Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-100S 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 SAIJ125AX280-100S
The AirTAC SAIJ125X280-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that provides a 180-280 mm usable travel window. It delivers 6136 N of pull force at 0.5 MPa and reaches a maximum of 11045 N at 0.9 MPa. The extruded aluminum barrel includes sensor grooves on both sides for straightforward position feedback.
Equipped with a SUS420J2 stainless steel rod and PT tapered ports, this unit is built for durability. The -S magnet option supports AirTAC CMSE reed and DMSE electronic sensors. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end without adding external stops, but it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-100S |
|---|---|
| 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 SAIJ125AX280-100S
| 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 SAIJ125AX280-100S Is Used
Variable End-Stop Machining
Dial in the exact retract position for machining operations or part probing without swapping out the physical cylinder.
Product Changeover Diverter
Quickly reconfigure a heavy-duty diverter arm across a 180-280 mm travel window to handle varying package sizes on a packaging line.
Machine Setup Calibration
Fine-tune the end-of-stroke stopping point during commissioning to perfectly time heavy clamping or lifting motions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX280-100S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires heavy thrust combined with flexible end-position tuning during machine setup or product changeover. If your process needs less force, stepping down to an 80 mm bore yields 2268 N of pull at 0.5 MPa, whereas moving up to a 160 mm bore provides 9425 N. For load-holding without continuous air pressure, consider the SAIL or BSAI series, as the SAIJ adjuster is a travel stop, not a lock.
To match this ISO 15552 dimensionally interchangeable cylinder, specify a 125 mm bore, 280 mm stroke, 100 mm adjustment range, PT G1/2 ports, and the -S magnet. With a 280 mm stroke, you should use an external guide to prevent excessive side-loading on the 32 mm rod. The mounting set includes 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 SAIJ125AX280-100S FAQ
At 0.5 MPa it provides 6136 N of pull force and 8590 N of push at 0.7 MPa. The maximum push force is 11045 N at 0.9 MPa.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the nominal 280 mm stroke down to 180 mm. It sets the travel end but does not lock or hold the load without live air pressure.
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