Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10 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 a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke135 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10
The AirTAC SAIJ40X135-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 125 to 135 mm, allowing you to fine-tune the end position at commissioning without adding external stops. In the 40 mm bore class, it delivers 879 N of push force and 528 N of pull force at 0.7 MPa.
This unit is built with a SUS304 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threading. The extruded aluminum barrel includes sensor grooves on both sides, and while no magnet is specified for this configuration, the grooves remain ready for future sensor integration.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10 |
|---|---|
| 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 SAIJ40 Adjustable Cylinder SAIJ40BX135-10
| 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 SAIJ40 Adjustable Cylinder SAIJ40BX135-10 Is Used
Machine Changeover
Dial in the exact 125-135 mm travel window during product size transitions without physically replacing the cylinder.
End-Position Tuning
Fine-tune the retract stopper during initial commissioning to perfect the seating position of moving tooling.
Assembly Line Setup
Establish precise variable end stops for automated equipment that requires frequent mechanical adjustments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke cylinder when you need precise retract-end tuning during machine setup or product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. If your application requires higher force, stepping up to the 50 mm bore yields 1374 N of push force at 0.7 MPa.
As an adjustable stop, the rear screw decelerates and sets the travel end but does not hold the load without live air pressure. For true load-holding without continuous air, consider an external rod lock or the AirTAC SAIL or BSAI series. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports a mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX135-10 FAQ
The rear adjuster acts as an external stopper that lets you shorten the effective stroke by up to 10 mm. This creates a usable travel window of 125 to 135 mm, allowing precise end-position tuning without swapping the cylinder.
At 0.7 MPa operating pressure, the SAIJ40X135-10 provides 879 N of push force and 528 N of pull force. The maximum operating pressure is 1.0 MPa.
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