Airtac SAID40 Double Rod Cylinder SAID40X280
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X280 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X280
The AirTAC SAID40X280 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 16mm carbon steel rod exiting both end covers. Because the piston area is equally occupied by the twin rods, the annulus area is identical in both directions. This means the extend and retract forces are perfectly matched, yielding 528N each way at 0.5MPa and 950N at 0.9MPa. A single piston drives the load from the front while the rear rod end can simultaneously mount a position flag or cam.
This through-rod design provides superior anti-rotation guidance compared to a single-rod SAI cylinder. The extruded aluminum barrel includes dual-side sensor grooves compatible with AirTAC CMSE reed and DMSE solid-state switches (requires the -S magnet option). The adjustable air cushions at both ends are tuned for a 30-800mm/s speed range, while the PT tapered port threads ensure a tight pneumatic seal.
Airtac SAID40 Double Rod Cylinder SAID40X280 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X280 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 280 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 SAID40X280
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×280 | 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 SAID40X280 Is Used
Symmetric Force Transfer
Drives push and pull mechanisms requiring equal 528N force in both directions, preventing speed discrepancies in automated transfer lines.
Anti-Rotation Slides
The twin 16mm rods guide the workpiece rigidly, preventing rotation during vertical or horizontal clamping without external guide rails.
Rear-Rod Position Sensing
Mounts a cam or DMSE solid-state sensor flag on the rear rod end to trigger downstream sequencing without interfering with the primary front load.
Is the Airtac SAID40 Double Rod Cylinder SAID40X280 the Right Cylinder?
Choose this 40mm bore when an application requires symmetric force and dual-side actuation, stepping up from the 32mm bore (345N at 0.5MPa) for higher thrust, or stepping down from the 50mm bore (825N at 0.5MPa) to save space. The twin-rod architecture is selected over a single-rod SAI when the mechanism needs strict anti-rotation control, twin-station actuation, or rear-rod limit sensing. Note that the SAID mounting accessory set is reduced to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets used on single-rod variants.
Because the 280mm stroke is substantial, the unsupported load can induce side-load bending on the rod bearings; an external guide rail is recommended to prevent premature wear. This cylinder is dimensionally interchangeable per ISO 15552, making it a drop-in replacement for other ISO 15552 double-rod cylinders. Remember that a plain SAID does not hold its load when air pressure is lost or exhausted; if position holding is required without live pressure, consider a SAIL lock, BSAID clamp-lock, 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 SAID40X280 FAQ
Because the double-rod design creates equal annulus areas on both sides, the push and pull forces are identical. It delivers 528N both ways at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa.
Yes, it is dimensionally interchangeable with ISO 15552 double-rod profile cylinders. However, the SAID bracket set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2; it does not support the FB, CA, CB, or CR mounts found on single-rod versions.
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