Airtac SAID40 Double Rod Cylinder SAID40X400
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X400 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X400
The AirTAC SAID40X400 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 400mm stroke. Because a carbon steel rod exits both ends, the annulus area is identical on extend and retract, yielding a perfectly symmetrical 528N output at 0.5MPa in either direction. The barrel is extruded aluminum with sensor grooves on both sides.
This through-rod design allows mounting a primary workpiece on one end while attaching a position flag or cam to the rear. It uses a G1/4 port and adjustable air cushions at both ends to decelerate the piston near stroke limits.
Airtac SAID40 Double Rod Cylinder SAID40X400 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X400 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAID40X400
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SAID40X400 Is Used
Symmetric Transfer
Moves parts with identical 528N force and speed in both directions, ensuring stable symmetric transfer without momentum shifts.
Anti-Rotation Slide
The twin carbon steel rods prevent piston rotation, making it ideal for lifting slides or tooling that must remain perfectly aligned.
Rear-Cam Actuation
Drives a primary workpiece on the front rod while the rear rod end operates a secondary cam or mechanical limit flag.
Is the Airtac SAID40 Double Rod Cylinder SAID40X400 the Right Cylinder?
Choose this 40mm bore when an application requires 528N of balanced push and pull force at 0.5MPa. If your mechanism needs less force, step down to the 32mm bore (345N); if you need more clamping or lifting power, step up to the 50mm bore (825N). The twin-rod layout is selected over a single-rod SAI when dual-side guidance, anti-rotation, or rear-end sensing is required. It uses a reduced mounting accessory set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets.
At 400mm, the stroke is long but within standard limits. However, long unsupported strokes increase the risk of rod-bearing bending under side loads; use an external guide to prevent premature wear. Note that this cylinder does not hold its position if air pressure is lost—use SAIL or BSAID variants if locking is required. It is dimensionally interchangeable per ISO 15552.
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 SAID40X400 FAQ
Because it is a double-rod cylinder, the effective area is the same on both sides. It delivers 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa in both extend and retract directions.
Yes, it is dimensionally interchangeable with ISO 15552 cylinders. It supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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