Airtac SAIJ125 Adjustable Cylinder SAIJ125AX270-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX270-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX270-30
The AirTAC SAIJ125X270-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the nominal 270 mm travel back by up to 30 mm, creating a precise 240-270 mm usable window. This on-machine fine-tuning eliminates the need to swap cylinders or bolt on external stops during product changeovers. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning with ease.
This specific SKU is configured with an SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this unit ships without a magnet. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX270-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX270-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 270 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 SAIJ125AX270-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SAIJ125AX270-30 Is Used
Machine Setup & Changeover
Dial in the exact 240-270 mm end position during machine changeovers without machining new stopper blocks.
Variable End-Stop Positioning
Accommodate slight variations in product length on the line by tweaking the rear 30 mm adjustment screw.
Heavy-Duty Clamping
Leverage 6136 N of push force at 0.5 MPa for secure clamping of large metal or composite parts.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX270-30 the Right Cylinder?
Choose this 125 mm bore when your application requires substantial thrust—stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N, while this model provides 6136 N. The adjustable stroke is ideal for commissioning setups where the exact end-of-stroke position varies by a few millimeters. For holding loads safely without continuous air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) series, as the SAIJ adjuster is not a brake. When matching ISO 15552 interchangeability, confirm the 125 mm bore, 270 mm stroke, 30 mm adjustment, PT G1/2 port, and your required mounting bracket from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ125AX270-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder 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 lets you shorten the 270 mm nominal stroke by up to 30 mm, providing a usable travel window of 240-270 mm. It functions as a mechanical stop to fine-tune the retract position and is not a lock.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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