Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10S 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 SAIJ125AX280-10S
The AirTAC SAIJ125X280-10-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 10mm adjustment range, creating a precise 270-280mm usable travel window for fine-tuning end positions without external stops.
This variant includes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and a built-in magnet (-S) for use with CMSE reed or DMSE electronic sensors. The extruded aluminum barrel incorporates sensor grooves on both sides, and the rear stopper simply sets the travel limit without locking the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10S |
|---|---|
| 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 SAIJ125AX280-10S
| 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 SAIJ125AX280-10S Is Used
Product Changeover
Dial in the 270-280mm travel window during packaging line format changes to accommodate slightly different carton depths without changing the cylinder.
End-Position Tuning
Fine-tune the retract stroke end during machine commissioning to perfectly seat heavy components, utilizing the 10mm rear stopper for exact positioning.
Heavy Assembly Pressing
Leverage the 6136N push force at 0.5MPa to seat large bearings, using the adjustable stop to prevent over-travel on delicate parts.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-10S the Right Cylinder?
Choose this 125mm bore when a 100mm cylinder (providing 3927N push at 0.5MPa) lacks the necessary thrust, but a 160mm bore (10053N) would be excessive. The 10mm adjustable window is ideal for applications requiring slight end-position tuning during commissioning or product-size changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder.
Because the nominal stroke is 280mm, ensure adequate external guidance to prevent excessive side loading on the rod. To match this exact configuration for an ISO 15552 replacement, specify the 125mm bore, 280mm stroke, PT tapered port thread, SUS420J2 rod, and the -S magnet. If true load-holding without live air pressure is required, select an SAIL or BSAI cylinder instead, as this adjuster acts only as a stop.
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 SAIJ125AX280-10S 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 acts as a mechanical stop that shortens the effective stroke. For this SAIJ125X280-10-S model, you can trim the nominal 280mm stroke back by up to 10mm, providing a usable travel window of 270-280mm. It does not lock the load without live air pressure.
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