Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100 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 SAIJ40BX225-100
The AirTAC SAIJ40X225-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 225 mm stroke by up to 100 mm. This creates a highly flexible 125-225 mm usable travel window, letting you fine-tune the retract end position at commissioning without swapping out the barrel or adding external mechanical stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This specific SKU is configured with a SUS304 stainless steel rod (option B) for superior moisture and corrosion resistance, alongside PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear adjuster functions strictly as a travel stop to set deceleration, not as a lock, so live air pressure is required to hold the load.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100 |
|---|---|
| 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 SAIJ40BX225-100
| 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 SAIJ40BX225-100 Is Used
Machine Changeover
Rapidly adapt the retract stroke from 225 mm down to 125 mm when switching a packaging line to a smaller carton format, eliminating the need to physically swap cylinders.
End-Position Tuning
Dial in the exact clamping or pressing depth during commissioning using the rear stopper screw, ensuring perfect contact without relying on external spacers.
Variable Product Sorting
Adjust the actuation distance on the fly for a conveyor diverter handling different package lengths, using the 100 mm travel window to accommodate multiple product sizes.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-100 the Right Cylinder?
Choose this 40 mm bore when your application requires roughly 628 N of push force at 0.5 MPa, which sits neatly between the lighter 32 mm bore (402 N) and the heavier 50 mm bore (982 N). The massive 100 mm adjustment range is ideal for machines processing varying product sizes, allowing the retract end-stop to be reconfigured on the fly instead of fabricating new hard stops. If your process demands positive load-holding without live air pressure, this standard SAIJ adjuster will not suffice; you should instead explore the SAIL pneumatic lock or BSAI clamp-lock series.
When replacing an ISO 15552 cylinder, match these exact parameters: 40 mm bore, 225 mm stroke, 100 mm adjustment range, PT tapered ports, and no internal magnet. Because the 225 mm stroke is relatively long, the 16 mm diameter rod and M12x1.25 rod thread provide robust guidance, but an external guide rail is still recommended to prevent side-loading damage on the unsupported load. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
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 SAIJ40BX225-100 FAQ
At a standard 0.5 MPa operating pressure, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 879 N.
The rear of the cylinder features an external stopper screw that allows you to reduce the effective stroke from its nominal 225 mm down to as little as 125 mm. This provides a 125-225 mm adjustable travel window for fine-tuning the end position without changing the cylinder itself.
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