Airtac SC80 Standard Cylinder SC80X681
The AirTAC Airtac SC80 Standard Cylinder SC80X681 is a genuine double-acting standard air cylinder with a Ø80mm bore and 681mm stroke, PT3/8 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ80 mm
- Stroke681 mm
- Port sizePT3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 28 mm
About the Airtac SC80 Standard Cylinder SC80X681
The SC80X681 is a double-acting pneumatic cylinder from the AirTAC SC tie-rod series, combining an 80 mm bore with a non-standard 681 mm stroke. At 0.5 MPa operating pressure it generates 2513 N of push force and 2268 N of pull force, while at the maximum 0.9 MPa it reaches 4523 N, driven by a 25 mm diameter piston rod.
This model uses the standard TPU seal with an operating temperature range of -20 to +70 °C and PT3/8 ports. The adjustable air cushion at each end (28 mm cushion length) decelerates the piston smoothly. With a body length A of 182 mm, the total extended length is approximately 863 mm. As a non-standard stroke length, this cylinder is built to order for applications needing a specific linear displacement beyond the standard 500 mm maximum.
Airtac SC80 Standard Cylinder SC80X681 Technical Specifications
| Model | Airtac SC80 Standard Cylinder SC80X681 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke | 681 mm |
| Acting type | Double acting |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (approx.) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SC80 Standard Cylinder SC80X681
| SC | Standard tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×681 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SC80 Standard Cylinder SC80X681 Is Used
Long-Stroke Product Pusher
The 681 mm stroke is ideal for diverting large packages or pallets across a wide conveyor section, using the 2513 N push force at 0.5 MPa to move heavy items reliably.
Timber Frame Press
Applies up to 4523 N of force at 0.9 MPa for pressing glued timber joints or truss plates, where the extended reach fits large assembly jigs.
Vertical Bin Gate Actuator
Operates a tall slide gate on a silo or hopper. The 25 mm rod and adjustable cushion manage the vertical mass, but an external guide is required to prevent rod buckling under off-axis loads.
Is the Airtac SC80 Standard Cylinder SC80X681 the Right Cylinder?
Select the SC80 when your application needs between roughly 2500 N and 4500 N of force. If your load is lighter, stepping down to a 63 mm bore (1559 N at 0.5 MPa) can reduce air consumption and physical size. For heavier loads, the 100 mm bore offers 3927 N at the same pressure. This 681 mm stroke is non-standard and made-to-order; verify that the long, unsupported 25 mm rod does not experience side loading that could cause bending. For strokes over 300 mm with any side force, use an external linear guide or a guided cylinder to protect the rod bearing.
For a direct replacement, match five attributes: 80 mm bore, 681 mm stroke, PT3/8 port thread, basic (no bracket) mounting, and the absence of a magnet. This ensures the mounting footprint, port location, and force output align with the existing AirTAC SC tie-rod cylinder.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
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 on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SC80 Standard Cylinder SC80X681 FAQ
At the standard 0.5 MPa operating pressure, the push force is 2513 N and the pull force is 2268 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 4523 N. The theoretical maximum force at 1.0 MPa is 513 kgf.
The 681 mm stroke is non-standard for the 80 mm bore (maximum standard stroke is 1500 mm, but 681 mm is not a listed standard increment). It is a made-to-order item. For replacement, you must match the 80 mm bore, 681 mm stroke, PT3/8 ports, and basic mounting configuration exactly.
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