Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-100 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 SAIJ125X950-100
The AirTAC SAIJ125X950-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 950mm stroke that can be dialed back by up to 100mm, yielding a usable travel window of 850-950mm. This built-in adjustability allows you to fine-tune the retract end-position at commissioning without swapping the cylinder or adding external stops. Delivering 6136N of pull force at 0.5MPa, it handles heavy loads with ease.
The 125mm bore uses a G1/2 port and a robust 32mm carbon steel rod with an M27x2 thread. Because the adjuster functions strictly as a mechanical stop and the variable air cushions only manage deceleration, this cylinder cannot hold a load without live air pressure. For position-holding requirements, consider the SAIL or BSAI series. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is specified later.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-100 |
|---|---|
| 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 SAIJ125X950-100
| 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 SAIJ125X950-100 Is Used
Machine Changeover
Dial in the 850-950mm retract position during product size changes without replacing the cylinder or adding external mechanical stops.
Heavy Material Handling
Leverage the 6136N pull force at 0.5MPa to push or pull heavy pallets and fixtures across a 950mm travel distance.
End-Position Calibration
Use the 100mm rear adjustment screw to fine-tune the exact end-of-stroke position during initial machine commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-100 the Right Cylinder?
Choose this 125mm bore model when your application requires substantial thrust, such as 6136N pull at 0.5MPa, stepping up from an 80mm bore that provides 2268N. The 100mm adjustment range is ideal for machinery requiring variable end-stops during product changeovers. Mounting options include the SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. The PT tapered port thread ensures a tight, reliable pneumatic connection.
Because this cylinder features a 950mm stroke, the long unsupported piston rod is susceptible to side-loading. An external guide mechanism is highly recommended to prevent premature wear. If your setup requires true load-holding without continuous air pressure, the rear adjuster will not suffice; you should look to an external rod lock or the AirTAC SAIL pneumatic-lock cylinder instead.
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 SAIJ125X950-100 FAQ
At an operating pressure of 0.5MPa, this 125mm bore cylinder provides 6136N of pull force and 6136N of push force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster acts as a mechanical stop that shortens the 950mm nominal stroke by up to 100mm, giving an adjustable travel window of 850-950mm. It sets the end position but does not lock or hold the load without continuous air pressure.
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