Airtac SGC Standard Cylinder SGC250X680
The AirTAC Airtac SGC Standard Cylinder SGC250X680 is a genuine double acting ISO 15552 (orig. ISO 6431) tie-rod air cylinder with a Ø250mm bore and 680mm stroke, G1 air ports and adjustable end cushioning. Its large-bore tie-rod build delivers high thrust and drops into standardized ISO 15552 mounting on heavy automation.
- BoreØ250 mm
- Stroke680 mm
- Port sizeG1
- Acting typeDouble acting
- Rod threadM42×2.0
- CushionAdjustable, 60 mm
About the Airtac SGC Standard Cylinder SGC250X680
Delivering 24543 N of push force at 0.5 MPa, this double-acting ISO 15552 tie-rod cylinder is built for heavy-duty automation. Four steel tie rods clamp the aluminum barrel to the front and rear covers, providing the high rigidity needed to handle massive thrust loads without flexing. The two-way piston seal incorporates an oil reservoir to ensure long-term lubrication and seal life. Because this is a large 250 mm bore, TPU seals are not available; instead, the front-cover packing and buffer gasket utilize NBR, with a Viton H option for high-temperature environments up to 150 C.
For real-world sizing, plan for about 14726 N of actual work at 0.5 MPa, which safely lifts roughly 1251 kg vertically with a 2:1 margin. The 680 mm stroke operates at speeds of 30-500 mm/s, and the G1 air port supplies the volume required for rapid large-bore actuation. Note that this specific SKU lacks a magnet, so it cannot host CMSG, DMSG, or EMSG magnetic switches without upgrading to the -S variant.
Airtac SGC Standard Cylinder SGC250X680 Technical Specifications
| Model | Airtac SGC Standard Cylinder SGC250X680 |
|---|---|
| Series | SGC ISO 15552 tie-rod cylinder |
| Bore size | Ø250 mm |
| Stroke | 680 mm |
| Acting type | Double acting |
| Port size | G1 |
| Rod thread | M42×2.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 60 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SGC datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Thread options: PT (blank) / G. TPU seals are not available for the Ø250 bore (NBR / Viton only).
Theoretical Output Force (Ø250mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 24544 N | 23562 N |
| 0.7 MPa | 34361 N | — |
| Max (@1.0 MPa) | 5006 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SGC Standard Cylinder SGC250X680
| SGC | ISO 15552 tie-rod cylinder (double-acting type). |
|---|---|
| 250 | Bore size in mm (125 / 160 / 200 / 250). |
| ×680 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
SGC-family variants: SGC (double acting), SGCD (double rod), SGCJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / FTC / TCM1 / TCM2. Seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SGC Standard Cylinder SGC250X680 Is Used
Heavy Press Stamping
Drives large forming presses requiring 24543 N of push force at 0.5 MPa to deform thick steel plates.
Palletizing Robot Actuator
Extends 680 mm to push heavy freight pallets onto accumulation conveyors in distribution hubs.
Injection Mold Ejection
Provides the massive 5006 kgf theoretical peak force needed to break large automotive molds free during ejection.
Is the Airtac SGC Standard Cylinder SGC250X680 the Right Cylinder?
When sizing this 250 mm bore actuator, the next smaller option in the SGC family is the 200 mm bore, which provides 15708 N of push force at 0.5 MPa. Since 250 mm is the largest bore available in this series, exceeding the 5006 kgf theoretical maximum at 1.0 MPa requires moving to a multi-cylinder or non-standard setup. The 680 mm stroke demands careful mechanical integration; always use external guides to prevent rod bending and side-loading damage during long extensions.
This model has no internal magnet, meaning direct position sensing is impossible unless you select the -S version. Furthermore, the adjustable 60 mm air cushions only decelerate the piston near the end caps and do not function as a brake. If the machinery must hold a vertical load when air pressure drops or the valve is centered, you must install an external rod lock or a pilot-operated check valve to prevent drifting.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Long-stroke side load — support the rod end
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load; support long strokes at the rod end.
- check Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/CR/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SGC Standard Cylinder SGC250X680 FAQ
At 0.5 MPa, the push force is 24543 N and the pull force is 23562 N. At 0.7 MPa, push is 34360 N and pull is 32986 N. The theoretical maximum force is 5006 kgf at 1.0 MPa. The air port size is G1, and the rod-end thread is M42x2.0.
This SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG switches; you need the -S variant for sensing. Additionally, the air cushions only decelerate the piston at stroke ends and do not lock the load. You must add an external rod lock or pilot-operated check valve to hold a load safely.
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