Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-30
The AirTAC SAIJ125X125-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. This mechanism allows you to fine-tune the effective travel down to a 95-125 mm window without adding external stops. Delivering 6136 N of push force at 0.5 MPa, it is built for heavy-duty positioning. The extruded aluminum barrel includes dual sensor grooves, and this specific configuration uses a SUS420J2 stainless steel rod (material code A) for enhanced durability against moisture.
The rear adjuster functions purely as a mechanical travel stop to set the retract end-position and relies on the integrated variable air cushions for deceleration. It does not lock or hold the load without continuous live air pressure. For load-holding requirements without air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125AX125-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SAIJ125AX125-30 Is Used
Variable End-Stop Tooling
Dial in the exact retract distance within the 95-125 mm window during machine setup to accommodate varying workpiece sizes without changing the cylinder.
Product Changeover Systems
Quickly reconfigure the stroke end-position on packaging lines handling different carton lengths, using the rear screw for rapid mechanical adjustment.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to shift heavy pallets or fixtures into place, relying on the adjustable stop for precise final placement.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-30 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (providing 3927 N push at 0.5 MPa) lacks the necessary thrust for your tooling. The adjustable 95-125 mm window is ideal for product changeovers where exact end-of-stroke positioning varies slightly between batches, eliminating the need to physically swap out a fixed-stroke SAI cylinder. When integrating this ISO 15552 interchangeable unit, match the PT tapered port, the 30 mm adjustment code, and your required mounting option from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 125 mm bore operates at 30-500 mm/s, ensure your flow controls are correctly sized.
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 SAIJ125AX125-30 FAQ
At 0.5 MPa operating pressure, the 125 mm bore generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster screw allows you to trim the nominal 125 mm stroke back by up to 30 mm, creating a usable travel window of 95 to 125 mm. This stop only sets the end position and does not hold the load without live air.
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