QC-U-S40-H | Tilt / swivel | 2–6 | 300 | 198 | 40 | 370 | 287 | 475 | 90 | 125 | 8.2 | 210 | 180 | Get a price |
| QC-U-S40-H/240 | Tilt / swivel | 2–6 | 300 | 238 | 40 | 370 | 345 | 475 | 92 | 125 | 8.2 | 210 | 180 | Get a price |
| QC-U-S45-H | Tilt / swivel | 5–12 | 430 | 288 | 45 | 420 | 417 | 682 | 212 | 200 | 24.0 | 210 | 180 | Get a price |
| QC-U-S50 | Tilt / swivel | 5–12 | 430 | 268 | 50 | 460 | 388 | 682 | 232 | 200 | 24.0 | 210 | 180 | Get a price |
| QC-U-S60 | Tilt / swivel | 12–20 | 480 | 338 | 60 | 550 | 490 | 760 | 317/351 | 250 | 40.0 | 250 | 100/140 | Get a price |
| QC-U-S70 | Tilt / swivel | 18–33 | 600 | 448 | 70 | 650 | 650 | 950 | 635/692 | 290 | 80.0 | 250 | 100/140 | Get a price |
| QC-U-S80 | Tilt / swivel | 30–34 | 670 | 588 | 80 | 740 | 852 | 1060 | 715/772 | 290 | 80.0 | 250 | 100/140 | Get a price |
→ Scroll the table sideways to see every model.
– = not specified for this size
Compliance, certification & documentation
- EN ISO 3834-2Certified welding qualityCSW/1293/2025
- EN 1090-1 EXC1 + EXC2Factory production control1433-CPR-0257
- EN ISO 9606-1 · WPQR EN ISO 15614Qualified welders and procedures
- EN ISO 9712: VT + PT level 2Non-destructive testingwhere the drawing or inspection plan requires it
- EN 10204 3.1Material traceability
- CE: 2006/42/ECCE markingTransition to Regulation (EU) 2023/1230 underway. Applicable from 20 January 2027.
Warranty
12 months warranty on manufacturing defects in the components Sieruta makes itself.
Normal wear, misuse or overloading and unauthorised modifications are not covered. Warranty terms and claims
Why buy from the factory
- Cutting, machining, welding and painting on one site, our own factory in Poland, EU
- More than 50,000 attachments delivered since 2008
- A record for every serial number, so the spare parts match your attachment
Request a quote
Tell us your machine and the job. An engineer checks the fit, and we usually reply within 1 working day.