Airtac SCD Standard Cylinder SCD80X300S
The AirTAC Airtac SCD Standard Cylinder SCD80X300S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø25mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø80mm bore, 300mm stroke, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Rod (both ends)Ø25 mm
- Stroke300 mm
- Port sizePT3/8
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD80X300S
The SCD80X300S provides perfectly symmetric force output in both directions, delivering 2268 N of thrust each way at 0.5 MPa thanks to its dual 25 mm diameter rods. This through-rod design eliminates the force imbalance found in single-rod cylinders, making it the go-to choice when a machine axis requires identical speed and power for the extend and retract strokes. The built-in magnet allows CMSG or DMSG sensors to clamp directly onto the tie-rod barrel for clean, external position sensing.
With a 300 mm stroke, this cylinder is well-suited for transfer shuttles and material handling where tooling can be mounted on both rod ends. The adjustable air cushion, with a 28 mm cushion length, decelerates the piston smoothly at both ends of travel, protecting end caps from impact. Its PT3/8 ports and M20x1.5 rod threads are standard across the 80 mm bore SCD family, ensuring straightforward integration with common pneumatic fittings and rod-end accessories.
Airtac SCD Standard Cylinder SCD80X300S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD80X300S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø80 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 300 mm |
| Rod configuration | Double rod — rod through both caps |
| 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 SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø80mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2268 N | 2268 N |
| 0.7 MPa | 3175 N | 3175 N |
| Max (@1.0 MPa) | 463 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCD Standard Cylinder SCD80X300S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 80 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCD Standard Cylinder SCD80X300S Is Used
Bidirectional Transfer Shuttles
The equal 2268 N push/pull force at 0.5 MPa makes this cylinder ideal for shuttling parts between two stations. The rear rod can carry a counterbalance weight or a second tooling plate, keeping the load symmetric and the motion smooth.
Sensed End-of-Stroke Detection
The integrated magnet (-S option) works with CMSG/DMSG sensors mounted on the tie rods. This provides a clean, non-contact method to confirm both extended and retracted positions, perfect for sequencing in automated assembly cells.
Dual-Sided Staking or Pressing
Use the front rod for a press tool and the rear rod for a stripper plate or ejection mechanism. The through-rod's inherent anti-rotation characteristic helps maintain tool alignment without needing an external guide for light, on-axis loads.
Is the Airtac SCD Standard Cylinder SCD80X300S the Right Cylinder?
This 80 mm bore model sits in the middle of the SCD range, offering a substantial step up from the 63 mm bore which provides 1402 N at the same pressure. If your application needs more force, the SCD100X300 delivers 3681 N, but the 80 mm bore often hits the sweet spot for speed and air consumption in medium-duty dual-sided tooling. For any stroke of 300 mm or more, be mindful of side loads on the unsupported rod ends; while the double-rod design offers better guidance than a single rod, it is not a substitute for an external guide rail or a guided cylinder if the load applies significant lateral force.
This model is a direct replacement for an existing AirTAC SCD80X300S with a PT port, basic mount, and TPU seals. To ensure a drop-in fit, match the bore, stroke, port thread, and the built-in magnet option exactly. If your current unit uses a centre trunnion mount, order SCD80X300STC instead.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCD Standard Cylinder SCD80X300S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 2268 N, at 0.7 MPa it delivers 3175 N, and at the maximum operating pressure of 0.9 MPa the force reaches 4082 N in both directions.
Choose the SCD when you need equal force and speed in both directions, or when you need to mount tooling, a sensor flag, or a mechanical stop on the rear rod. The through-rod also provides better bearing support than a single-rod cylinder, reducing rod deflection for on-axis loads, though it is not a replacement for a fully guided cylinder under heavy side loads.
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