Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-100 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 SAIJ125AX950-100
The AirTAC SAIJ125X950-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its 950mm nominal stroke paired with a 100mm adjustment screw creates an 850-950mm usable travel window, allowing exact end-position tuning without swapping hardware. The extruded aluminum barrel features sensor grooves on both sides, and this specific configuration utilizes a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance.
Because the adjuster acts purely as a mechanical stop on the retract end, it cannot hold a load without live air pressure. Operating at 30-500mm/s, this cylinder uses PT tapered ports and includes variable air cushions at both ends to manage kinetic energy. It remains dimensionally interchangeable with ISO 15552 cylinders without adopting tie-rod construction.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-100 |
|---|---|
| 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 SAIJ125AX950-100
| 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 SAIJ125AX950-100 Is Used
Variable End-Stop Positioning
Dial in the 850-950mm travel window during setup to accommodate different material lengths without physically changing out the cylinder.
Product Size Changeovers
Quickly adjust the 100mm retract stop on packaging lines to handle varying box or product dimensions on the fly.
Heavy-Duty Machine Setup
Leverage the 6136N push force to move heavy fixtures while fine-tuning the final resting position during initial machine commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX950-100 the Right Cylinder?
Select this 125mm bore cylinder when an application requires substantial thrust—such as 6136N push or 5734N pull at 0.5 MPa—combined with variable end-stops for product changeovers. If your setup needs less force, stepping down to a 100mm bore yields 3927N push force, whereas upgrading to a 160mm bore provides 10053N. The 100mm adjustment range is ideal for dialing in long-stroke machinery during commissioning, avoiding the need to bolt on external stops.
For a drop-in ISO 15552 replacement, match the 125mm bore, 950mm stroke, 100mm adjustment, PT port thread, and SUS420J2 rod material. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the stroke is 950mm, an external guide is strongly recommended to prevent excessive side-loading on the rod. If true load-holding is required without continuous air pressure, consider an AirTAC SAIL or BSAI 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 SAIJ125AX950-100 FAQ
At 0.5 MPa, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw lets you trim the effective stroke back by up to 100mm, creating an 850-950mm usable travel window. It functions as a mechanical stop and does not lock the load without live air.
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