Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 25mm 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
- Stroke25 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10
The AirTAC SAIJ125X25-10 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 robust 32mm SUS420J2 stainless steel rod and PT tapered G1/2 ports. By integrating an external stopper at the rear, this model allows you to fine-tune the end position at commissioning, creating a precise 15-25mm usable travel window from its 25mm nominal stroke.
Because the adjuster acts solely as a travel stop and not a lock, it will not hold a load without live air pressure. For secure load-holding, an external rod lock or related series like SAIL or BSAI is required. This cylinder uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 SAIJ125AX25-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SAIJ125AX25-10 Is Used
Product Changeover
Dial in the 15-25mm travel window during product size changes without physically swapping the cylinder or adding external shims.
Commissioning Calibration
Use the rear stopper to precisely set the retracted end position during initial machine setup, absorbing impact via the 40mm cushion.
Heavy-Duty Positioning
Leverage the 6136N push force to move heavy jigs into their final retracted stop position reliably on the assembly floor.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX25-10 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder lacks thrust; stepping up provides 6136N push force at 0.5 MPa compared to the 80mm bore's 2513N. An adjustable stroke is ideal for machine changeovers where a variable end-stop is needed, allowing you to dial in the exact position without swapping out a fixed-stroke SAI cylinder. When matching ISO 15552 replacements, confirm the 25mm stroke, 10mm adjustment, PT port thread, and mounting type. Since the stroke is under 300mm, side-load stress is minimal, but always guide long unsupported loads.
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 SAIJ125AX25-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the 25mm nominal stroke down to 15mm. This creates a 15-25mm usable travel window for fine-tuning the retract end position without replacing the cylinder.
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