Airtac SAID40 Double Rod Cylinder SAID40AX70S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX70S 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 SAID40AX70S
The AirTAC SAID40X70-S is a double-acting, double-rod ISO 15552 profile cylinder. A single piston drives a rod out of both end covers, yielding identical extend and retract forces. Because the annulus area is symmetrical, you get 528 N of thrust and pull force in either direction at 0.5 MPa (739 N at 0.7 MPa).
This through-rod configuration is purpose-built for multi-axis tasks: mount the primary workpiece on the front thread and a position flag or cam on the rear extension. The -S suffix indicates an integrated magnet for CMSE reed and DMSE solid-state sensors, while the SUS420J2 (A) stainless steel rod provides enhanced corrosion resistance over standard carbon steel.
Airtac SAID40 Double Rod Cylinder SAID40AX70S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX70S |
|---|---|
| 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 SAID40AX70S
| 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 SAID40AX70S Is Used
Symmetric Transfer Unit
Drives a shuttle mechanism where the equal 528 N extend and retract forces at 0.5 MPa prevent directional force imbalances during high-speed part transfer.
Anti-Rotation Slide
Utilizes the twin-rod design to guide a heavy vertical slide, preventing piston rotation without requiring external guide rails or linear bearings.
Rear-Cam Actuation
Mounts the primary tool on the front M12x1.25 thread while using the rear rod end to drive a secondary cam or trigger a DMSE solid-state sensor.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX70S the Right Cylinder?
Select this 40 mm bore when an application strictly requires symmetric force and speed for both push and pull strokes. If your mechanism demands higher thrust, stepping up to the 50 mm bore raises the both-way output to 825 N at 0.5 MPa. Conversely, downsizing to the 32 mm bore drops the equal bidirectional force to 345 N.
Choose a double-rod SAID over a single-rod SAI when you need dual-side guidance to prevent rotation, or require rear-end position sensing. This 70 mm stroke is standard and compact, but note that the rear rod protrudes from the back cover, requiring extra clearance. The PT G1/4 port and adjustable air cushions at both ends ensure controlled deceleration. Remember, a plain SAID does not hold loads without live air pressure; if mid-stroke locking is required, use an external rod lock or pilot-operated check valve. Mounting options are restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAID40AX70S FAQ
Because the rod exits both ends, the effective piston area is identical in both directions. The force is 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa for both extend and retract strokes.
Yes, the SAID40X70-S is dimensionally interchangeable per ISO 15552 standards and can serve as a drop-in replacement for other ISO 15552 profile-type double-rod cylinders, matching the G1/4 port and 16 mm rod diameter.
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