Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 160mm 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
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-40
The AirTAC SAIJ40X160-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 628N of push force and 528N of pull force at 0.5 MPa, providing a robust solution for mid-range pneumatic tasks. By turning the external adjustment screw, you can shorten the effective travel from its 160mm nominal length down to 120mm, creating a 40mm usable window for precise end-position tuning during commissioning.
This unit features a SUS304 stainless steel rod (option B) for superior corrosion resistance and is equipped with PT tapered port threads (G1/4). The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. The rear adjuster functions purely as a travel stop to set deceleration, not as a lock, so live air is required to hold the load.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 160 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 SAIJ40BX160-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 SAIJ40BX160-40 Is Used
Machine Changeover
Dial in the exact end-stop between 120 and 160mm when switching product sizes on a packaging line, avoiding the need to physically swap cylinders or add external shims.
End-Position Tuning
Fine-tune the retract stroke during initial commissioning to absorb mechanical tolerances and ensure precise placement of 40mm bore tooling.
Variable Diverter Stops
Adjust the travel window on the fly for conveyor diverters handling different package lengths, using the rear screw to set the exact stopping point.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-40 the Right Cylinder?
Choose this 40mm bore when you need more thrust than the 32mm version (402N push at 0.5 MPa) but want a smaller footprint than the 50mm bore (982N push). The 40mm adjustment range is selected when a machine setup requires significant variability in the end-stop position without swapping out the entire cylinder body. Because the nominal stroke is 160mm, which is below the 300mm threshold, side-load risks are moderate, but an external guide remains recommended for heavy lateral loads. For applications requiring true load-holding without continuous air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants instead of relying on the adjuster.
To replace this unit on an ISO 15552 footprint, match the 40mm bore, 160mm nominal stroke, 40mm adjustment range, PT G1/4 port, and the selected mounting style. This configuration does not include a magnet, so position sensing via CMSE or DMSE switches is not supported without upgrading to an -S model.
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 SAIJ40BX160-40 FAQ
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke back by up to 40mm. This creates a usable travel window between 120mm and 160mm, allowing you to fine-tune the end position without changing the cylinder.
At 0.5 MPa operating pressure, it provides 628N of push force and 528N of pull force. At 0.9 MPa, the push force increases to 1130N.
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