Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30S 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 SAIJ40BX225-30S
The AirTAC SAIJ40X225-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 225 mm stroke that can be fine-tuned backward by up to 30 mm, creating a precise 195-225 mm usable travel window. Delivering 879 N of pull force at 0.7 MPa, it integrates a SUS304 stainless steel rod and a PT tapered port thread for robust, corrosion-resistant performance.
This adjustable-stop design allows you to dial in exact end positions during commissioning without swapping out the physical cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and because this SKU includes a magnet, it supports direct mounting of AirTAC CMSE reed and DMSE electronic solid-state switches for precise position feedback.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30S |
|---|---|
| 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 SAIJ40BX225-30S
| 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 SAIJ40BX225-30S Is Used
Machine Changeovers
Dial in the 195-225 mm travel window during product size transitions without physically swapping the actuator or adding external stopper blocks.
End-Position Tuning
Fine-tune the retract end position at machine commissioning to absorb mechanical tolerances and achieve precise seating of the 40 mm bore tooling.
Stainless Rod Assembly
Leverage the SUS304 stainless steel rod and 879 N pull force for reliable clamping in environments where minor position adjustments are frequently required.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX225-30S the Right Cylinder?
Choose this 40 mm bore when you need 879 N of pull force at 0.7 MPa, stepping up from a 32 mm bore that yields 563 N. The 30 mm adjustment range is ideal for product changeovers on a line, letting you shift the retract end-stop without buying a new actuator. For any holding requirements without live air pressure, note that this rear adjuster acts only as a travel stop and does not function as a lock; you would need to specify an SAIL or BSAI cylinder instead.
Because the 225 mm stroke exceeds 300 mm is false here, but for longer unsupported strokes, an external guide is recommended to prevent rod side-loading. To match this ISO 15552 cylinder for a replacement, verify the 40 mm bore, 225 mm stroke, 30 mm adjustment, PT port, SUS304 (B) rod material, and the -S magnet option.
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 SAIJ40BX225-30S FAQ
It features a rear adjusting screw that allows you to shorten the effective stroke by up to 30 mm. This creates a usable travel window of 195 to 225 mm, enabling fine-tuning of the end position without changing the cylinder.
At an operating pressure of 0.7 MPa, the SAIJ40X225-30-S provides 879 N of push force and 628 N of pull force. It operates efficiently at speeds between 30 and 800 mm/s.
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