Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-10S 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 SAIJ40BX290-10S
The AirTAC SAIJ40X290-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 280-290 mm usable travel window, allowing you to dial back the 290 mm nominal stroke by up to 10 mm during machine commissioning. Delivering 879 N of push force at 0.7 MPa, it integrates a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread.
This unit includes a built-in magnet (-S) for position sensing with AirTAC CMSE reed or DMSE electronic solid-state switches, which seat neatly into the sensor grooves on both sides of the extruded aluminum barrel. The rear adjuster functions strictly as a travel stop to fine-tune the end position; it does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-10S |
|---|---|
| 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 SAIJ40BX290-10S
| 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 SAIJ40BX290-10S Is Used
Machine Commissioning
Dial in the exact 280-290 mm end position during setup without adding external stops or swapping cylinders.
Product Changeover
Quickly adjust the retract stop to accommodate slight length variations when switching product sizes on a line.
Corrosive Assembly
Leverage the SUS304 stainless steel rod for reliable actuation in environments requiring high corrosion resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-10S the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 879 N of push force at 0.7 MPa and benefits from micro-adjustments at the retract end. If your setup demands less force, the 32 mm bore offers 563 N at 0.7 MPa; for heavier loads, the 50 mm bore provides 1374 N. The 10 mm adjustment range is ideal for product changeovers where exact end-positioning varies slightly, eliminating the need to swap out a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 290 mm stroke, 10 mm adjustment, PT port thread, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Because the 290 mm stroke is relatively long, ensure adequate external guiding to prevent excessive side-loading on the 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 SAIJ40BX290-10S FAQ
At 0.7 MPa, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It operates at speeds between 30 and 800 mm/s.
The rear adjuster acts as a mechanical stop, allowing you to shorten the 290 mm nominal stroke by up to 10 mm, creating a 280-290 mm usable travel window. It only sets the end position and does not lock the load without live air.
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