Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-100S 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 SAIJ125AX290-100S
The AirTAC SAIJ125X290-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5MPa. It features a SUS420J2 stainless steel rod and a built-in magnet for position sensing. The integrated rear screw allows you to trim the nominal 290mm stroke back by up to 100mm, creating a highly versatile 190-290mm usable travel window for fine-tuning end positions during machine commissioning.
This adjustable stopper lets you dial in the exact retract distance without swapping out the entire cylinder or fabricating external stops. It operates at speeds of 30-500mm/s and uses PT G1/2 ports. The extruded aluminum barrel includes sensor grooves on both sides, compatible with AirTAC CMSE reed and DMSE electronic switches for precise end-of-stroke detection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-100S |
|---|---|
| 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 SAIJ125AX290-100S
| 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 SAIJ125AX290-100S Is Used
Variable End-Stop Positioning
Dial in the retract distance within the 190-290mm window to accommodate different material thicknesses or tooling lengths without mechanical redesign.
Product Line Changeover
Rapidly adjust the stroke stop during product size changes on a packaging or handling line, reducing downtime between production runs.
Commissioning Fine-Tuning
Perfect the final retract position during machine setup, using the rear screw to absorb mechanical tolerances rather than adding shims.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-100S the Right Cylinder?
Select this 125mm bore actuator when an application requires substantial thrust, such as 8590N at 0.7MPa, alongside variable end-stop positioning. If your setup needs less force, stepping down to a 100mm bore yields 3927N at 0.5MPa; stepping up to a 160mm bore provides 10053N. Choose the SAIJ adjustable-stroke design over a fixed SAI model when you anticipate frequent product-size changeovers or need to perfect the retract position on the fly. To replace an ISO 15552 cylinder, match the 125mm bore, 290mm stroke, 100mm adjustment, PT G1/2 port, and -S magnet.
Because the 290mm stroke creates a long lever arm, ensure adequate external guidance to prevent side-loading damage to the rod. Remember that the rear adjuster functions strictly as a travel stop, not a locking device; the cylinder cannot hold a load without live air. For true load-holding without pressure, consider an AirTAC SAIL or BSAI model. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX290-100S FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke by up to 100mm. This creates a usable travel window between 190mm and 290mm, enabling precise end-position tuning without changing the cylinder.
At 0.5MPa operating pressure, it provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
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