Airtac SAID40 Double Rod Cylinder SAID40AX900
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX900 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX900
The AirTAC SAID40X900 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and a 900mm made-to-order stroke. Because the twin rods occupy both sides of the piston, the annular area is identical in each direction, yielding exactly 528 N of force both extending and retracting at 0.5 MPa. This equal-force symmetry prevents speed drift between strokes.
Equipped with SUS420J2 stainless steel rods (material code A), this variant provides enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides. Note that because a rod protrudes from the rear cover, the overall length is greater than a single-rod unit and requires extra clearance behind the cylinder.
Airtac SAID40 Double Rod Cylinder SAID40AX900 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX900 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 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 SAID40AX900
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | 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 SAID40AX900 Is Used
Anti-Rotation Slides
The through-rod design provides dual-side guidance, preventing piston rotation during long 900mm traverses in precision material handling slides.
Symmetric-Force Transfer
Delivers 528 N of equal push and pull force at 0.5 MPa, ensuring consistent speed and power regardless of the travel direction.
Rear-Cam Actuation
The rear rod end drives a secondary cam or mechanical flag, allowing designers to trigger mechanical limit switches independently of the front workpiece.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX900 the Right Cylinder?
Select this 40mm bore model when an application demands 528 N of symmetric force at 0.5 MPa; step down to a 32mm bore (345 N) for lighter loads or up to a 50mm bore (825 N) for heavier pushing and pulling. A twin-rod design is chosen over a single-rod SAI when the mechanism requires dual-side guidance to prevent rotation, or when a rear-mounted cam and position flag must trigger external sensors. This non-standard 900mm stroke is built to order, exceeding the 800mm maximum standard stroke for this bore.
This cylinder uses PT tapered port threads (G1/4) and supports the reduced SAID mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the 900mm stroke is exceptionally long, the unsupported rod bearing is highly susceptible to bending under side loads; always use an external guide rail to support the workpiece. Furthermore, the adjustable air cushions at both ends only decelerate the piston near stroke end and do not hold the load—if pressure is lost, the cylinder drifts, requiring an external pilot-operated check valve or a SAIL/BSAID lock cylinder for position holding.
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 SAID40AX900 FAQ
Because the double-rod design subtracts the rod area from both sides, the force is equal in both directions: 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, it is dimensionally interchangeable per ISO 15552. However, the SAID series uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets found on single-rod variants.
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