Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40S 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 SAIJ40BX260-40S
The AirTAC SAIJ40X260-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 220 to 260 mm, letting you dial in the exact retract position during commissioning without adding external stops. The 40 mm bore generates 628 N of push force and 528 N of pull force at 0.5 MPa.
This variant uses a SUS304 stainless steel piston rod for corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. It carries PT tapered ports and reaches speeds of 30 to 800 mm/s. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40S |
|---|---|
| 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 SAIJ40BX260-40S
| 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 SAIJ40BX260-40S Is Used
Machine Changeover
Quickly fine-tune the retract end-position by up to 40 mm when switching product sizes on a packaging line, eliminating the need to swap cylinders.
Commissioning Calibration
Dial in the exact 220 to 260 mm travel window during initial setup to perfectly align tooling without machining custom external spacers.
Variable End Stops
Provide adjustable physical stops for assembly processes that require slight positional shifts between production runs.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX260-40S the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end positions or frequent product changeovers, rather than a fixed-stroke SAI cylinder. If you need higher force, stepping up to the 50 mm bore yields 982 N of push force at 0.5 MPa. Because the 260 mm stroke exceeds 300 mm is not the case here, but the 16 mm rod and M12x1.25 thread still handle moderate side loads; always use an external guide for long unsupported travels.
To match this ISO 15552 cylinder dimensionally, specify a 40 mm bore, 260 mm nominal stroke, 40 mm adjustment range, PT ports, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR. For load-holding without live air, select a SAIL or BSAI cylinder instead, as this adjuster is not a lock.
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 SAIJ40BX260-40S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw lets you shorten the effective stroke from the nominal 260 mm down to 220 mm. This creates a 220-260 mm adjustable travel window for fine-tuning the end position at commissioning, but the adjuster acts only as a stop and does not lock the load.
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