Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30S
The AirTAC SAIJ40X40-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the 40 mm nominal travel by up to 30 mm, creating a precise 10-40 mm usable positioning window. It delivers a robust 628 N push force at 0.5 MPa, making it highly effective for mid-range actuation tasks.
This variant is equipped with a SUS304 stainless steel rod for superior corrosion resistance and includes an internal magnet (-S) for seamless integration with CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and fluid is supplied via a PT tapered G1/4 port.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAIJ40BX40-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SAIJ40BX40-30S Is Used
Machine Setup & Changeover
Fine-tune the 10-40 mm travel window during commissioning or product size changes on a line without physically swapping the actuator.
Variable End-Stop Positioning
Dial in the exact retract position required for delicate picking or pushing tasks where a fixed 40 mm stroke would be too abrupt.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod for reliable double-acting motion in washdown or mildly corrosive industrial settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30S the Right Cylinder?
Choose this 40 mm bore when you need more thrust than the 32 mm version (402 N push at 0.5 MPa) but want to avoid the larger footprint of a 50 mm cylinder. The adjustable stroke is ideal for machine setup and product changeover, letting you fine-tune the end position at commissioning without swapping the cylinder or adding external stops. For exact drop-in ISO 15552 replacement, match the 40 mm stroke, 30 mm adjustment, PT G1/4 port, and -S magnet.
Remember that the rear adjuster acts as a travel stop, not a lock; it cannot hold a load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series instead.
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 SAIJ40BX40-30S FAQ
The rear adjuster screw lets you shorten the effective travel by up to 30 mm from the 40 mm nominal stroke. This provides a 10-40 mm adjustable window to fine-tune the retract end position without adding external stops.
At 0.5 MPa operating pressure, it provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
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