Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-10 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 SAIJ125X270-10
The AirTAC SAIJ125X270-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 10 mm. This yields a precise 260-270 mm usable travel window, enabling exact end-position calibration at commissioning without external stops. In the 125 mm bore class, it delivers 6136 N of pull force at 0.5 MPa and reaches 11045 N at 0.9 MPa.
The standard carbon steel piston rod uses an M27x2 thread, providing a robust interface for heavier tooling, while the PT tapered port ensures a tight pneumatic connection. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback. It supports a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-10 |
|---|---|
| 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 SAIJ125X270-10
| 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 SAIJ125X270-10 Is Used
Product Changeover
Dial in the 260-270 mm travel window during packaging line format changes to accommodate varying carton sizes without swapping cylinders.
Machine Setup
Fine-tune the retract end-position at commissioning using the rear stopper, eliminating the need to bolt on external physical stops.
Variable End Stops
Adjust the stroke dynamically on automated assembly machinery to hit exact pressing depths for different component heights.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-10 the Right Cylinder?
Choose this 125 mm bore when your application requires substantial thrust—such as 6136 N pull at 0.5 MPa—and benefits from a 10 mm adjustable window for variable end stops during product changeover. If your process demands less force, stepping down to a 100 mm bore provides 3681 N of pull at 0.5 MPa, whereas moving up to a 160 mm bore yields 9425 N. The rear screw acts purely as a travel stop and cannot hold the load without live air pressure; for true fail-safe load holding, consider the SAIL or BSAI series. To match this ISO 15552 replacement, verify the 270 mm stroke, 10 mm adjustment, PT G1/2 port, and the required mounting bracket. Because the stroke is 270 mm, ensure an external guide is used if the load imposes significant side loading on the M27x2 rod.
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 SAIJ125X270-10 FAQ
At 0.5 MPa it provides 6136 N of pull force and 8590 N of push force. At 0.9 MPa, the push force reaches 11045 N.
A rear adjuster screw lets you shorten the 270 mm nominal stroke by up to 10 mm, creating a 260-270 mm travel window for fine-tuning without replacing the cylinder.
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Standard models usually ship in 3-4 days.
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