Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50S
The AirTAC SAIJ125X130-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits you to trim the nominal 130 mm travel back by up to 50 mm. This yields a usable end-position window of 80-130 mm, granting you exact control over the retract stop during commissioning or product-size changeovers without swapping out the unit. The extruded aluminum barrel strictly avoids tie-rod construction, maintaining a dimensionally interchangeable ISO 15552 mounting interface.
Delivering 6136 N of push force and 5734 N of pull force at 0.5 MPa, this bore size handles heavy industrial loads. It incorporates a SUS420J2 stainless steel rod for heightened corrosion resistance and utilizes PT tapered port threads. The integrated magnet (-S) directly supports AirTAC CMSE reed and DMSE electronic sensors, which seat neatly into the dual-side sensor grooves on the barrel.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125AX130-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125AX130-50S Is Used
Product Changeover
Dial in the 80-130 mm travel window on the fly to accommodate varying package sizes on a packaging line without physically replacing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to perfect pressing or clamping depth without adding external mechanical stops.
Heavy-Duty Forming
Leverage the 6136 N push force at 0.5 MPa for robust forming or holding tasks, relying on the SUS420J2 rod to withstand harsh industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50S the Right Cylinder?
Select this 125 mm bore actuator when an application requires substantial thrust—stepping down to a 100 mm bore drops the push force to 3927 N at 0.5 MPa, while moving up to a 160 mm bore increases it to 10053 N. The adjustable stroke is chosen over a fixed SAI model when you need variable end stops for machine setup or adapting to different product sizes on a line. The rear adjuster acts purely as a travel stop to set deceleration endpoints; it does not hold the load without live air. For true load-holding without continuous pressure, consider an SAIL pneumatic lock, a BSAI clamp-lock, or an external rod lock.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 130 mm nominal stroke, 50 mm adjustment range, PT port threads, and the -S magnet requirement. Ensure your mounting choice falls within the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Because the 130 mm stroke is relatively short, side-load risks are minimal, but always guide heavy unsupported loads externally. The operational speed range for this bore is 30-500 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 SAIJ125 Adjustable Cylinder SAIJ125AX130-50S FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the nominal 130 mm stroke by up to 50 mm, creating a usable travel window of 80-130 mm. This stopper fine-tunes the end position but does not lock the load without continuous air pressure.
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