Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-30S
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X290-30S 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-30S
The AirTAC SAIJ125X290-30-S is a double-acting, double-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. The integrated magnet enables position feedback via AirTAC CMSE reed or DMSE electronic sensors.
This specific SKU provides a nominal 290mm stroke that can be fine-tuned down by up to 30mm, creating a usable travel window of 260-290mm. This allows you to dial in exact end positions during commissioning without adding external stops. The extruded aluminum barrel features sensor grooves on both sides, and the carbon steel rod uses an M27x2 thread.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-30S |
|---|---|
| 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-30S
| 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 SAIJ125X290-30S Is Used
Heavy-Duty Press Fit
Dial in the exact 260-290mm insertion depth for large bearings during assembly, allowing precise end-position tuning without swapping physical stop blocks.
Product Size Changeover
Quickly adjust the rear stopper by up to 30mm when switching between product variants on a packaging line, minimizing machine downtime.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-30S the Right Cylinder?
The adjustable 260-290mm travel window is ideal for product changeovers or variable end-stops on a line, offering more setup flexibility than a fixed-stroke SAI cylinder. Because the nominal stroke is 290mm, ensure an external guide supports the load to prevent excessive side-loading on the M27x2 rod.
The rear adjuster acts strictly as a travel stop and does not hold the load without live air; for pilot-operated locking, consider the SAIL or BSAI series. To match this ISO 15552 interchangeable cylinder, specify: 125mm bore, 290mm stroke, 30mm adjustment, PT tapered port thread, and the -S magnet option.
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 SAIJ125X290-30S FAQ
At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 290mm down to 260mm. This creates a 260-290mm usable window for fine-tuning the retract end position at commissioning without changing the cylinder.
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