Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100S
The AirTAC SAIJ40X900-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 900 mm nominal stroke that can be dialed back by up to 100 mm, yielding an 800-900 mm usable travel window for precise end-position tuning. In the 40 mm bore class, it generates 628 N of push force and 528 N of pull force at 0.5 MPa.
This configuration features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. The extruded aluminum barrel incorporates sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. Air cushioning at both ends manages deceleration across its 30-800 mm/s speed range.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 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 SAIJ40BX900-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | 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 SAIJ40BX900-100S Is Used
Machine Changeover
Dial in the 800-900 mm travel window during product size transitions without swapping out the entire actuator assembly.
Variable End Stops
Set precise retract positions for different package lengths on a packaging line using the rear adjusting screw.
Commissioning Calibration
Fine-tune the end-of-stroke position during initial setup to align tooling perfectly, avoiding the need for external shims.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX900-100S the Right Cylinder?
Choose this adjustable-stroke model when an application requires fine-tuning the retract end-position during commissioning or product changeovers without physically swapping the cylinder or adding external stops. If your process demands higher force, stepping up to the 50 mm bore yields 982 N of push force at 0.5 MPa; stepping down to the 32 mm bore provides 402 N.
Because the 900 mm stroke is substantial, an external guide is highly recommended to prevent excessive side-loading on the 16 mm rod and M12x1.25 rod thread. To replace this cylinder with an ISO 15552 equivalent, match the 40 mm bore, 900 mm stroke, 100 mm adjustment, PT G1/4 port, and the -S magnet. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ40BX900-100S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 100 mm. This creates a usable travel window of 800-900 mm, letting you fine-tune the end position at commissioning without changing the cylinder.
At an operating pressure of 0.5 MPa, the SAIJ40X900-100-S provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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