Airtac SAID40 Double Rod Cylinder SAID40BX115
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40BX115 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40BX115
The AirTAC SAID40X115 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 115mm stroke. Because the piston rod extends from both end covers, the annulus area is identical on both sides, yielding exactly 528N of force in both extend and retract directions at 0.5MPa. This symmetric output is ideal for mechanisms requiring consistent push and pull dynamics.
This configuration incorporates a SUS304 stainless steel rod for superior corrosion resistance and ships with PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount CMSE reed or DMSE electronic switches on either end to track the dual rod ends.
Airtac SAID40 Double Rod Cylinder SAID40BX115 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40BX115 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 115 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 SAID40BX115
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×115 | 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 SAID40BX115 Is Used
Symmetric Transfer
Drives a transfer arm with identical push and pull thrust, ensuring smooth, balanced motion without speed fluctuations between stroke ends.
Anti-Rotation Slides
The twin-rod geometry prevents piston rotation, guiding precision slides and grippers accurately without needing external linear bearings.
Dual-Side Actuation
Mounts the primary workpiece on the front rod and a secondary cam or limit flag on the rear rod to trigger external sensors mid-stroke.
Is the Airtac SAID40 Double Rod Cylinder SAID40BX115 the Right Cylinder?
Select this 40mm bore when an application demands equal force both ways, stepping up from a 32mm bore (345N at 0.5MPa) or down from a 50mm bore (825N). A double-rod design is preferred over a single-rod SAI when you need to drive a load from one end while mounting a cam, position flag, or secondary tool on the rear rod, providing better anti-rotation guidance. It supports the standard SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) but omits FB, CA, CB, and CR accessories.
Keep in mind the adjustable air cushions only decelerate the piston near stroke end and do not hold the load if air pressure is lost; for position holding without live pressure, consider an external rod lock or the BSAID clamp-lock variant. The 115mm stroke is within standard limits, but always ensure the rear protruding rod has adequate clearance in your machine frame.
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 SAID40BX115 FAQ
Because it is a double-rod cylinder, the effective piston area is the same on both sides. It provides 528N of force in both directions at 0.5MPa, and 739N at 0.7MPa.
Yes, the SAID40X115 is dimensionally interchangeable per ISO 15552 standards. It serves as a drop-in replacement for other ISO 15552 profile cylinders, matching the standard mounting footprint and PT port locations.
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