Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40
The AirTAC SAIJ40X165-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 40 mm. This creates a usable stroke window of 125 to 165 mm, letting you fine-tune the retract end position during commissioning without swapping out the cylinder or adding external stops. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
This configuration utilizes a SUS304 stainless steel rod (option B) for superior corrosion resistance and features PT tapered port threads with a G1/4 connection. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is specified without a magnet, meaning position sensing via CMSE or DMSE switches is not enabled out of the box.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 165 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 SAIJ40BX165-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×165 | 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 SAIJ40BX165-40 Is Used
Machine Changeover
Dial in the exact retract position between 125 and 165 mm during product size changes without replacing the cylinder or adding mechanical shims.
Variable End Stops
Provides a tunable physical stop for diverter arms or pushers on a packaging line, allowing quick mechanical adjustment at commissioning.
Corrosive Environments
The SUS304 stainless steel rod makes this adjustable cylinder suitable for light manufacturing areas where moisture or mild chemicals are present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX165-40 the Right Cylinder?
Choose this 40 mm bore when an application requires moderate force, delivering 628 N push at 0.5 MPa. If your setup demands higher thrust, stepping up to the 50 mm bore provides 982 N of push force. Conversely, lighter duties can utilize the 32 mm bore at 402 N. The adjustable stroke is particularly valuable for product changeovers on a line, allowing the end-stop to be dialed in precisely between 125 and 165 mm rather than machining custom spacers.
When integrating this cylinder, remember the rear adjuster acts strictly as a travel stop and does not hold the load without live air; for dead-load holding, consider an external rod lock or the AirTAC SAIL series. Because the stroke is 165 mm, side-load risks are moderate, but always ensure adequate external guiding for the payload. This model is dimensionally interchangeable per ISO 15552 and uses the standard SAIJ mounting subset (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR options.
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 SAIJ40BX165-40 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it can deliver up to 1130 N of push force.
The rear adjuster screw allows you to shorten the nominal 165 mm stroke by up to 40 mm, creating a usable travel window of 125 to 165 mm. The adjuster acts only as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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