Airtac SAID40 Double Rod Cylinder SAID40X350
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X350 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X350
The AirTAC SAID40X350 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 350mm stroke. Because a carbon steel rod exits both end covers, the annulus area is identical on extend and retract, yielding equal force and velocity in both directions. You get exactly 528 N of thrust and pull at 0.5 MPa, preventing speed imbalances common to single-rod units.
Beyond balanced motion, the rear rod extension is designed to mount a secondary cam, position flag, or drive a separate mechanism. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches, though this specific configuration omits the -S magnet. It uses a G1/4 port and adjustable air cushions at both ends to decelerate the piston near stroke end.
Airtac SAID40 Double Rod Cylinder SAID40X350 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X350 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAID40X350
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SAID40X350 Is Used
Symmetric Force Transfer
Ideal for moving loads that require identical push and pull dynamics, ensuring consistent cycle times without pressure compensation.
Anti-Rotation Slides
The twin-rod architecture prevents the piston from twisting under offset loads, keeping precision tooling perfectly aligned.
Through-Rod Sensing
The protruding rear rod provides a mounting point for a secondary cam or DMSE sensor flag to track position from the opposite end.
Is the Airtac SAID40 Double Rod Cylinder SAID40X350 the Right Cylinder?
Choose this 40mm bore when you need more force than the 32mm version (345 N at 0.5 MPa) but want to step down from the 63mm class (1402 N at 0.5 MPa) to save space and air volume. The double-rod design is specifically selected over a single-rod SAI when an application demands high anti-rotation resistance, dual-side workpiece guidance, or rear-rod position sensing.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the stroke is 350mm, the longer unsupported rod is susceptible to side-load bending; use an external guide rail to prevent rod-bearing wear. Note that a plain SAID does not hold its load when air is exhausted—use a SAIL or BSAID lock variant 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 SAID40X350 FAQ
Because the double-rod design subtracts the rod area from both sides, the force is equal in both directions. It delivers 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, it uses a true ISO 15552 footprint and is interchangeable with standard profile cylinders, but it only supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts (excluding FB, CA, CB, and CR).
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