Airtac SAID40 Double Rod Cylinder SAID40X125
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X125 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X125
The AirTAC SAID40X125 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 16mm carbon steel rod exiting both end covers. Because the piston sees a rod on both sides, the annulus area is identical in both directions, yielding an equal extend and retract force of 528N at 0.5 MPa.
A through-rod design lets you mount the primary workpiece on one end and a position flag or cam on the opposite end. The extruded aluminum barrel includes sensor grooves on both sides for flexible tracking, while adjustable air cushions at both ends decelerate the piston near stroke end.
Airtac SAID40 Double Rod Cylinder SAID40X125 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X125 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 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 SAID40X125
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 SAID40X125 Is Used
Symmetric Force Transfer
Drives loads with identical push and pull thrust, ensuring balanced motion profiles in transfer stations where equal force both ways is critical.
Anti-Rotation Slides
The twin 16mm carbon steel rods guide the load against rotation better than a single rod, maintaining precise alignment for sliding mechanisms.
Through-Rod Sensing
Mounts the workpiece on the front rod and a position flag on the rear rod to trigger external sensors without interfering with the primary work area.
Is the Airtac SAID40 Double Rod Cylinder SAID40X125 the Right Cylinder?
Choose this 40mm bore when an application requires symmetric thrust and anti-rotation guidance that a single-rod SAI cannot provide. If your mechanism needs slightly less force, step down to the 32mm bore (345N both ways); if you need greater thrust, step up to the 50mm bore (825N both ways). The PT tapered porting matches the G1/4 standard for this bore size.
This model uses the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting the FB, CA, CB, and CR accessories found on single-rod variants. Note that a plain SAID does not hold its position if air pressure is lost; for positive holding, consider the SAIL or BSAID series. As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders.
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 SAID40X125 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the push and pull forces are equal. It provides 528N of force in both directions at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa.
Yes, it is dimensionally interchangeable per ISO 15552. It supports the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting styles, but omits the FB, CA, CB, and CR brackets used only on single-rod SAI cylinders.
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