Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-10
The AirTAC SAIJ125X950-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of pull force at 0.5 MPa. It features a SUS420J2 stainless steel rod and PT tapered ports. The built-in adjuster creates a usable travel window between 940 and 950 mm, allowing you to dial in the exact retract position without swapping hardware.
Because this model carries a lengthy 950 mm stroke, the 32 mm rod and M27x2 thread provide necessary rigidity, though an external guide is still recommended to manage side loads. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting options cover Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAIJ125AX950-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAIJ125AX950-10 Is Used
Precision Machine Setup
Dial in the exact 940-950 mm retract position during commissioning to achieve precise end-stop tuning without machining new hard stops.
Product Size Changeovers
Quickly adapt a packaging line for different carton lengths by adjusting the rear screw up to 10 mm during product-size changes.
Variable End Stops
Provide a variable end-stop on heavy material handling equipment where a fixed 950 mm stroke might slightly overshoot the target.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-10 the Right Cylinder?
Select this 125 mm bore when a 100 mm bore (offering 3681N pull at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is physically too large. The 10 mm adjustment range is tailored for precision commissioning fine-tuning and product-size changeovers on a line, providing variable end-stops without the need for external stops. To match an ISO 15552 replacement, verify the 950 mm stroke, 10 mm adjust, PT port, and mounting style.
For any stroke of 300 mm or more, side-load management becomes critical; always use an external guide to support the load. Note that the rear adjuster functions strictly as a travel stop and does not hold the load without live air. For load-holding without pneumatic pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125AX950-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of pull force and 8590N of push force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster acts as a stopper that lets you shorten the effective stroke by up to 10 mm, creating a 940-950 mm travel window. It sets the end position but does not lock the load without live air.
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