Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 225mm 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
- Stroke225 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30
The AirTAC SAIJ40X225-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 30 mm. This yields a usable stroke window of 195 to 225 mm, providing precise end-position tuning at commissioning without the need to swap out the entire barrel or bolt on external stops. Delivering 879 N of push force at 0.7 MPa, it is built with a SUS304 stainless steel rod and a PT tapered port thread for robust pneumatic connectivity.
This profile cylinder incorporates adjustable air cushions at both ends to manage deceleration, but it is crucial to note that the rear adjuster acts only as a travel stop, not a load-holding lock. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 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 SAIJ40BX225-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SAIJ40BX225-30 Is Used
Product Changeover
Dial in the 195-225 mm travel window during line changeovers to accommodate varying product sizes without physically replacing the actuator.
End-Position Tuning
Fine-tune the retract end-stop during initial commissioning to achieve exact positioning, eliminating the mechanical slop of external stops.
Deceleration Calibration
Pair the 30 mm rear mechanical stop with the integrated adjustable air cushion to precisely manage the kinetic energy of moving loads at the end of travel.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30 the Right Cylinder?
Choose this 40 mm bore when an application requires more thrust than a 32 mm bore (which provides 563 N at 0.7 MPa) but does not necessitate stepping up to a 50 mm bore (1374 N at 0.7 MPa). The adjustable stroke is ideal for machine setups requiring variable end stops or product changeovers, offering flexibility that a fixed-stroke SAI cylinder cannot provide. If your application demands load holding without live air pressure, this cylinder will not suffice; instead, consider the SAIL air-released lock or BSAI clamp-lock variants. For ISO 15552 replacement matching, ensure the 225 mm stroke, 30 mm adjustment range, PT port, and appropriate mounting accessories are specified.
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 SAIJ40BX225-30 FAQ
At an operating pressure of 0.7 MPa, the 40 mm bore generates 879 N of push force and 528 N of pull force. The maximum push force reaches 1130 N at 0.9 MPa.
The rear adjuster screw allows you to shorten the 225 mm nominal stroke by up to 30 mm, creating an effective travel window of 195 to 225 mm. This stopper sets the end position but does not lock the load without live air pressure.
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