Airtac SAID40 Double Rod Cylinder SAID40AX250S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX250S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX250S
The AirTAC SAID40X250-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 250mm stroke. Because the piston rod extends from both end covers, the annulus area is identical on both sides, yielding exactly 528N of force in both extend and retract directions at 0.5MPa. The -S suffix indicates an integrated magnet for position sensing.
This variant uses a SUS420J2 stainless steel rod (material code A) for enhanced durability against moisture. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount CMSE reed or DMSE electronic switches on either end to track the twin rod outputs.
Airtac SAID40 Double Rod Cylinder SAID40AX250S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX250S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAID40AX250S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SAID40AX250S Is Used
Symmetric Transfer
Drives a transfer carriage with identical 528N force and speed in both directions, preventing jerky movements during bidirectional material handling.
Dual-Station Actuation
Simultaneously operates two separate mechanisms from one piston, using the front rod to push a part and the rear rod to trigger a DMSE electronic sensor.
Anti-Rotation Slides
Guides a vertical sliding gate against rotation by anchoring the load across the twin rod outputs, maintaining precise linear tracking without twisting.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX250S the Right Cylinder?
Select this 40mm bore when an application requires equal push and pull forces alongside dual-side actuation, stepping up from a 32mm bore (345N both ways) or down from a 50mm bore (825N both ways). A double-rod design is preferred over a single-rod SAI when you need to mount a workpiece on the front rod and a cam or position flag on the rear rod, providing superior anti-rotation guidance for the load.
At 250mm stroke, the unsupported rod length increases; use an external guide to prevent rod-bearing bending under side loads. For ISO 15552 drop-in replacements, match the 40mm bore, 250mm stroke, PT G1/4 port, and mounting accessories (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Note that adjustable air cushions only decelerate the piston near stroke end; this cylinder will drift if air pressure is lost, so use a SAIL lock or external pilot-operated check valve if position holding is required.
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 SAID40AX250S FAQ
Because the rod occupies both sides of the piston, the effective area is equal in both directions. It provides 528N of force at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa for both extend and retract strokes.
Yes, the SAID40X250-S is dimensionally interchangeable per ISO 15552. You can drop it in for other ISO 15552 double-rod cylinders by matching the 40mm bore, 250mm stroke, G1/4 PT port, and compatible mounting accessories like FA or TC.
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