Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-30 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 SAIJ125AX1000-30
The AirTAC SAIJ125X1000-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end position. It provides a usable travel window of 970 to 1000 mm, enabling precise end-position tuning at commissioning without swapping the cylinder or adding external stops. In the 125 mm bore class, it delivers a push force of 6133 N and a pull force of 5734 N at 0.5 MPa operating pressure.
This made-to-order unit features a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a travel stop to set the stroke end, not as a lock, and the standard air cushions handle deceleration without holding the load without live air.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-30 |
|---|---|
| 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 SAIJ125AX1000-30
| 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 SAIJ125AX1000-30 Is Used
Heavy Press Fine-Tuning
Dial in the exact 970-1000 mm retract position during heavy press commissioning to accommodate material thickness variations without adding external mechanical stops.
Product Changeover Stops
Adjust the rear stopper by up to 30 mm to quickly set new end positions when a conveyor line switches to handling different package lengths.
Long-Stroke Positioning
Utilize the 1000 mm travel window to move heavy jigs along an assembly line, relying on the 125 mm bore to deliver over 6 kN of thrust at low pressure.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX1000-30 the Right Cylinder?
Select this 125 mm bore model when an application requires heavy thrust between 6136 N and 8590 N, stepping up from the 80 mm bore that provides 2513 N at 0.5 MPa. An adjustable stroke is chosen over a fixed SAI cylinder when a machine requires a variable end-stop for product changeovers or setup adjustments. To replace an ISO 15552 cylinder, match the 125 mm bore, 1000 mm stroke, 30 mm adjustment range, PT port threads, and standard mounting options.
Because the stroke is 1000 mm, the 32 mm diameter rod and M27x2 rod thread must be adequately supported to prevent excessive side loading; an external guide rail is strongly recommended for long unsupported travels. The standard SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For load-holding without live 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 SAIJ125AX1000-30 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 30 mm. This creates a 970-1000 mm usable travel window for fine-tuning the end position at setup.
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