Airtac SCD Standard Cylinder SCD40X35
The AirTAC Airtac SCD Standard Cylinder SCD40X35 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, 35mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Rod (both ends)Ø16 mm
- Stroke35 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac SCD Standard Cylinder SCD40X35
The SCD40X35 is a double-acting, double-rod pneumatic cylinder delivering perfectly symmetrical force in both directions. At 0.7 MPa, it outputs 528 N of push and 528 N of pull, thanks to the through-rod design where the Ø16 mm piston rod extends from both end caps, subtracting its area from both sides of the piston equally.
With a compact 35 mm stroke, this genuine AirTAC cylinder is ideal for short, bidirectional actuation tasks. Its tie-rod construction and adjustable air cushion (21 mm length) at each end provide smooth deceleration, while the PT1/4 ports ensure straightforward pneumatic connection.
Airtac SCD Standard Cylinder SCD40X35 Technical Specifications
| Model | Airtac SCD Standard Cylinder SCD40X35 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø40 mm |
| Rod diameter | Ø16 mm (both ends) |
| Stroke | 35 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 SCD40X35
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 40 | Bore size in mm. |
| ×35 | 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 SCD40X35 Is Used
Bidirectional Clamping
Operates two opposing clamp arms from a single cylinder body, ensuring equal clamping pressure is applied simultaneously from both sides of a workpiece.
Non-Rotating Pusher
The dual-rod design provides inherent anti-rotation stability for a short-stroke pusher, maintaining alignment without needing an external guide for light-duty ejection.
Dual-Sided Sensor Flag
The rear rod extension can carry a sensor flag or trip dog for end-of-stroke detection, keeping the front tooling area clear for the primary workpiece interface.
Is the Airtac SCD Standard Cylinder SCD40X35 the Right Cylinder?
Choose the SCD40X35 when your mechanism needs identical force and speed extending and retracting over a short distance. If you need more thrust, the SCD50 series offers 825 N at 0.7 MPa. For applications where force is only needed in one direction, a single-rod SC cylinder provides a higher push force from the same bore size. This model is a direct replacement for another AirTAC SCD40 cylinder of matching stroke, PT port thread, and basic mounting. For strokes over 300 mm, assess the unsupported rod length for potential bending under 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 SCD40X35 FAQ
Because it is a double-rod cylinder, the push and pull forces are identical. The effective piston area is the same on both sides. 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 reaches 950 N in both directions.
Use the SCD when you need equal force and speed in both directions, or when you need to mount tooling or a sensor target on the rear rod. The through-rod also provides better guidance and resistance to side load than a single-rod cylinder, though it is not a substitute for a fully guided actuator under heavy lateral forces.
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