Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-10
The AirTAC SAIJ40X350-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 350mm nominal stroke by up to 10mm. This creates a precise 340-350mm usable travel window for fine-tuning end positions at commissioning without adding external stops. It delivers 879N of push force at 0.7 MPa and features a SUS304 stainless steel rod for superior corrosion resistance.
Unlike a fixed-stroke SAI, this adjustable variant lets you set the retract end-stop during machine changeovers. The rear adjuster acts only as a travel stop and works alongside the 30mm variable air cushions at both ends to decelerate the load; neither holds the load without live air pressure. For position holding without continuous air, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAIJ40BX350-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SAIJ40BX350-10 Is Used
Machine Changeover
Dial in the 340-350mm travel window during product size changes without physically swapping the cylinder or re-engineering fixed external stops.
Variable End Stops
Precisely set the retract position for indexing or pushing parts on a conveyor, using the rear screw to fine-tune the 350mm stroke.
Assembly Calibration
Adjust the end-stop during initial commissioning to perfect the positioning of a tooling head, compensating for mechanical tolerance stack-up.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-10 the Right Cylinder?
Choose this 40mm bore when your application requires 628N push force at 0.5 MPa and needs exact end-position tuning during setup. If you need higher force, stepping up to the 50mm bore yields 982N at 0.5 MPa. Because the 350mm stroke is relatively long for the 16mm rod diameter, an external guide is recommended to prevent side-load damage. To match this ISO 15552 replacement exactly, specify the 40mm bore, 350mm stroke, 10mm adjustment, PT tapered ports, SUS304 rod material, and no magnet.
The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. It operates at speeds of 30-800 mm/s.
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 SAIJ40BX350-10 FAQ
The 40mm bore generates 628N of push force and 528N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw lets you shorten the 350mm nominal stroke by up to 10mm, providing a 340-350mm travel window. It acts as a mechanical stop to fine-tune the end position, but it is not a lock and will not hold the load without live air pressure.
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