Airtac SCD Standard Cylinder SCD100X250SFA
The AirTAC Airtac SCD Standard Cylinder SCD100X250SFA 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, 250mm stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Rod (both ends)Ø25 mm
- Stroke250 mm
- Port sizePT1/2
- Rod configDouble rod (through)
- CushionAdjustable, 29 mm
About the Airtac SCD Standard Cylinder SCD100X250SFA
This SCD100X250SFA double-rod pneumatic cylinder provides a symmetrical 3681 N of force in both directions at 0.5 MPa, thanks to its through-rod design where the 25 mm rod extends from both end caps. The equal push/pull output eliminates force differentials, making it ideal for applications where a tool or sensor flag must be mounted on the rear rod, or where the load must be driven with identical speed and thrust in each stroke direction.
Equipped with a built-in magnet (S suffix) and a front rectangular flange (FA mount, F-SC100FA), this 100 mm bore unit is ready for direct panel mounting and barrel-mounted CMSG/DMSG/EMSG position sensors. The tie-rod construction houses an adjustable air cushion (29 mm length) to decelerate the piston smoothly, and the PT3/8 ports supply the double-acting chambers. At the maximum operating pressure of 0.9 MPa, it generates a substantial 6626 N of thrust each way.
Airtac SCD Standard Cylinder SCD100X250SFA Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD100X250SFA |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø100 mm |
| Rod diameter | Ø25 mm (both ends) |
| Stroke | 250 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 SCD100X250SFA
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SCD100X250SFA Is Used
Bidirectional Shuttle Tables
The equal 3681 N push/pull force at 0.5 MPa drives a transfer shuttle with identical acceleration and deceleration in both directions, ensuring consistent cycle times. The rear rod can carry a counterbalance or secondary tooling plate.
Rear-Mounted Stroke Sensing
With the built-in magnet and a rear rod extension, mount a DMSG sensor on the barrel for mid-stroke confirmation while using the rear rod tip to trigger an external limit switch, providing redundant position verification for press-fed tooling.
Dual-Sided Assembly Fixtures
Mount a nest on the front rod and a pressure pad on the rear rod to clamp a part from both sides simultaneously. The through-rod's anti-rotation characteristic helps maintain fixture alignment without a separate guide shaft.
Is the Airtac SCD Standard Cylinder SCD100X250SFA the Right Cylinder?
Choose the SCD100X250SFA when your mechanism requires equal bidirectional force and a stroke of 250 mm. If you need a higher thrust, stepping up to the 125 mm bore provides 5734 N at 0.5 MPa, while the 80 mm bore offers 2268 N for lighter, more compact assemblies. The double-rod design offers better guidance than a single-rod SC cylinder, but for significant side loads, a dedicated guided cylinder is still the correct choice.
This model is a direct replacement for another AirTAC SCD100 double-rod cylinder matching the 250 mm stroke, PT port thread, front flange mounting, and integrated magnet. For strokes of 300 mm or longer, always evaluate the unsupported rod length under compressive loading to prevent bending; an external guide rail may be required.
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 SCD100X250SFA FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it outputs 3681 N, at 0.7 MPa it outputs 5153 N, and at the maximum operating pressure of 0.9 MPa it reaches 6626 N in both directions.
Select the SCD when you need equal force and speed in both directions, or when you require a rear rod extension to mount tooling, a stopper bolt, or a sensor cam. The through-rod also provides better support for the piston, reducing uneven seal wear compared to a single-rod cylinder in high-cycle applications.
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