Airtac SAID40 Double Rod Cylinder SAID40BX155S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX155S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX155S
The AirTAC SAID40X155-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and a 155mm non-standard stroke. Because a rod exits both end covers, the annulus area is identical on extend and retract, yielding equal force and speed in both directions. It provides 528 N of thrust and pull at 0.5 MPa (739 N at 0.7 MPa) each way.
This variant includes a magnet for position sensing and uses SUS304 stainless steel rods for superior corrosion resistance. The through-rod design allows mounting a workpiece on the front and a cam, guide, or CMSE/DMSE sensor flag on the rear, providing dual-side guidance and excellent anti-rotation stability. The barrel is extruded aluminum with sensor grooves on both sides, and ports are PT tapered threads.
Airtac SAID40 Double Rod Cylinder SAID40BX155S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX155S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 155 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 SAID40BX155S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×155 | 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 SAID40BX155S Is Used
Symmetric Force Transfer
Drives a shuttle mechanism where equal 528N push and pull forces at 0.5MPa are critical for consistent timing in both travel directions.
Anti-Rotation Slides
Uses the twin SUS304 rods to guide a heavy sliding carriage, preventing twist and maintaining precise alignment without external guides.
Rear-Cam Actuation
Mounts the primary tool on the front rod while the rear rod drives a cam or DMSE electronic sensor flag to trigger secondary machine logic.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX155S the Right Cylinder?
Choose this non-standard 155mm stroke unit when a 150mm standard stroke is slightly too short and 175mm is too long, ensuring exact fitment for your specific fixture. If your application requires less force, stepping down to the 32mm bore yields 345 N both ways at 0.5 MPa; if you need more push or pull, the 50mm bore provides 825 N each way. The twin-rod architecture is selected over a single-rod SAI when symmetric force, anti-rotation guidance, or rear-rod actuation is required.
As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders, using mounting options Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; they do not hold a load. If air pressure is lost, the piston drifts, so use an external rod lock or a SAIL/BSAID cylinder if position holding is required. Because the rod protrudes from the rear, ensure you have adequate clearance for the extended length.
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 SAID40BX155S FAQ
Because the double-rod design subtracts the rod area on both sides, the force is identical in both directions. It delivers 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa for both extend and retract strokes.
Yes, it is a true ISO 15552 profile cylinder, making its mounting dimensions interchangeable with other ISO 15552 double-rod cylinders. It supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, but omits the FB, CA, CB, and CR styles used by single-rod variants.
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