Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-75
The AirTAC SAIJ40X290-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 628N of push force at 0.5 MPa. Its defining feature is a 75mm adjustment range that creates a usable travel window between 215 and 290mm. This allows you to fine-tune the retract end position at commissioning without swapping hardware.
This SKU features a SUS304 stainless steel rod for superior corrosion resistance. It uses a PT tapered port thread and operates without a magnet. The extruded aluminum barrel includes sensor grooves on both sides, and the rear stopper acts purely as a travel end deceleration point, not a load-holding lock.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 290 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 SAIJ40BX290-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×290 | 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 SAIJ40BX290-75 Is Used
Variable End Stops
Dial in the exact retract position within the 215-290mm window during machine setup to accommodate different material lengths without adding external stopper blocks.
Product Changeover
Quickly reconfigure the stroke length on packaging lines when switching between product sizes, using the rear screw to set the new end-of-travel point.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive industrial settings where standard carbon steel rods would degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-75 the Right Cylinder?
Choose this 40mm bore when you need more force than the 32mm version (402N push at 0.5 MPa) but want a more compact footprint than the 50mm option (982N). The 75mm adjustment window is ideal for product-size changeovers on a line, providing variable end stops without external stops. For load-holding without live air pressure, you would need a SAIL or BSAI cylinder, as this adjuster is only a stop.
When replacing an ISO 15552 cylinder, match the 40mm bore, 290mm nominal stroke, 75mm adjustment, PT G1/4 port, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 290mm stroke is relatively long, ensure adequate external guide support to prevent excessive side-loading on the SUS304 rod.
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 SAIJ40BX290-75 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw allows you to shorten the effective stroke by up to 75mm, creating a usable travel window of 215 to 290mm. It acts as a mechanical stop to decelerate the piston and cannot hold the load without continuous air pressure.
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