Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-10S
The AirTAC SAIJ40X240-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 230 to 240 mm. It delivers 628 N of push force at 0.5 MPa, scaling up to 1130 N at 0.9 MPa, making it well-suited for medium-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for straightforward detection.
This specific SKU is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state sensors. It features a PT tapered port thread and uses an M12x1.25 rod thread. The rear adjuster acts strictly as a mechanical stop to dial in the end position during commissioning without swapping the cylinder.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 240 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 SAIJ40BX240-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×240 | 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 SAIJ40BX240-10S Is Used
Product Changeover
Dial in the 230-240 mm travel window during format changes on a packaging line without replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stroke end during machine commissioning to perfectly align a 628 N push operation, absorbing mechanical tolerance variations.
Corrosive Environments
Leverage the SUS304 stainless steel rod and adjustable stroke for repeatable positioning in washdown or mildly corrosive manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX240-10S the Right Cylinder?
Choose this adjustable-stroke SAIJ over a fixed SAI when your machine setup requires precise end-position tuning or product changeover flexibility without bolting on external stops. If your application requires less force, stepping down to a 32 mm bore yields 402 N of push force at 0.5 MPa. Conversely, a 50 mm bore provides 982 N for heavier loads.
Because the nominal stroke is 240 mm, ensure adequate guidance to prevent side-loading damage to the M12x1.25 rod. Remember that the rear adjuster is a travel stop, not a lock; the SAIJ40X240-10-S will not hold a load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series. This cylinder uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable per ISO 15552.
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 SAIJ40BX240-10S FAQ
The rear adjuster screw lets you shorten the effective travel by up to 10 mm, creating a 230-240 mm usable window. It acts as a mechanical stop to fine-tune the retract end position without swapping cylinders.
At 0.5 MPa operating pressure, it provides 628 N of push force and 528 N of pull force. At 0.9 MPa, the push force increases to 1130 N.
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