Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 140mm 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
- Stroke140 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10S
The AirTAC SAIJ125X140-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and a built-in magnet for position sensing. The integrated rear stopper allows you to trim the effective travel, providing a usable stroke window of 130-140mm for precise end-position tuning without adding external stops.
This bore utilizes a PT tapered G1/2 port and operates at speeds of 30-500mm/s. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. The -S magnet functions seamlessly with AirTAC CMSE reed and DMSE electronic sensors fitted into the dual side sensor grooves on the extruded aluminum barrel.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 140 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 SAIJ125AX140-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×140 | 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 SAIJ125AX140-10S Is Used
Product Size Changeovers
Dial in the 130-140mm travel window instantly on packaging lines when switching container sizes, avoiding mechanical rebuilds.
Machine Setup Calibration
Fine-tune the retract end-position at commissioning using the rear stopper to achieve exact clamping depth without shimming.
Heavy Payload Positioning
Leverage the 6136N push force to move heavy assemblies, using the adjustable stop to prevent over-travel during indexing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX140-10S the Right Cylinder?
Choose this 125mm bore when an 80mm bore (2513N push at 0.5 MPa) lacks the thrust for heavy payloads, but a 160mm bore (10053N) would be excessive. The 10mm adjustable window is perfect for dialing in exact end-stops during machine setup or product changeovers, offering flexibility a fixed-stroke SAI cylinder cannot match. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For dead-load holding, select an SAIL or BSAI cylinder.
To replace an ISO 15552 cylinder, match the 125mm bore, 140mm nominal stroke, 10mm adjustment, PT G1/2 port, and desired mounting bracket. Since the 140mm stroke is under 300mm, side-load stress is minimal, but always ensure the SUS420J2 rod is properly aligned to maximize seal life.
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 SAIJ125AX140-10S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the 140mm nominal stroke by up to 10mm. This creates a 130-140mm usable travel window for fine-tuning the end position without swapping the cylinder.
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