Airtac SCD Standard Cylinder SCD40X16
The AirTAC Airtac SCD Standard Cylinder SCD40X16 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, 16mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke16 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD40X16
The SCD40X16 is a double-acting, double-rod pneumatic cylinder where the piston rod extends from both ends, providing identical push and pull force of 528 N at 0.7 MPa. This symmetry is ideal for applications needing a rear rod connection for a sensor flag, stopper bolt, or secondary tooling without changing the cylinder's output balance.
With a 16 mm rod passing through both end caps and a compact body length A(SCD) of 191 mm, this 40 mm bore model uses PT1/4 ports. The 16 mm stroke is a non-standard, made-to-order length, suited for very short, precise bidirectional actuation tasks where space is tight and force must be equal in both directions.
Airtac SCD Standard Cylinder SCD40X16 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD40X16 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 16 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 SCD40X16
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×16 | 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 SCD40X16 Is Used
Bidirectional Clamping
Equal force in both directions makes the SCD40X16 perfect for a two-sided clamp that grips a part from opposite sides with identical pressure, ensuring no distortion.
Dual-End Position Sensing
The rear rod extension provides a convenient mounting point for a sensor flag or cam, allowing end-of-stroke detection on both sides of the cylinder without complex bracketry.
Short-Stroke Shuttle
Its 16 mm stroke is ideal for a compact diverter gate or shuttle mechanism where a part is moved a precise, short distance between two positions by the through-rod.
Is the Airtac SCD Standard Cylinder SCD40X16 the Right Cylinder?
Select the SCD40X16 when your mechanism requires equal force and speed in both directions over a very short stroke. The 40 mm bore offers a balanced step up from the 32 mm bore (345 N at 0.5 MPa), providing 528 N of force each way at 0.7 MPa. If you only need to push from one end, a single-rod SC cylinder is simpler and more cost-effective. For direct replacement, match the 40 mm bore, 16 mm stroke, PT1/4 ports, and basic mounting. Note that a double-rod cylinder offers enhanced rod guidance but is not a substitute for a fully guided cylinder under significant side loads.
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 SCD40X16 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. At 0.5 MPa it produces 345 N, at 0.7 MPa it's 528 N, and at the maximum operating pressure of 0.9 MPa, the force is 950 N in both directions.
Choose an SCD when you need to mount tooling, stops, or sensors on both ends of the piston rod, or when you require perfectly equal force and speed for both the extend and retract strokes. The dual-rod design also provides better inherent guidance against rod rotation compared to a single-rod cylinder.
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