Airtac SAID40 Double Rod Cylinder SAID40AX270S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX270S 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 SAID40AX270S
The AirTAC SAID40X270-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40 mm bore and 270 mm stroke. Because a rod exits both end covers, the annulus area is identical on extend and retract, yielding equal force and speed in both directions. It delivers 528 N each way at 0.5 MPa and 739 N at 0.7 MPa.
This variant includes a piston magnet for position sensing with AirTAC CMSE reed and DMSE electronic switches. The rod is constructed from SUS420J2 stainless steel for superior corrosion resistance, and the fluid port utilizes a PT tapered thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Airtac SAID40 Double Rod Cylinder SAID40AX270S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX270S |
|---|---|
| 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 SAID40AX270S
| 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 SAID40AX270S Is Used
Symmetric-Force Transfer
Drives a workpiece back and forth with identical 528 N force in both directions, ensuring consistent cycle timing without pressure compensation.
Anti-Rotation Slides
Uses the twin-rod geometry to prevent mechanical twisting and guide precision slides smoothly over the 270 mm travel distance.
Rear-Rod Cam Actuation
Mounts the primary tool on the front rod while the rear rod drives a secondary cam or position flag for external equipment sequencing.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX270S the Right Cylinder?
Choose this 40 mm bore when you need balanced bidirectional force that a single-rod SAI cannot provide, or step down to a 32 mm bore (345 N at 0.5 MPa) for lighter loads. The twin-rod design is essential for applications requiring dual-side guidance, anti-rotation stability, or a rear-rod cam. It supports mounting accessories from the SAID set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
At a 270 mm stroke, the unsupported rod length increases the risk of rod-bearing bending under side loads; use an external guide for heavy or off-center masses. Note that adjustable air cushions only decelerate the piston near stroke end and do not hold the load if air pressure is lost. For position holding without live pressure, consider an SAIL lock cylinder or an external pilot-operated check valve.
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 SAID40AX270S FAQ
Because the double-rod design has equal piston annulus areas on both sides, it provides 528 N of force at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa in both extend and retract directions.
Yes, the SAID40X270-S is dimensionally interchangeable per ISO 15552 mounting interface dimensions, making it a drop-in replacement for other ISO 15552 profile-type double-rod cylinders. It uses PT tapered ports.
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