Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-30S 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 SAIJ40BX260-30S
The AirTAC SAIJ40X260-30-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 230-260 mm usable travel window by allowing you to trim the nominal 260 mm stroke back by up to 30 mm. The SUS304 stainless steel rod and PT tapered port threads equip this unit for demanding environments, while the 16 mm rod and M12x1.25 thread handle robust side loads.
Delivering 879 N of push force at 0.7 MPa, this bore size steps up effectively from the 32 mm variant. The -S magnet enables precise position detection with CMSE reed and DMSE electronic sensors. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-30S |
|---|---|
| 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 SAIJ40BX260-30S
| 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 SAIJ40BX260-30S Is Used
Machine Changeover
Dial in the exact retract position within the 230-260 mm window when switching product sizes on a packaging line, eliminating the need to swap cylinders.
End-Position Tuning
Fine-tune the final end stop during initial commissioning to absorb mechanical tolerances and achieve precise seating of parts.
Variable Diverter Stroke
Adjust the stroke length on a sorting diverter arm to handle different carton widths without reprogramming the motion controller.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-30S the Right Cylinder?
Select this 40 mm bore cylinder when an application requires 879 N push force at 0.7 MPa, bridging the gap between the 32 mm (563 N) and 50 mm (1374 N) options. The adjustable stroke is chosen over a fixed SAI cylinder when you need to fine-tune the retract end position during machine commissioning or product changeover without adding external stops. Because the 260 mm stroke exceeds the 300 mm threshold guide threshold, an external guide is recommended for long unsupported loads.
The rear adjuster acts solely as a travel stop to set deceleration, not as a lock. For load-holding without live air pressure, consider the SAIL or BSAI series. This SAIJ40X260-30-S is dimensionally interchangeable per ISO 15552, featuring a PT port, SUS304 rod, and the -S magnet for CMSE / DMSE sensors.
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 SAIJ40BX260-30S FAQ
At a 0.7 MPa operating pressure, this 40 mm bore double-acting cylinder generates 879 N of push force and 724 N of pull force. It can deliver up to 1130 N push force at 0.9 MPa.
The rear adjuster screw allows you to mechanically shorten the effective stroke from the nominal 260 mm down to 230 mm. This provides a 30 mm tuning window to set the exact retract end position without changing the cylinder or adding external stops.
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