Airtac SAID40 Double Rod Cylinder SAID40X800S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X800S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X800S
The AirTAC SAID40X800-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and an 800mm stroke. Because the twin carbon steel rods occupy both sides of the piston, the annulus area is identical in each direction, yielding a perfectly symmetrical 528N output at 0.5 MPa for both extension and retraction. The -S suffix denotes an integrated magnet for position sensing via AirTAC CMSE reed and DMSE electronic switches.
Having a rod exit both end covers allows you to mount the primary workpiece on one end while utilizing the rear rod end for a secondary cam, position flag, or external guidance. This through-rod layout provides superior resistance to torsional rotation compared to a single-rod SAI. The extruded aluminum barrel includes sensor grooves on both sides, and the PT tapered port threads ensure a robust pneumatic seal.
Airtac SAID40 Double Rod Cylinder SAID40X800S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X800S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 800 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 SAID40X800S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×800 | 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 SAID40X800S Is Used
Symmetric Force Transfer
Ideal for shuttle mechanisms requiring identical push and pull forces, utilizing the equal annulus area on both sides of the piston to maintain consistent speed and thrust.
Anti-Rotation Slides
The twin carbon steel rods provide high torsional rigidity, preventing the load from rotating during transit along the 800mm stroke without needing external guides.
Through-Rod Sensing
The -S magnet allows CMSE/DMSE sensors to track position, while the rear rod end can simultaneously drive a secondary mechanical flag or limit switch.
Is the Airtac SAID40 Double Rod Cylinder SAID40X800S the Right Cylinder?
Selecting this 40mm bore over the smaller 32mm (345N at 0.5 MPa) gives you a higher force capacity without a significant footprint increase, while stepping up to a 50mm bore (825N at 0.5 MPa) is recommended if your load demands more thrust. The double-rod design is specifically chosen when an application requires equal push/pull forces, anti-rotation stability, or dual-side actuation. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; this cylinder will not hold a load if air pressure is lost. For position holding, consider a SAIL or BSAID variant.
At 800mm, this cylinder is at the maximum standard stroke limit for this bore. The extended length is considerably longer than a single-rod SAI because the rear rod protrudes out of the back cover, requiring additional machine clearance. Furthermore, an 800mm unsupported stroke exerts high leverage on the rod bearings under side loads; always utilize an external guide rail to prevent premature bearing wear. This unit is dimensionally interchangeable per ISO 15552 and uses the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, 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 SAID40X800S FAQ
The double-rod design means the force is equal in both directions. It provides 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa for both extension and retraction.
Yes, it is dimensionally interchangeable per ISO 15552 and uses the standard SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), making it a drop-in replacement for other ISO 15552 double-rod profile cylinders.
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