Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 240mm 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
- Stroke240 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-100
The AirTAC SAIJ125X240-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers robust thrust with 6136N pull force at 0.5MPa, making it ideal for heavy-duty positioning. The built-in adjuster allows you to trim the effective travel anywhere within a 140 to 240mm usable window, providing exact end-position tuning without adding external stops.
This unit is configured with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for AirTAC CMSE reed and DMSE solid-state switches if position feedback is added later. The rear adjuster acts purely as a travel stop to set deceleration limits and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 240 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 SAIJ125AX240-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×240 | 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 SAIJ125AX240-100 Is Used
Product Changeover
Dial in the exact 140 to 240mm travel window during line size changes without physically swapping out the actuator.
End-Stop Tuning
Fine-tune the final retract position at machine commissioning using the rear screw, avoiding the need for external mechanical stops.
Heavy Pressing
Leverage the 6136N pull force at 0.5MPa for heavy-duty forming or pressing tasks that require precise depth control.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX240-100 the Right Cylinder?
Choose this 125mm bore adjustable-stroke model when your application requires high force (6136N pull at 0.5MPa) alongside flexible end-stop positioning. If your setup demands less thrust, stepping down to an 80mm bore yields 2268N pull, whereas moving up to a 160mm bore provides 9425N pull. The 100mm adjustment range is particularly valuable for product changeovers, allowing you to dial in the exact 140 to 240mm stroke window on the machine without swapping the cylinder.
For ISO 15552 interchangeability, verify the 125mm bore, 240mm stroke, 100mm adjustment range, PT G1/2 port, and the required mounting bracket (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Because the nominal stroke is 240mm, ensure proper guiding to prevent excessive side-loading on the 32mm rod. If your process requires the cylinder to hold its position without live air, the plain SAIJ adjuster will not act as a lock; consider the SAIL or BSAI series instead.
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 SAIJ125AX240-100 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of pull force and 8590N of push force. It can deliver up to 11045N push force at 0.7MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 240mm nominal stroke down to 140mm. It sets the end position and deceleration point, but it is not a lock and will not hold the load without continuous air pressure.
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