Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10S 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 SAIJ40BX135-10S
The AirTAC SAIJ40X135-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 125-135 mm usable travel window. Delivering 879 N of push force at 0.7 MPa, it handles medium-duty positioning. The barrel is extruded aluminum with sensor grooves on both sides, distinguishing it from tie-rod builds.
This variant uses a SUS304 stainless steel rod for corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. The rear stopper allows fine end-position tuning at commissioning without swapping the cylinder. The adjuster acts only as a travel stop, not a lock, so it cannot hold loads without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10S |
|---|---|
| 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 SAIJ40BX135-10S
| 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 SAIJ40BX135-10S Is Used
Machine Changeover
Dial in the 125-135 mm end-stop during product size transitions without adding external physical stops to the frame.
End-Position Tuning
Fine-tune the retract stroke at commissioning to absorb mechanical tolerances in a new assembly fixture.
Variable Retract Stop
Set precise retract endpoints for clamping or pressing tasks where the exact 10 mm travel trim is critical.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX135-10S the Right Cylinder?
Choose this 40 mm bore when 628 N at 0.5 MPa is insufficient, or step down to a 32 mm bore (402 N at 0.5 MPa) for lighter loads. An adjustable stroke is ideal for variable end-stops during machine changeover, whereas a fixed SAI cylinder suits set travels. To replace an ISO 15552 unit, match the 135 mm stroke, 10 mm adjuster, PT tapered ports, Basic/LB/TC/FA/FTC/TCM1/TCM2 mounts, and the -S magnet. For loads over 300 mm, external guides are recommended to prevent side-load wear on the 16 mm rod.
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 SAIJ40BX135-10S FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. Maximum thrust is 128 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the nominal 135 mm stroke by up to 10 mm, creating a 125-135 mm travel window. It functions as a mechanical stop and does not lock the load without air pressure.
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