Airtac SAI40 Standard Air Cylinder SAI40BX135S
The AirTAC SAI40 Standard Air Cylinder SAI40BX135S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 135mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAI40 Standard Air Cylinder SAI40BX135S
The AirTAC SAI40X135-S is a double-acting ISO 15552 profile cylinder featuring a 40mm bore and a 135mm non-standard stroke. It delivers 628N of push force at 0.5MPa and 879N at 0.7MPa, making it a robust choice for mid-range actuation. The extruded aluminum barrel design omits tie-rods, providing a clean exterior that drops into standardized ISO 15552 mounting interfaces.
This specific configuration includes a SUS304 stainless steel piston rod for superior corrosion resistance in harsh environments. It is equipped with a magnet (-S) for direct compatibility with CMSE and DMSE series sensor switches, which seat neatly into the dual-side grooves on the barrel. Ports are cut with PT tapered threads, and adjustable air cushions at both ends ensure smooth deceleration.
Airtac SAI40 Standard Air Cylinder SAI40BX135S Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40BX135S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 135 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 SAI40 Standard Air Cylinder SAI40BX135S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×135 | 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 SAI40 Standard Air Cylinder SAI40BX135S Is Used
Stainless Rod Clamping
The SUS304 rod and 628N push force at 0.5MPa make this cylinder ideal for securing parts in machining centers where coolant splash would corrode standard carbon steel rods.
Mid-Stroke Diverter
With a 135mm stroke, it provides the exact extended reach needed to push packages on a sorting line, retracting smoothly thanks to the dual adjustable air cushions.
Sensor-Ready Gating
The integrated -S magnet works seamlessly with DMSE switches in the barrel grooves to confirm gate positions on automated assembly machinery.
Is the Airtac SAI40 Standard Air Cylinder SAI40BX135S the Right Cylinder?
Selecting this 40mm bore over the smaller 32mm variant increases your 0.5MPa push thrust from 402N to 628N, while stepping up to the 50mm bore yields 982N. The 135mm stroke is a made-to-order length that falls outside the standard increments, requiring a non-standard stroke designation. For this specific length, side-load risks are minimal, but always ensure the load is guided externally if heavy eccentric forces are present.
Because this is a double-acting cylinder, it relies entirely on continuous air pressure to hold position; the piston will drift if pressure is lost or the valve centers. Do not depend on the adjustable air cushion to act as a brake or holding mechanism. For applications requiring true position holding without live pressure, consider the SAIL (air-released lock) or BSAI (bidirectional clamp-lock) variants. Replacement is straightforward using standard ISO 15552 foot (LB) or flange (FA/FB) accessories, matching the 40mm bore, 135mm stroke, PT ports, and the -S magnet requirement.
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 SAI40 Standard Air Cylinder SAI40BX135S FAQ
This 40mm bore cylinder provides 628N of push force and 528N of pull force at 0.5MPa. At 0.7MPa, the push force increases to 879N.
Yes, the SAI series is dimensionally interchangeable per ISO 15552. You can use existing mounting accessories like LB foot brackets or FA flanges. Note that this specific 135mm stroke is a non-standard, made-to-order length.
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