Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40 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 SAIJ125AX290-40
The AirTAC SAIJ125X290-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod and PT tapered ports. The integrated rear stopper allows you to fine-tune the effective travel down from the 290mm nominal stroke, providing a usable adjustment window of 250-290mm.
This adjuster acts purely as a mechanical stop to set the retract end position and relies on the variable air cushions for deceleration; it does not lock the load without continuous air pressure. For load-holding without live air, an external pilot-operated check valve or a related SAIL lock cylinder is required. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40 |
|---|---|
| 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 SAIJ125AX290-40
| 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 SAIJ125AX290-40 Is Used
Product Changeovers
Dial in the exact 250-290mm end position during format size changes on a packaging line without replacing hardware.
Machine Setup
Fine-tune the retract stop during commissioning to perfect the resting position of heavy forming presses.
Variable End Stops
Adjust the stroke on the fly for diverter gates handling different pallet widths without adding external stops.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40 the Right Cylinder?
Choose this 125mm bore when an 80mm cylinder (providing 2513N push at 0.5 MPa) lacks the thrust for your application, but a 160mm bore (10053N) would be excessive. The 40mm adjustment range is ideal for product changeovers, allowing you to shift the end-stop without physically swapping the cylinder or adding external shims. Because the total stroke is 290mm, ensure adequate external guidance to prevent excessive side-loading on the rod.
To match this ISO 15552 interchangeable cylinder, confirm the 125mm bore, 290mm stroke, 40mm adjustment, PT port threads, and standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that FB, CA, CB, and CR mounts are omitted from this series. As no magnet is specified, position sensing via CMSE or DMSE switches is not enabled out of the box.
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 SAIJ125AX290-40 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster screw lets you shorten the 290mm nominal stroke by up to 40mm, creating a usable travel window of 250-290mm. It functions as a mechanical stop for end-position tuning and does not hold the load without live air pressure.
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