Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 260mm 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
- Stroke260 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40
The AirTAC SAIJ40X260-40 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 260 mm stroke that can be dialed back by up to 40 mm, yielding a precise 220-260 mm usable travel window for fine-tuning end positions during commissioning. In the 40 mm bore class, it delivers 628 N of push force at 0.5 MPa and up to 1130 N at 0.9 MPa.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G1/4 connection. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is configured without a magnet. The rear adjuster acts purely as a mechanical stop to set the travel limit and does not lock or hold the load without continuous air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 260 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 SAIJ40BX260-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×260 | 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 SAIJ40BX260-40 Is Used
Machine Changeover
Dial in the 220-260 mm stroke window during product size changes to set new end positions rapidly without changing the cylinder.
End-Position Tuning
Fine-tune the retract stop at commissioning to resolve minor mechanical offsets without machining new spacer blocks.
Variable End Stops
Adjust the travel limit on the fly for sorting or diverting tasks that require slightly different reach distances.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40 the Right Cylinder?
Choose this 40 mm bore adjustable cylinder when an application requires exact end-position tuning without adding external stops or swapping components. If your setup needs less force, stepping down to a 32 mm bore yields 402 N at 0.5 MPa; stepping up to a 50 mm bore provides 982 N at 0.5 MPa. Because the total stroke is 260 mm, ensure adequate external guiding to prevent excessive side-loading on the rod.
For an exact ISO 15552 replacement, match the 40 mm bore, 260 mm stroke, 40 mm adjustment code, PT port thread, and standard mounting interface. The SAIJ series supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR options. Remember that the rear stopper only decelerates and sets the travel end; for load-holding without live air, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ40BX260-40 FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm. This creates a usable travel window of 220 to 260 mm, allowing you to set the exact retract end position without external stops.
At 0.5 MPa it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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