Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-75 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 SAIJ125X290-75
The AirTAC SAIJ125X290-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window from 215 to 290 mm without adding external stops. It delivers 6136 N of pull force at 0.5 MPa and up to 11045 N at 0.9 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This model uses a PT tapered port and a 32 mm carbon steel rod with an M27x2 thread. The rear adjustment screw functions purely as a mechanical stop to set the retract end position; it does not hold the load without live air pressure. For fail-safe load holding, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-75 |
|---|---|
| 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 SAIJ125X290-75
| 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 SAIJ125X290-75 Is Used
Machine Changeover
Dial in the 215-290 mm travel window during product family transitions to set new end stops without swapping out the entire cylinder assembly.
Heavy Positioning
Leverage the 11045 N push force at 0.9 MPa to move substantial jigs or workpieces into exact alignment before a secondary machining operation.
Variable End Stops
Adjust the rear stopper on the line to compensate for mechanical wear or slightly varying material lengths over the equipment lifecycle.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-75 the Right Cylinder?
Choose this adjustable-stroke model when your application requires frequent product-size changeovers or precise end-position tuning at commissioning, eliminating the need to physically swap cylinders. If your force requirements are lower, stepping down to a 100 mm bore yields 3681 N of pull force at 0.5 MPa. Because the 290 mm stroke is relatively long, an external guide is recommended to prevent excessive side-loading on the rod.
To match this ISO 15552 cylinder for a replacement, verify the 125 mm bore, 290 mm stroke, 75 mm adjustment range, PT port thread, and your required mounting accessory (available options include Basic, FA, LB, TC, FTC, TCM1, and TCM2). A magnet for sensors is not specified for this configuration.
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 SAIJ125X290-75 FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjuster acts as a mechanical stop that lets you shorten the 290 mm nominal stroke by up to 75 mm, creating a usable travel window of 215 to 290 mm for fine-tuning at commissioning.
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