Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-30
The AirTAC SAIJ125X50-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 50mm stroke that can be fine-tuned backward by up to 30mm, yielding a usable travel window of 20-50mm for exact end-position calibration. The 125mm bore delivers 6136N of push force and 5734N of pull force at 0.5MPa, making it suited for heavier actuation duties.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and utilizes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU is not configured with a magnet for position sensing. The rear adjuster functions purely as a travel stop to dial in the retract position during commissioning, and it does not lock or hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 50 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 SAIJ125AX50-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 SAIJ125AX50-30 Is Used
Product Changeover
Dial the rear adjuster to shift the travel end from 50mm to 20mm instantly when running a different package size on the same line.
Press Fit Tuning
Fine-tune the 20-50mm retract stop during machine setup to achieve precise contact pressure without adding external mechanical stops.
Heavy Load Positioning
Leverage the 6136N push force at 0.5MPa to move heavy jigs into place, using the rear screw to set the exact resting position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX50-30 the Right Cylinder?
Select this 125mm bore model when your application requires substantial thrust—stepping down to a 100mm bore drops the 0.5MPa push force to 3927N, while this unit's 6136N output handles much heavier masses. The 30mm adjustment range is ideal for product changeovers on a line, allowing you to shift the end-stop from 50mm down to 20mm without physically swapping the cylinder or adding external stopper blocks. For load-holding requirements without continuous air pressure, this standard adjuster configuration is insufficient; you would need to look at the SAIL (pneumatic lock) or BSAI (clamp-lock) series instead. To replace an ISO 15552 cylinder, match the 125mm bore, 50mm stroke, PT G1/2 port, and the required mounting bracket from the SAIJ set (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 SAIJ125AX50-30 FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder generates 6136N of push force and 5734N of pull force. If operating at 0.7MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back by up to 30mm. This creates a usable stroke window of 20-50mm, allowing you to fine-tune the end position at commissioning without replacing the cylinder.
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