Airtac SAID40 Double Rod Cylinder SAID40AX275S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX275S 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 SAID40AX275S
The AirTAC SAID40X275-S is a double-acting, double-rod ISO 15552 profile cylinder. Because a rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528 N of force each way at 0.5 MPa. The included magnet (-S) enables position sensing, while the SUS420J2 stainless steel rod (material code A) provides enhanced corrosion resistance compared to standard carbon steel.
This through-rod design allows mounting a primary workpiece on the front and a cam or position flag on the rear rod end for dual-side guidance. The extruded aluminum barrel features sensor grooves on both sides for CMSE reed and DMSE electronic switches. It uses PT tapered port threads and adjustable air cushions at both ends to decelerate the piston near stroke extremes.
Airtac SAID40 Double Rod Cylinder SAID40AX275S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX275S |
|---|---|
| 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 SAID40AX275S
| 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 SAID40AX275S Is Used
Symmetric Force Transfer
Drives a transfer arm where the matching extend and retract speed prevents cycle timing asymmetry in automated packaging lines.
Anti-Rotation Slides
Guides a vertical lifting slide without twisting, using the twin-rod structure to resist rotational torque during heavy vertical positioning.
Rear-Cam Actuation
Actuates a primary clamping jaw on the front rod while the protruding rear end trips a mechanical limit valve or DMSE sensor flag.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX275S the Right Cylinder?
Choose this 40mm bore over the smaller 32mm (345 N at 0.5 MPa) when your application needs higher bidirectional thrust, or step up to the 50mm (825 N) if the load demands more push/pull capacity. The twin-rod architecture is specifically selected over a single-rod SAI when a machine requires anti-rotation guidance, symmetric force transfer, or rear-rod actuation of a secondary mechanism.
At 275mm stroke, the unsupported rod length increases bending moments on the rod bearing; use an external guide rail to prevent excessive side-load wear. Note that the adjustable cushions only decelerate the piston and do not hold a load—if air pressure is lost, the cylinder drifts, requiring a SAIL lock or external pilot-operated check valve for position holding. It is dimensionally interchangeable per ISO 15552, using a Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interface.
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 SAID40AX275S FAQ
Because the double-rod design subtracts the rod area from both sides, the extend and retract forces are equal. It outputs 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa in both directions.
Yes, it is dimensionally interchangeable per ISO 15552 mounting dimensions. It serves as a drop-in replacement for other ISO 15552 profile double-rod cylinders, utilizing a G1/4 port and PT tapered threads.
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