Airtac SAID40 Double Rod Cylinder SAID40AX120
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX120 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX120
The AirTAC SAID40X120 is a double-acting, double-rod profile cylinder built to ISO 15552 dimensional standards, meaning a single piston drives a rod out of both end covers. Because the annulus area is identical on both sides, it generates exactly 528 N of thrust and pull force at 0.5 MPa, ensuring perfectly symmetric motion. This through-rod design allows you to mount the primary workpiece on one end and a secondary cam or position flag on the rear.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance over standard carbon steel. It uses PT tapered port threads and lacks a piston magnet, relying instead on its robust mechanical layout. The extruded aluminum barrel includes sensor grooves on both sides, giving you flexible mounting options for external limit switches.
Airtac SAID40 Double Rod Cylinder SAID40AX120 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX120 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 120 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 SAID40AX120
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×120 | 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 SAID40AX120 Is Used
Symmetric Transfer
Pushes and pulls identical loads with matched 528 N force, ensuring stable transit without speed variations between stroke directions.
Anti-Rotation Slide
Twin rod ends prevent mechanical twisting under offset loads, providing precise linear guidance for sliding fixtures.
Rear-Cam Actuation
The extended rear rod drives a secondary mechanism or trips an external limit switch while the front rod performs the primary work.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX120 the Right Cylinder?
Selecting this 40mm bore over the smaller SAID32 (345 N) provides greater both-way force without the bulk of a SAID50 (825 N). A double-rod design is specifically chosen when an application demands dual-side guidance, anti-rotation resistance, or simultaneous actuation of two separate stations, which a single-rod SAI cannot achieve. Because this unit lacks a piston magnet, position sensing must be handled externally rather than with internal CMSE or DMSE switches.
For dimensionally interchangeable drop-in replacements, match the 40mm bore, 120mm stroke, and PT G1/4 porting. Available mounting accessories include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (note that FB, CA, CB, and CR are single-rod SAI only). Remember that the adjustable air cushions only decelerate the piston near stroke end; they do not hold a load. If pressure is lost, the cylinder will drift, requiring an external rod lock or a SAIL/BSAID variant for secure positioning.
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 SAID40AX120 FAQ
Because it is a double-rod cylinder, the effective piston area is identical in both directions. It delivers 528 N of force at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa for both extension and retraction.
Yes, the SAID40X120 is dimensionally interchangeable per ISO 15552 standards. You can use it as a drop-in replacement for other ISO 15552 double-rod profile cylinders with matching 40mm bore and 120mm stroke specifications.
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