Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50
The AirTAC SAIJ125X130-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 80 to 130 mm by using the 50 mm adjustment screw to trim the nominal stroke. Operating at 0.5 MPa, it delivers 6136 N of pull force, while the PT tapered port threads ensure a tight pneumatic connection.
This model features an extruded aluminum barrel with sensor grooves on both sides, supporting CMSE reed and DMSE electronic switches if a magnet is added later. The 32 mm carbon steel rod and M27x2 thread provide high structural rigidity, and the variable air cushions at both ends absorb impact energy at the end of travel.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125X130-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125X130-50 Is Used
Product Changeover
Dial in the 80-130 mm travel window during packaging line format changes to accommodate varying carton sizes without hardware swaps.
End-Stop Calibration
Use the rear screw to precisely set the retract position for machining or clamping tasks that require strict positional accuracy.
Assembly Pressing
Leverage the 6136 N pull force to seat bearings or components, adjusting the press depth on the fly for different assemblies.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-50 the Right Cylinder?
Choose this 125 mm bore when a smaller 100 mm bore (offering 3681 N pull at 0.5 MPa) lacks the necessary force, but a larger 160 mm bore is excessive. The 50 mm adjustment range is ideal for fine-tuning end positions during machine setup or product changeover without physically swapping the cylinder or adding external stops.
For any application needing true load-holding without live air pressure, remember the rear adjuster acts only as a travel stop and not a brake; consider the SAIL or BSAI series instead. This SAIJ configuration uses PT ports, lacks a magnet, and supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) omitting FB, CA, CB, and CR.
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 SAIJ125X130-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of pull force and 8590 N of push force at 0.7 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the 130 mm nominal stroke, creating a usable 80 to 130 mm travel window for fine-tuning end positions without replacing the cylinder.
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