Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100
The AirTAC SAIJ125X290-100 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a 6136N push force at 0.5 MPa. It features a 125mm bore, a standard carbon steel rod with an M27x2 thread, and PT tapered ports. The integrated adjustment screw provides a usable travel window of 190 to 290mm, allowing you to dial in the exact retract distance during commissioning without adding external stops.
This adjustable-stroke design is ideal for high-force applications requiring product changeovers. It retains the standard extruded aluminum barrel with dual sensor grooves, though it omits the FB, CA, CB, and CR mounting options, supporting only Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets. Note that the rear adjuster functions strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAIJ125X290-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAIJ125X290-100 Is Used
Product Size Changeovers
Rapidly reconfigure the 190-290mm travel window on packaging lines handling different carton depths without swapping out the entire cylinder assembly.
High-Force Positioning
Leverage the 6136N thrust at 0.5 MPa to move heavy fixtures, using the rear stopper to fine-tune the final clamping position during machine setup.
Variable End-Stop Bumping
Use the adjustable retract end to tune the impact deceleration point for heavy loads, relying on the 40mm air cushion and external stopper for controlled landing.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100 the Right Cylinder?
Choose this 125mm bore cylinder when a smaller 100mm bore (offering 3927N push at 0.5 MPa) cannot meet your thrust requirements, or step down if the 80mm bore (2513N) is sufficient. The SAIJ125X290-100 is selected over a fixed-stroke SAI when a machine handles varying product sizes, utilizing the 100mm adjustment range to reposition the end-stop rapidly. For any load-holding requirements without continuous air pressure, this cylinder is insufficient as the adjuster is not a lock; consider an AirTAC SAIL or BSAI series instead.
When replacing an ISO 15552 cylinder, match the 125mm bore, 290mm nominal stroke, 100mm adjustment range, PT port threads, and the appropriate mounting bracket. Because the 290mm stroke is substantial, the M27x2 rod and carbon steel construction carry significant side-load risks; always utilize an external guide to prevent rod binding, and note the operating speed is limited to 30-500 mm/s for this bore size.
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 SAIJ125X290-100 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the effective stroke by up to 100mm. This creates a usable travel window from 190mm to 290mm, enabling precise end-position tuning at commissioning without external stops.
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