Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-100S
The AirTAC SAIJ40X270-100-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 170 to 270 mm, allowing you to dial back the nominal 270 mm stroke by up to 100 mm during commissioning. Operating at 0.5 MPa, it delivers 628 N of push force and 528 N of pull force, making it well-suited for moderate-thrust positioning tasks.
This SKU is configured with a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes a magnet (-S) for position sensing. It supports AirTAC CMSE reed and DMSE electronic solid-state switches housed within the dual sensor grooves on its extruded aluminum barrel. The PT G1/4 port and M12x1.25 rod thread ensure standardized pneumatic and mechanical connections.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 270 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 SAIJ40 Adjustable Cylinder SAIJ40BX270-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×270 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX270-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract position from 170 to 270 mm during machine commissioning to perfectly align product stops without machining new mounting plates.
Product Changeover
Quickly adapt the stroke window on a packaging line when switching to a different carton size, using the 100 mm rear adjustment range to set new end positions.
Sensor-Verified Setup
Leverage the integrated -S magnet with CMSE or DMSE switches to confirm the adjusted end-of-stroke position, ensuring precise cycle completion before signaling the controller.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX270-100S the Right Cylinder?
Choose this 40 mm bore model when an application requires fine-tuning of the end-of-stroke position without swapping out the physical cylinder or adding bulky external stops. If your process demands less thrust, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa. Conversely, scaling up to a 50 mm bore provides 982 N.
Because the 270 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the M12x1.25 rod. Remember that the rear adjuster functions strictly as a travel stop and does not hold the load mechanically without live air pressure; for fail-safe load holding, consider an external rod lock, a pilot-operated check valve, or the AirTAC SAIL and BSAI clamp-lock variants. This cylinder is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
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 SAIJ40 Adjustable Cylinder SAIJ40BX270-100S FAQ
The rear adjuster screw acts as a mechanical stop that can shorten the effective stroke by up to 100 mm, giving a usable travel window of 170 to 270 mm. It allows you to fine-tune the end position at commissioning without changing the cylinder, but it does not lock the load without live air pressure.
At 0.5 MPa, this double-acting cylinder provides 628 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s and features a PT G1/4 port for pneumatic connections.
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