Airtac SAID40 Double Rod Cylinder SAID40X270
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X270 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 270mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke270 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X270
The AirTAC SAID40X270 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 270mm stroke. Because a carbon steel rod extends from both end covers, the annulus area is identical on extend and retract. This provides an equal force of 528N in both directions at 0.5MPa, ensuring perfectly symmetric motion control.
The twin-rod architecture allows you to mount the primary workpiece on one end and a position flag or cam on the opposite rear rod. The extruded aluminum barrel includes sensor grooves on both sides, and you can add a magnet for CMSE or DMSE switches if needed.
Airtac SAID40 Double Rod Cylinder SAID40X270 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X270 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 270 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID40 Double Rod Cylinder SAID40X270
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×270 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAID40 Double Rod Cylinder SAID40X270 Is Used
Symmetric Force Transfer
Drives a workpiece back and forth with identical 528N force on extend and retract, ensuring consistent processing pressure in both directions.
Anti-Rotation Slides
The twin-rod design inherently resists torsional twisting, keeping guided slides perfectly aligned without needing additional external linear bearings.
Rear-Side Actuation
Mount the main tool on the front rod and use the protruding rear rod end to mechanically trigger a remote secondary mechanism or limit flag.
Is the Airtac SAID40 Double Rod Cylinder SAID40X270 the Right Cylinder?
Select this 40mm bore model when your mechanism requires true bidirectional symmetry and anti-rotation guidance that a single-rod SAI cannot provide. If your application needs less force, stepping down to the 32mm bore yields 345N both ways; if you need more push and pull, the 50mm bore offers 825N at 0.5MPa. This cylinder uses a PT G1/4 port and supports mountings Basic, FA, LB, TC, FTC, TCM1, and TCM2.
With a 270mm stroke, the unsupported rod length is considerable, so an external guide is recommended to prevent rod-bearing bending under side loads. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not hold a load. If position holding without live pressure is required, consider a SAIL or BSAID variant.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAID40 Double Rod Cylinder SAID40X270 FAQ
Because the double-rod design occupies piston area on both sides, the extend and retract forces are equal. It outputs 528N both ways at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa.
Yes, the SAID40X270 is dimensionally interchangeable per ISO 15552 mounting-interface dimensions, making it a drop-in replacement for other ISO 15552 double-rod profile cylinders.
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