Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10
The AirTAC SAIJ125X350-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 340-350 mm usable travel window, allowing you to dial back the nominal 350 mm stroke by up to 10 mm during commissioning without adding external stops. Belonging to the 125 mm bore class, it delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This model uses a PT tapered port and a robust 32 mm carbon steel rod with an M27x2 thread. It includes variable air cushions at both ends to manage kinetic energy. The extruded aluminum barrel features sensor grooves on both sides for CMSE reed or DMSE electronic switches, though a magnet is not specified for this configuration. The mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125X350-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAIJ125X350-10 Is Used
Heavy Press Tuning
Dial in the exact 340-350 mm contact point on a large press without machining new stopper blocks during setup.
Product Changeover
Adjust the retract distance up to 10 mm on packaging lines when switching between variant product sizes.
Material Handling
Position heavy material trays with 6136 N of thrust at 0.5 MPa while fine-tuning the end-of-stroke stop.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X350-10 the Right Cylinder?
Choose this 125 mm bore actuator when an application requires substantial thrust combined with precise end-position tuning. If you need slightly less force, stepping down to an 80 mm bore yields 2513 N of push force at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N. The integrated rear screw acts purely as a travel stop to fine-tune the 340-350 mm window; it does not hold the load without live air. For true pneumatic locking without pressure, consider the SAIL or BSAI series instead.
Because the 350 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the 32 mm rod. To replace an ISO 15552 cylinder, match the 125 mm bore, 350 mm stroke, 10 mm adjustment, PT port, and desired mounting bracket. Speeds for this bore size range from 30-500 mm/s.
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 SAIJ125X350-10 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back by up to 10 mm, creating a 340-350 mm usable window. It is a stop, not a lock, and requires live air to hold the load.
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