Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 280mm 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
- Stroke280 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10
The AirTAC SAIJ125X280-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 270-280 mm usable travel window, allowing you to dial back the nominal 280 mm stroke by up to 10 mm. Delivering a robust 6136 N push force at 0.5 MPa, it is built with a SUS420J2 stainless steel rod and PT tapered port threads.
This adjustable design allows fine end-position tuning at commissioning without swapping the cylinder or adding external stops. The rear screw acts purely as a travel stop to set the retraction endpoint, while the extruded aluminum barrel includes dual-side sensor grooves for flexible switch mounting.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 280 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 SAIJ125AX280-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×280 | 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 SAIJ125AX280-10 Is Used
Machine Setup Tuning
Dial in the exact 270 to 280 mm end position during commissioning to perfectly align heavy clamping fixtures without adding external stopper blocks.
Product Changeover
Quickly adjust the retract stroke by up to 10 mm on packaging lines handling varying product sizes, minimizing downtime between production runs.
Heavy Load Positioning
Leverage the 6136 N push force to move heavy pallets or chassis components, using the rear stop to set precise indexing limits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10 the Right Cylinder?
Choose this 125 mm bore when your application requires heavy thrust, generating 6136 N push and 5734 N pull at 0.5 MPa. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N push. The 10 mm adjustment window is ideal for machine setup and product changeover, letting you fine-tune the end stop without external hardware.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 280 mm stroke, 10 mm adjustment, PT ports, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is 280 mm, ensure adequate side-load support with an external guide. The adjuster is a stop, not a lock; for load-holding without live air, use a SAIL or BSAI cylinder.
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 SAIJ125AX280-10 FAQ
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
A rear adjusting screw lets you shorten the effective travel from 280 mm down to 270 mm. This stopper sets the retract end position during setup but does not lock or hold the load without live air pressure.
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