Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100S 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 SAIJ125X290-100S
The AirTAC SAIJ125X290-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and features a generous 100mm adjustment range, creating a usable travel window between 190mm and 290mm. This wide tuning band allows operators to dial in exact retract end-positions during commissioning or product changeovers without adding external stops.
Built with a standard carbon steel piston rod and a PT tapered port, this unit includes a magnet (-S) for position sensing. The extruded aluminum barrel houses sensor grooves on both sides, fully compatible with AirTAC CMSE reed and DMSE electronic solid-state switches. It supports the standard SAIJ mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR configurations.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100S |
|---|---|
| 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 SAIJ125X290-100S
| 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 SAIJ125X290-100S Is Used
Multi-Product Changeovers
Leverage the 190-290mm adjustable travel window to switch end-stops rapidly on packaging lines running varied carton sizes, avoiding mechanical rebuilds.
Heavy Press Fitting
Utilize the 6136N push force at 0.5MPa to seat heavy components, using the rear screw to precisely limit the retract position and prevent over-travel.
Variable End-Stop Positioning
Fine-tune the retraction point during machine commissioning to synchronize multi-stage assembly stations without fabricating custom external stopper blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X290-100S the Right Cylinder?
Choose this 125mm bore when an application requires substantial thrust—such as 6136N push or 5734N pull at 0.5MPa—surpassing the 3927N push capacity of the 100mm bore. The 100mm adjustment window is ideal for production lines running multiple product sizes, allowing the end-stop to be fine-tuned on the fly instead of physically swapping cylinders. Because the stroke is 290mm, an external guide should be used to prevent excessive side-loading on the 32mm rod.
For a drop-in ISO 15552 replacement, match the 125mm bore, 290mm nominal stroke, PT port thread, and the reduced SAIJ mounting footprint. If the machine requires true load-holding without continuous air pressure, note that this rear adjuster acts only as a travel stop and deceleration point, not a lock; you would need to specify an AirTAC SAIL or BSAI cylinder 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 SAIJ125X290-100S FAQ
At 0.5MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw lets you shorten the effective stroke by up to 100mm. For this 290mm nominal stroke model, it creates a usable travel window of 190-290mm, allowing precise end-position tuning at commissioning.
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