Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-100
The AirTAC SAIJ125X700-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N push force at 0.5MPa. It features a 125mm bore, a PT G1/2 port, and a 700mm nominal stroke that can be dialed back by up to 100mm, creating a precise 600-700mm usable travel window. This adjustability allows you to fine-tune the retract end position during commissioning without swapping the cylinder or adding external stops.
Built with a standard carbon steel rod and variable air cushions at both ends, this extruded aluminum profile cylinder handles speeds of 30-500mm/s. The rear adjuster acts purely as a travel stop for deceleration and end-position setting, meaning it does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125X700-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SAIJ125X700-100 Is Used
Product Size Changeover
Dial in the 600-700mm travel window during format changes on packaging lines, using the rear stopper to set new end positions rapidly without mechanical rebuilds.
Machine Setup Tuning
Fine-tune the retract end position at commissioning to achieve exact alignment, leveraging the 100mm adjustment range to dial in the perfect stopping point.
Heavy Material Handling
Move heavy payloads using the 6136N push force at 0.5MPa, relying on the adjustable stop to accommodate varying material lengths on the conveyor.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-100 the Right Cylinder?
Choose this 125mm bore when you need substantial thrust, such as the 6136N push or 5734N pull force at 0.5MPa. If your application requires less force, stepping down to a 100mm bore yields 3927N push force, whereas a 160mm bore provides 10053N for heavier loads. The adjustable stroke is ideal for product-size changeovers on a line, providing a variable end-stop that a fixed-stroke SAI cylinder cannot match.
When replacing an ISO 15552 cylinder, match the 125mm bore, 700mm stroke, 100mm adjustment range, PT G1/2 port, and mounting style. The SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR options. Because the stroke is 700mm, the 32mm rod and M27x2 thread will still experience leverage forces; an external guide is recommended to prevent excessive side-loading on long unsupported travels.
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 SAIJ125X700-100 FAQ
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective stroke by up to 100mm. This creates a 600-700mm adjustable travel window, allowing you to fine-tune the end position without changing the cylinder or adding external stops.
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
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