Airtac SAID40 Double Rod Cylinder SAID40X70
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X70 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 70mm 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
- Stroke70 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X70
The AirTAC SAID40X70 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 70mm stroke. Because a carbon steel rod exits both ends, the annulus area is identical on extend and retract, yielding an equal 528 N of force both directions at 0.5 MPa. This symmetric output is ideal for twin-station actuation and maintaining precise motion control.
Beyond balanced thrust, the through-rod design allows you to mount the primary workpiece on one end while attaching a cam, position flag, or secondary mechanism to the rear rod. The extruded aluminum barrel includes sensor grooves on both sides, and the adjustable air cushions at both ends absorb end-of-stroke impact. It uses PT tapered G1/4 ports and standard TPU seals for reliable daily operation.
Airtac SAID40 Double Rod Cylinder SAID40X70 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X70 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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 SAID40X70
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 SAID40X70 Is Used
Symmetric Force Transfer
Drives a dual-station mechanism where the 528 N extend and retract forces must remain perfectly matched to prevent machine binding.
Rear-Rod Cam Actuation
Mounts the primary tool on the front rod while using the rear protrusion to trigger a mechanical limit valve or secondary cam.
Anti-Rotation Slides
Uses the twin-rod guidance to keep the load perfectly indexed against rotational drift during vertical clamping tasks.
Is the Airtac SAID40 Double Rod Cylinder SAID40X70 the Right Cylinder?
Choose the SAID40X70 when your mechanism requires anti-rotation guidance or dual-side actuation that a single-rod SAI cannot provide. If your application needs less force, stepping down to the 32mm bore offers 345 N both ways, while stepping up to the 50mm bore provides 825 N. Keep in mind that a plain SAID does not hold its load if air pressure is lost; for position holding, consider the SAIL or BSAID clamp-lock series.
This cylinder is dimensionally interchangeable per ISO 15552, making it a drop-in replacement for other ISO 15552 double-rod cylinders. Ensure you specify the 40mm bore, 70mm stroke, PT G1/4 port thread, and the appropriate mounting accessory from the SAID set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Since no -S magnet is specified, it will not support CMSE or DMSE sensors without modification.
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 SAID40X70 FAQ
The SAID40X70 delivers 528 N in both extend and retract directions at 0.5 MPa, and 739 N at 0.7 MPa. Because the rod occupies both sides of the piston, the push and pull forces are exactly equal.
Yes, the SAID40X70 is dimensionally interchangeable per ISO 15552. It uses a standard extruded aluminum profile barrel and PT G1/4 ports, making it a direct drop-in replacement for other ISO 15552 double-rod cylinders.
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