Airtac SAID40 Double Rod Cylinder SAID40X155S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X155S 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 SAID40X155S
The AirTAC SAID40X155-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 155mm stroke. Because a carbon steel rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal bidirectional force of 528N at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides.
Fitted with a magnet (-S), it supports AirTAC CMSE reed and DMSE solid-state switches for dual-end position feedback. The rear rod extension is perfect for mounting a cam or limit flag, providing superior anti-rotation guidance compared to a single-rod SAI.
Airtac SAID40 Double Rod Cylinder SAID40X155S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X155S |
|---|---|
| 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 SAID40X155S
| 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 SAID40X155S Is Used
Symmetric Force Transfer
Delivers equal 528N push and pull forces at 0.5 MPa, ideal for mechanisms requiring perfectly balanced dual-directional power without speed variations.
Rear-Rod Cam Actuation
The protruding rear rod drives a secondary mechanism or cam, keeping the load guided against rotation better than a single-rod cylinder.
Dual-End Position Sensing
Equipped with a -S magnet for CMSE and DMSE switches, enabling precise electronic or reed sensor feedback at both stroke extremes.
Is the Airtac SAID40 Double Rod Cylinder SAID40X155S the Right Cylinder?
Choose this double-rod configuration when your mechanism requires symmetric force, twin-station actuation, or a rear-rod cam. If you need less force, the 32mm bore offers 345N both ways at 0.5 MPa; if you need more, the 50mm bore provides 825N. As a true ISO 15552 profile cylinder, it is dimensionally interchangeable with other ISO 15552 double-rod cylinders.
This model uses a PT tapered G1/4 port and supports mountings Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB/CA/CB/CR). Note that air cushions only decelerate the piston near stroke end; a plain SAID will drift if air is lost, so use a SAIL or BSAID lock 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 SAID40X155S FAQ
Because the double-rod design subtracts the rod area on both sides, the extend and retract forces are equal. It generates 528N both ways at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa.
Yes, the SAID40X155-S is an extruded aluminum profile cylinder with an ISO 15552 mounting interface, making it dimensionally interchangeable with other ISO 15552 double-rod cylinders.
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