Airtac SCD Standard Cylinder SCD100X25
The AirTAC Airtac SCD Standard Cylinder SCD100X25 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. Ø100mm bore, 25mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke25 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac SCD Standard Cylinder SCD100X25
The SCD100X25 is a double-acting, double-rod pneumatic cylinder that outputs identical force in both directions—3681 N at 0.5 MPa—because the 25 mm rod passes through both end caps. This symmetric thrust makes it ideal for short-stroke, two-sided tooling where a rear rod extension is needed for a stopper or sensor flag.
With a 25 mm stroke and a body length A(SCD) of 263 mm, the cylinder provides a compact yet rigid package. The adjustable air cushion (29 mm) decelerates the piston smoothly at each end, and the PT1/2 ports supply ample flow for the 100 mm bore, keeping cycle times consistent in both extend and retract.
Airtac SCD Standard Cylinder SCD100X25 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD100X25 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 25 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/2 |
| 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, 29 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 (Ø100mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3682 N | 3682 N |
| 0.7 MPa | 5154 N | 5154 N |
| Max (@1.0 MPa) | 751 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 SCD100X25
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×25 | 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 SCD100X25 Is Used
Two-Sided Actuation
Operates a tool or clamp from both ends of the cylinder simultaneously, using the front rod for the main task and the rear rod to trigger a limit switch or drive a secondary linkage.
Non-Rotating Short Pusher
The dual-rod construction provides inherent anti-rotation stability for short-stroke pushing and ejecting, keeping the tooling aligned without needing an external guide for light, on-axis loads.
Miniature Transfer Gate
Acts as a compact, bidirectional stop gate on a conveyor line, where the rear rod can mount a counterweight or a visual position indicator for the operator.
Is the Airtac SCD Standard Cylinder SCD100X25 the Right Cylinder?
This 100 mm bore unit suits applications needing around 3681 N of balanced force. If your load requires less thrust, stepping down to an SCD80 (2268 N at 0.5 MPa) can reduce air consumption and physical size. For purely single-sided actuation, a single-rod SC series cylinder is a more economical choice, as the double-rod design is specifically for tasks that exploit the through-rod.
When replacing an existing SCD100X25, match the bore, 25 mm stroke, PT port thread, and the basic mounting configuration exactly. For strokes of 300 mm or more on this bore, the long unsupported rod can experience bending under side load; an external guide rail or a switch to a guided cylinder is recommended to protect the rod bearings.
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 SCD100X25 FAQ
The push and pull forces are identical because it is a double-rod cylinder. At 0.5 MPa, both directions produce 3681 N. At the maximum operating pressure of 0.9 MPa, the force is 6626 N in both extend and retract.
Choose the SCD when you need equal force and speed in both directions, or when you require a rear rod extension to mount a sensor flag, stopper, or secondary tooling. The through-rod also provides better guidance and bending resistance than a single-rod cylinder of the same bore, though it is not a substitute for a fully guided cylinder under high side loads.
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