Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100S 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 SAIJ40BX290-100S
The AirTAC SAIJ40X290-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force and 528N of pull force at 0.5 MPa, utilizing a G1/4 port. Because this specific SKU includes a 100mm adjustment range, you can dial the effective travel back from its 290mm nominal length, creating a precise 190-290mm usable window for variable product sizes.
This configuration features a SUS304 stainless steel rod (option B) for superior corrosion resistance and ships with a magnet (-S) for position sensing. You can drop AirTAC CMSE reed or DMSE electronic solid-state switches directly into the dual sensor grooves on the extruded aluminum barrel. The rear screw acts purely as a travel stop to fine-tune the retract end, meaning it will not hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100S |
|---|---|
| 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 SAIJ40BX290-100S
| 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 SAIJ40BX290-100S Is Used
Product Size Changeovers
Quickly adapt packaging lines to different carton lengths by dialing the stroke back within the 190-290mm window during machine setup.
End-Position Tuning
Fine-tune the retract distance at commissioning to achieve exact sensor triggering without fabricating custom external stopper blocks.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod for pushing or lifting tasks in washdown or mildly corrosive industrial areas.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX290-100S the Right Cylinder?
Choose this 40mm bore when an application demands the 628N push force at 0.5 MPa, but requires on-the-fly end-position tuning without swapping cylinders or adding external stops. If your setup requires less force, stepping down to a 32mm bore yields 402N; if you need more clamping power, a 50mm bore provides 982N. The adjustable stroke is ideal for machine changeovers, but remember the adjuster is a stop, not a lock. For dead-pilot or load-holding without continuous air, select a SAIL pneumatic lock or BSAI clamp-lock cylinder instead.
To match this exact ISO 15552 footprint for a direct replacement, specify a 40mm bore, 290mm nominal stroke, 100mm adjustment range, PT tapered port threads, and the -S magnet option. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. Since the 290mm stroke is relatively long, ensure you use an external guide to prevent excessive side-loading on the 16mm rod and M12x1.25 rod thread.
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 SAIJ40BX290-100S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 879N.
The rear adjuster screw lets you shorten the effective travel from the 290mm nominal stroke by up to 100mm, creating a 190-290mm usable window. It functions as a mechanical stop and does not lock the load without live air pressure.
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