Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm 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
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75
The AirTAC SAIJ125X1000-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits up to 75 mm of end-position tuning. This creates a usable travel window between 925 and 1000 mm, allowing you to dial in the exact retract distance during commissioning without adding external stops. It delivers robust thrust, pushing with 6136 N and pulling with 5734 N at 0.5 MPa. The piston rod is built from SUS420J2 stainless steel (code A) for superior corrosion resistance, while the extruded aluminum barrel integrates sensor grooves on both sides.
This model uses a PT tapered port thread (G1/2) and achieves a maximum standard stroke of 1500 mm, making the 1000 mm stroke a standard configuration. It supports a speed range of 30-500 mm/s and features adjustable air cushions at both ends to decelerate the heavy 125 mm bore load. The rear adjuster screw acts strictly as a travel stop to set the end position, not as a lock, meaning live air pressure is required to hold the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAIJ125AX1000-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125AX1000-75 Is Used
Machine Changeover
Dial in the retract stroke by up to 75 mm during product size transitions without replacing the cylinder or repositioning external hard stops.
Long-Stroke Positioning
Move heavy fixtures along a 925-1000 mm travel path, using the rear stopper to fine-tune the exact end-of-stroke resting position.
Heavy Load Ejection
Push substantial parts out of a press line, relying on the 6136 N push force at 0.5 MPa and SUS420J2 stainless rod for durability.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-75 the Right Cylinder?
Choose this 125 mm bore when 100 mm bore falls short, delivering 3927 N of push force at 0.5 MPa compared to this model's 6136 N. If your application requires less force, stepping down reduces air consumption. Select the SAIJ adjustable-stroke variant over a fixed SAI cylinder when your machine setup involves product changeovers or requires precise end-position tuning without physically swapping the cylinder. To replace this unit, match the 125 mm bore, 1000 mm stroke, 75 mm adjustment, PT G1/2 port, and SUS420J2 stainless rod.
Because the stroke is 1000 mm, the long unsupported piston rod is susceptible to side-loading damage; always use an external guide rail to prevent binding. For applications that must hold a load in place without continuous live air pressure, note that the rear adjuster and air cushions do not function as a brake. In those cases, integrate an external pilot-operated check valve or select an AirTAC SAIL or BSAI clamp-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 SAIJ125AX1000-75 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 1000 mm nominal stroke by up to 75 mm. This creates a usable travel window of 925 to 1000 mm for fine-tuning the retract position during setup.
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