Airtac SAID40 Double Rod Cylinder SAID40AX275
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX275 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX275
The AirTAC SAID40X275 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 275mm stroke. Because the piston rod extends from both end covers, the effective annulus area is identical on both sides, yielding an equal extend and retract force of 528N at 0.5 MPa. This through-rod geometry is perfect for mounting a primary workpiece on the front while driving a cam or position flag on the rear.
This specific configuration utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. It features PT tapered port threads (G1/4) and lacks a piston magnet, meaning it is optimized for mechanical actuation rather than electronic position sensing.
Airtac SAID40 Double Rod Cylinder SAID40AX275 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX275 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 275 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 SAID40AX275
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×275 | 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 SAID40AX275 Is Used
Symmetric Force Transfer
Drives mechanisms where the 528N push and pull forces must be perfectly identical, ensuring consistent performance in both directions without pressure spikes.
Anti-Rotation Slides
The twin-rod architecture inherently resists torsional loads, guiding the workpiece securely and preventing rotation without needing external linear bearings.
Rear-Flag Actuation
Utilizes the protruding rear rod end to mechanically trip a limit switch or drive a secondary cam, keeping the primary front rod focused on the main work.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX275 the Right Cylinder?
Select this 40mm bore double-rod cylinder when your mechanism requires equal push and pull forces (528N at 0.5 MPa) or needs dual-side guidance to prevent rotation. If your application requires less force, stepping down to the 32mm bore provides 345N both ways, while stepping up to the 50mm bore offers 825N. A double-rod design is preferred over a single-rod SAI when you need to drive twin stations simultaneously or require rear-rod clearance for external limit flags.
With a 275mm stroke, the unsupported rod length is significant; you should use an external guide to prevent rod-bearing bending under side loads. Note that the adjustable air cushions at both ends 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 a SAIL lock cylinder or an external pilot-operated check valve. This model is dimensionally interchangeable per ISO 15552 and uses the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR.
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 SAID40AX275 FAQ
Because it is a double-rod cylinder, the effective piston area is the same on both sides. It outputs 528N of force in both extend and retract directions at 0.5 MPa, and 739N at 0.7 MPa.
Yes, it is dimensionally interchangeable with ISO 15552 profile cylinders. It supports a specific subset of mounts including Basic, FA, LB, TC, FTC, TCM1, and TCM2, but does not use the FB, CA, CB, or CR styles.
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