Airtac SCD Standard Cylinder SCD40X220S
The AirTAC Airtac SCD Standard Cylinder SCD40X220S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø16mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø40mm bore, 220mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke220 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD40X220S
The SCD40X220S delivers identical force in both directions—528 N at 0.7 MPa—because the 16 mm rod passes through both end caps, removing the area difference that creates asymmetric thrust on a single-rod cylinder. With a 220 mm stroke and a built-in magnet, it is ready for CMSG/DMSG/EMSG sensors clamped directly to the tie-rod barrel, giving you clean end-of-stroke or mid-position sensing without extra brackets.
This model uses PT1/4 ports and an M12x1.25 rod thread on both ends. The adjustable air cushion (21 mm) decelerates the piston smoothly at each end, and the body length A(SCD) is 191 mm. Operating pressure spans 0.15–1.0 MPa, with a proof pressure of 1.5 MPa, making it a robust double-rod actuator for tasks that need a rear rod for tooling or a sensor flag.
Airtac SCD Standard Cylinder SCD40X220S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD40X220S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 220 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø40mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 528 N | 528 N |
| 0.7 MPa | 739 N | 739 N |
| Max (@1.0 MPa) | 108 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 SCD40X220S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×220 | 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 SCD40X220S Is Used
Two-Sided Transfer Shuttle
The through-rod lets you mount a tooling plate on the front and a counterbalance or secondary pusher on the rear, creating a balanced shuttle that moves workpieces between two stations with equal speed and force in both directions.
Sensor-Flag Actuation
With the built-in -S magnet, CMSG or DMSG sensors detect piston position directly. Use the rear rod extension to carry a physical flag or cam that trips an external limit switch for redundant end-of-stroke confirmation.
Non-Rotating Alignment Pusher
The dual-rod support naturally resists rotation better than a single rod. Use it to push components into a fixture where even slight twisting would cause misalignment, without needing an external guide for light-duty centering tasks.
Is the Airtac SCD Standard Cylinder SCD40X220S the Right Cylinder?
Choose the SCD40X220S when you need a compact double-rod cylinder with integrated position sensing. If your load demands more force, stepping up to the 50 mm bore provides 825 N at 0.5 MPa—a useful jump without a large increase in body length. For purely single-sided actuation where a rear rod adds no value, the single-rod SC series is a lighter, more economical alternative.
This double-rod design improves rod guidance compared to a single-rod cylinder, but it is not a substitute for a guided cylinder under genuine side load. A direct replacement must match the 40 mm bore, 220 mm stroke, PT1/4 ports, basic mounting, and the -S magnet option. The sensor-ready barrel means you can swap in an identical SCD40X220S and immediately re-attach your existing magnetic switches.
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 SCD40X220S FAQ
Because the 16 mm rod occupies both piston sides, push and pull forces are equal. At 0.5 MPa you get 528 N, at 0.7 MPa it is 739 N, and at the maximum operating pressure of 0.9 MPa the thrust reaches 950 N. The theoretical force at 1.0 MPa is 108 kgf.
Choose the SCD when you need identical force and speed in both directions, or when the rear rod provides a mechanical advantage—mounting a sensor flag, a rear tool, or a stroke adjustment stop. The dual-rod bearing arrangement also offers better guidance and anti-rotation performance than a single-rod cylinder of the same bore.
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