Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 60mm 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
- Stroke60 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-50
The AirTAC SAIJ125X60-50 is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical adjuster, allowing you to dial back the 60 mm nominal stroke by up to 50 mm. This creates a highly versatile 10-60 mm usable travel window, perfect for product changeovers on a packaging line. It delivers a robust 6136 N of push force at 0.5 MPa, utilizing a 32 mm SUS420J2 stainless steel rod for enhanced durability against lateral stress.
Unlike fixed-stroke SAI units, this adjustable variant lets you set the exact end-of-travel stop during commissioning without swapping the cylinder or adding external stops. It features a PT tapered port thread, operates at speeds of 30-500 mm/s, and includes variable air cushions at both ends. Note that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 60 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 SAIJ125AX60-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×60 | 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 SAIJ125AX60-50 Is Used
Product Changeover
Rapidly adjust the 10-60 mm stroke window to accommodate varying package sizes on a packaging line without changing cylinder mounts.
End-Stop Tuning
Fine-tune the final retracted position during machine commissioning to achieve precise registration without adding external mechanical stops.
Heavy Forming
Leverage the 6136 N push force at 0.5 MPa for pressing or clamping operations where the exact material thickness varies slightly per batch.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX60-50 the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) is insufficient for your heavy-load actuation needs. The 50 mm adjustment range is particularly valuable for machines running multiple product sizes, as it allows operators to reposition the end stop rapidly rather than fabricating new hard stops. When ordering, specify the PT port thread, SUS420J2 rod material, and the 50 mm adjustment range to ensure a direct ISO 15552 replacement match.
Because the nominal stroke is relatively short (60 mm), side-loading risks are minimal, but the 32 mm rod still requires proper guide alignment to prevent seal wear. If your application requires the cylinder to maintain its position without continuous air pressure, this standard SAIJ adjuster will not act as a lock; instead, consider the AirTAC SAIL or BSAI series for pneumatic locking or clamping functions.
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 SAIJ125AX60-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjusting screw allows you to shorten the 60 mm nominal stroke by up to 50 mm, providing a usable travel range of 10 to 60 mm. The adjuster acts as a mechanical stop to set the end position, but it does not lock the load without live air pressure.
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