Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-75S
The AirTAC SAIJ125X145-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force and 5734N of pull force at 0.5 MPa. Because this specific SKU carries a 75mm adjustment code on a 145mm nominal stroke, you can dial the effective travel back to anywhere in a 70-145mm window during commissioning. This prevents the need to physically swap out the entire cylinder when tuning end positions or accommodating a new product size on the line.
Built with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance, this unit includes a magnet (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides, and the rear screw acts purely as a travel stop to set the retract end position without functioning as a load lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | 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 SAIJ125 Adjustable Cylinder SAIJ125AX145-75S Is Used
Product Changeovers
Dial in the 70-145mm travel window during format size changes on a packaging line without physically replacing the actuator.
Machine Setup Tuning
Fine-tune the retract end-stop during initial commissioning to perfect the seating force of large 6136N pressing operations.
Variable End Stops
Create adjustable mechanical limits for automated assembly tooling that processes multiple part families on the same fixture.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-75S the Right Cylinder?
Selecting this 125mm bore cylinder makes sense when your application requires the substantial thrust of a larger rod but still demands precise end-position tuning; if you need less force, stepping down to a 100mm bore yields 3927N push at 0.5 MPa. Choose this adjustable-stroke SAIJ over a fixed SAI model when you anticipate frequent product changeovers or need to fine-tune the retract distance on the fly. For load-holding without live air pressure, note that this cylinder's rear adjuster is only a stop, so you must integrate an external rod lock or explore the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 125mm bore, 145mm stroke, 75mm adjustment, PT tapered port threads, and the -S magnet requirement. This SAIJ model supports a mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR brackets. Since the 145mm stroke is below the 300mm threshold, external side-load guides are less critical here, but the robust 32mm rod and M27x2 thread still handle high mechanical stress effectively.
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 SAIJ125 Adjustable Cylinder SAIJ125AX145-75S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. If operated at 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the 145mm nominal stroke by up to 75mm, creating a usable travel window of 70-145mm. The adjuster acts as a mechanical stop to fine-tune the end position and does not lock the load without live air.
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