Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 160mm 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
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50S
The AirTAC SAIJ125X160-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 110 to 160 mm. Operating at 0.5 MPa, it delivers 6136 N of push force and 5734 N of pull force, making it suited for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and the integrated magnet (-S) supports position monitoring using AirTAC CMSE reed or DMSE electronic solid-state switches.
This model utilizes a carbon steel piston rod with an M27x2 thread and PT tapered ports. The rear adjuster functions strictly as a mechanical stop to fine-tune the retract end position during commissioning; it is not a locking device and will not hold a load without continuous live air pressure. Adjustable air cushions at both ends absorb kinetic energy, with the operating speed ranging between 30 and 500 mm/s.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 160 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 SAIJ125X160-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×160 | 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 SAIJ125X160-50S Is Used
Product Changeovers
Quickly dial the stroke back by up to 50 mm during format changes on a packaging line, accommodating different product sizes without replacing the cylinder.
Heavy Press Fitting
Leverage the 6136 N push force to seat heavy components, using the rear stopper to precisely limit the retract distance and prevent over-travel.
End-Stop Calibration
Fine-tune the machine's home position during commissioning, using the rear adjuster to set the exact 110 to 160 mm travel window required by the process.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X160-50S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial force—such as the 6136 N push thrust at 0.5 MPa—but also demands on-the-fly end-position tuning without swapping out physical components. If your setup requires less force, stepping down to a 100 mm bore yields 3927 N of push force, whereas moving up to a 160 mm bore provides 10053 N. The 50 mm adjustment window is ideal for product changeovers on a line, allowing operators to dial in the exact stroke limit.
For a direct ISO 15552 replacement match, ensure you specify the 125 mm bore, 160 mm nominal stroke, 50 mm adjustment range, PT port threads, and the -S magnet option. Mounting choices for the SAIJ series include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 160 mm stroke is relatively short for this large bore, side-load risks are minimal, though external guiding is always recommended for heavy lateral loads. If true load-holding is required without live air, consider the SAIL or BSAI series instead of relying on the mechanical stopper.
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 SAIJ125X160-50S FAQ
At a standard operating pressure of 0.5 MPa, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At a maximum pressure of 1.0 MPa, the push force reaches 1251 kgf.
The rear mechanical screw allows you to shorten the effective travel from the 160 mm nominal stroke down to as little as 110 mm. This creates a 110-160 mm adjustable window for fine-tuning the end position, but the screw acts only as a stop and does not lock the load without air pressure.
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