Airtac SCD Standard Cylinder SCD125X80S
The AirTAC Airtac SCD Standard Cylinder SCD125X80S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø32mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø125mm bore, 80mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ125 mm
- Rod (both ends)Ø32 mm
- Stroke80 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 28 mm
About the Airtac SCD Standard Cylinder SCD125X80S
The SCD125X80S is a double-acting, double-rod pneumatic cylinder delivering identical force in both directions—5734 N at 0.5 MPa. With a 125 mm bore and 80 mm stroke, its 32 mm rod passes through both end caps, providing a rear connection point for cams, stoppers, or external sensors without needing a separate bracket. The built-in magnet (denoted by the -S suffix) allows direct mounting of CMSG or DMSG reed switches along the tie-rod barrel for clean, reliable end-of-stroke detection.
This model falls into the ISO 6430 class for larger bore cylinders, with a speed range of 30-500 mm/s. The adjustable air cushion at each end is 28 mm long, decelerating the piston smoothly to reduce impact noise. The body length A(SCD) is 291 mm, making it longer than a single-rod SC of the same stroke. Ports are PT1/2, and the rod thread is M27x2, suitable for robust tooling attachment on both sides.
Airtac SCD Standard Cylinder SCD125X80S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD125X80S |
|---|---|
| Series | SCD double-rod tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø125 mm |
| Rod diameter | Ø32 mm (both ends) |
| Stroke | 80 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| Rod thread | M27×2 |
| 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, 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 (Ø125mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | 8027 N |
| Max (@1.0 MPa) | 1169 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 SCD125X80S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SCD125X80S Is Used
Two-Sided Transfer Shuttles
The through-rod design allows a tooling plate on each end, making it perfect for shuttling parts between two parallel conveyors with equal speed and force in both directions.
Rear-Mounted Stroke Sensing
With the built-in magnet, mount a CMSG sensor on the rear rod to detect piston position externally, keeping the front tooling area clear for the primary work function.
Non-Rotating Alignment Pushers
The dual-rod support provides inherent anti-rotation, useful for pushing components into a press or fixture where maintaining angular alignment is critical.
Is the Airtac SCD Standard Cylinder SCD125X80S the Right Cylinder?
Select the SCD125 when your application needs symmetric actuation force around 5734 N at 0.5 MPa. If your load requires a higher force, step up to the SCD160, which provides 9425 N at the same pressure. For lower force needs, the SCD100 at 3681 N is the next step down. This double-rod design is ideal when you need to mount tooling on both ends, but if the load creates significant side forces, a guided cylinder is a safer choice than relying solely on the dual-rod bearing support. For a direct replacement, match the 125 mm bore, 80 mm stroke, PT1/2 ports, basic mounting, and the -S magnet option.
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 SCD125X80S FAQ
The push and pull forces are identical because the rod extends from both ends. At 0.5 MPa, the force is 5734 N; at 0.7 MPa, it is 8028 N; and at the maximum operating pressure of 0.9 MPa, it reaches 10321 N.
Choose the SCD when you need to attach tooling, a stopper, or a sensor flag to the rear rod, or when you require perfectly equal force and speed in both directions. The through-rod also provides better guidance and resistance to rotation than a single-rod cylinder, though it is not a replacement for a fully guided actuator under heavy side loads.
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