Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10S 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 SAIJ125X290-10S
The AirTAC SAIJ125X290-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force at 0.5 MPa and features a 280-290 mm usable travel window, allowing you to trim the nominal 290 mm stroke by up to 10 mm during commissioning. This built-in stopper eliminates the need to swap cylinders or add external shims for minor end-position corrections.
Fitted with a PT tapered port and a 32 mm carbon steel rod, this extruded aluminum barrel includes sensor grooves on both sides. The -S magnet option supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position detection. It uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10S |
|---|---|
| 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 SAIJ125X290-10S
| 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 SAIJ125X290-10S Is Used
Heavy Fixture Alignment
Dial in the exact clamping end-position on large machining fixtures, using the 10 mm trim to compensate for part tolerance variations without changing the cylinder.
Product Changeover Stops
Adjust the retract stopper by a few millimeters during production line size changeovers, avoiding the downtime of physically swapping out pneumatic components.
Assembly Press Tuning
Fine-tune the bottoming position on heavy assembly presses, using the 6136 N thrust to seat components reliably while adjusting the stroke end to prevent over-travel.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-10S the Right Cylinder?
Choose this 125 mm bore when an 80 mm cylinder (providing 2513 N push at 0.5 MPa) lacks the thrust for your heavy fixtures, but a 160 mm bore is physically too large. The 10 mm adjustable window is perfect for applications requiring exact end-position tuning without mechanical rework. Because the stroke is 290 mm, ensure adequate external guiding to handle side loads over this travel distance.
For ISO 15552 interchangeability, match the 125 mm bore, 290 mm stroke, PT port thread, and -S magnet. Remember that the rear adjuster is a travel stop, not a lock; it cannot hold a load without live air. If your application requires true load-holding without pneumatic pressure, consider the SAIL air-released lock or BSAI clamp-lock cylinders 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 SAIJ125X290-10S 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 an external stopper that allows you to shorten the effective stroke from 290 mm down to 280 mm. This creates a 280-290 mm usable travel window for fine-tuning the end position at commissioning without adding external stops.
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