Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-40S
The AirTAC SAIJ40X145-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the travel window from 105 to 145 mm during commissioning. Delivering 628 N of push force and 528 N of pull force at 0.5 MPa, it fits neatly into the 40 mm bore class. The extruded aluminum barrel features sensor grooves on both sides, and this -S variant includes a magnet for use with AirTAC CMSE reed and DMSE solid-state sensors.
This model is specified with a SUS304 stainless steel rod (code B) for superior corrosion resistance and features PT tapered port threads (G1/4). The rear adjustment screw acts purely as a mechanical stop to trim the retract end-position; it does not lock the load without live air pressure. For applications requiring true load-holding, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 145 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 SAIJ40BX145-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×145 | 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 SAIJ40BX145-40S Is Used
Changeover Calibration
Dial in the exact retract distance from 105 to 145 mm during product line changeovers without adding external stopper blocks.
End-Stop Trimming
Fine-tune the final end-position at machine commissioning to compensate for mechanical wear or sensor drift.
Variable Size Handling
Adjust the cylinder travel on the fly to accommodate varying package or part sizes on the same conveyor line.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-40S the Right Cylinder?
Choose this 40 mm bore when you need precise end-position tuning without swapping cylinders, stepping up from a 32 mm bore (402 N push at 0.5 MPa) for higher thrust, or down from a 50 mm bore (982 N push) to save space. The adjustable stroke is ideal for machine changeovers where the exact retract distance varies by product size. Because the total stroke is 145 mm, side-load risks are moderate, but long unsupported loads should still use an external guide.
When matching an ISO 15552 replacement, verify the 40 mm bore, 145 mm nominal stroke, 40 mm adjustment range, PT port thread, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found on some standard cylinders.
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 SAIJ40BX145-40S FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 40 mm, providing a usable travel window of 105 to 145 mm. It functions as a mechanical stop to set the end-position and does not lock the load without continuous air pressure.
At 0.5 MPa operating pressure, it provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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