Airtac SCD Standard Cylinder SCD40X50S
The AirTAC Airtac SCD Standard Cylinder SCD40X50S 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, 50mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke50 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD40X50S
The SCD40X50S is a double-acting, double-rod pneumatic cylinder that delivers perfectly symmetrical force in both directions, outputting 528 N at 0.7 MPa. Its through-rod design, featuring a 16 mm rod extending from both ends, eliminates the force imbalance of a single-rod cylinder, making it ideal for applications requiring identical push and pull strokes. The built-in magnet allows for direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for contactless position feedback.
With a compact 50 mm stroke and a body length A of 191 mm, this cylinder is well-suited for short, reciprocating tasks in tight spaces. The adjustable air cushion at each end, with a 21 mm cushion length, decelerates the piston smoothly to reduce end-of-stroke impact. Operating on 40-micron filtered air from 0.15 to 1.0 MPa, it provides a reliable 950 N of thrust at the maximum operating pressure of 0.9 MPa.
Airtac SCD Standard Cylinder SCD40X50S Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD40X50S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 50 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 SCD40X50S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 SCD40X50S Is Used
Two-Sided Reciprocation
The equal push/pull force makes it perfect for driving a tool or fixture that must perform identical work in both directions, such as a bidirectional scraper or wiper.
Sensor-Ready Short Stroke
The integrated magnet (-S) and 50 mm stroke are ideal for compact pick-and-place or sorting gates where end-of-stroke confirmation is required via barrel-mounted reed switches.
Symmetric Transfer Shuttle
Use the rear rod to mount a counterbalance or a secondary sensor flag, ensuring the shuttle table moves with identical speed and force profiles in both directions.
Is the Airtac SCD Standard Cylinder SCD40X50S the Right Cylinder?
Select the SCD40X50S when you need equal push and pull force in a compact envelope. If your load requires more force, stepping up to the 50 mm bore SCD50 series provides 825 N at 0.5 MPa. For applications with a significant side load, a through-rod design offers better guidance than a single-rod cylinder, but a dedicated guided cylinder is the correct choice for high moment loads. This model is a direct dimensional and functional replacement for any AirTAC SCD40X50S cylinder with the same PT port thread and 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 SCD40X50S FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it provides 528 N, at 0.7 MPa it provides 739 N, and at the maximum operating pressure of 0.9 MPa it provides 950 N of force in both directions.
Choose the SCD when your application requires identical force and speed in both directions, or when you need a rear rod extension to mount tooling, a mechanical stop, or a position-sensing flag. The through-rod also provides better bearing support and inherent anti-rotation compared to a single-rod cylinder.
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