Airtac SAID40 Double Rod Cylinder SAID40X240
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X240 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X240
The AirTAC SAID40X240 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 240mm stroke. Because a carbon steel rod exits both end covers, the effective annulus area is identical on extend and retract, yielding exactly 528N of force each way at 0.5 MPa. The unit uses a PT tapered G1/4 port and includes adjustable air cushions at both ends.
This through-rod design allows you to mount the primary workpiece on one end while attaching a position flag, cam, or secondary mechanism to the rear rod. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches, though note this specific SKU is supplied without a magnet.
Airtac SAID40 Double Rod Cylinder SAID40X240 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X240 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 240 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 SAID40X240
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×240 | 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 SAID40X240 Is Used
Symmetric Force Transfer
Drives a shuttle mechanism where equal push and pull thrust (528N at 0.5 MPa) ensures consistent cycle times in both directions without pressure compensation.
Anti-Rotation Slides
Uses the twin-rod geometry to guide a heavy vertical load, preventing the mechanical drift and torsional twist that single-rod cylinders experience.
Rear-Rod Cam Actuation
Mounts the main tool on the front rod while the rear rod drives a secondary cam or limit flag to trigger downstream pneumatic logic.
Is the Airtac SAID40 Double Rod Cylinder SAID40X240 the Right Cylinder?
Choose this 40mm bore when an application demands equal push and pull forces, such as 528N at 0.5 MPa or 739N at 0.7 MPa. If your mechanism requires less force, the 32mm bore offers 345N both ways; if you need more clamping power, the 50mm bore provides 825N. The twin-rod architecture is selected over a single-rod SAI when the load needs dual-side guidance to prevent rotation or when a rear rod is required for secondary actuation. As a true ISO 15552 cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders.
For a 240mm stroke, the unsupported rod length is moderate, but always verify side-load limits on the rod-bearing. If high radial loads are present, add an external guide to prevent premature seal wear. Remember that a plain SAID does not hold its position when air is lost; if load holding without live pressure is required, consider the SAIL or BSAID series. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAID40X240 FAQ
Because the rod occupies both sides of the piston, the effective area is identical in both directions. It provides 528N of force at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extension and retraction.
Yes, the SAID40X240 is a true ISO 15552 profile cylinder, making it dimensionally interchangeable with other ISO 15552 double-rod cylinders. It uses a PT G1/4 port and supports the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting interfaces.
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