Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10 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 SAIJ125X290-10
The AirTAC SAIJ125X290-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 280-290 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning tasks with precision. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a carbon steel piston rod and tapered PT port threads. The rear stopper allows fine end-position tuning during commissioning without swapping the cylinder or adding external stops. Note that this adjuster acts solely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10 |
|---|---|
| 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 SAIJ125X290-10
| 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 SAIJ125X290-10 Is Used
Heavy-Duty Machining Stops
Fine-tune the 280-290 mm travel window to set precise machining end-stops for large metal components during production runs.
Product Line Changeover
Quickly adjust the rear stopper by up to 10 mm to accommodate slight variations in product dimensions without changing the cylinder.
Automated Assembly Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets into exact alignment before fastening operations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push force at 0.5 MPa) lacks the necessary thrust, but a 160 mm bore is physically oversized. The 10 mm adjustment range is ideal for dialing in exact end-stops during machine setup or product changeovers, offering flexibility a fixed-stroke SAI cylinder cannot match. For load-holding without continuous air pressure, consider an AirTAC SAIL or BSAI cylinder instead. To replace an ISO 15552 unit, match the 125 mm bore, 290 mm stroke, 10 mm adjust, PT ports, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Because the stroke is 290 mm, ensure adequate external guidance to prevent excessive rod side-loading.
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 SAIJ125X290-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke from 290 mm down to 280 mm. This enables precise end-position tuning at commissioning without adding external stops, though it does not lock the load without live air.
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