Airtac SAIJ125 Adjustable Cylinder SAIJ125BX280-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX280-10S 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX280-10S
The AirTAC SAIJ125X280-10-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 270-280 mm, allowing you to dial back the nominal 280 mm stroke by up to 10 mm during commissioning without adding external stops. It delivers a robust 6136 N pull force at 0.5 MPa, fitting perfectly into heavy-duty applications.
This variant includes a SUS304 stainless steel rod for superior corrosion resistance and a magnet for position sensing. The extruded aluminum barrel integrates sensor grooves on both sides, fully compatible with AirTAC CMSE reed and DMSE solid-state switches. It uses a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX280-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX280-10S |
|---|---|
| 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 SAIJ125BX280-10S
| 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 SAIJ125BX280-10S Is Used
Machine Setup & Changeover
Fine-tune the 270-280 mm travel window during product line changeovers to accommodate varying package sizes without physically swapping the actuator.
Heavy-Duty Variable End Stops
Dial in the exact retract position on heavy machinery, using the 10 mm adjustment range to compensate for mechanical wear or sensor drift over time.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod and 6136 N pull force for robust positioning in washdown or chemically exposed manufacturing settings.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX280-10S the Right Cylinder?
Choose this 125 mm bore when 80 mm is insufficient (80 mm yields 2268 N pull at 0.5 MPa) and 160 mm is too large (14074 N pull). The adjustable rear stopper is ideal for machine setups requiring precise end-position tuning or frequent product changeovers, offering flexibility a fixed-stroke SAI cylinder cannot. For any stroke of 280 mm, ensure external guides are used to manage side loads, as the M27x2 rod thread handles high forces but cannot support unsupported lateral stresses.
The rear adjuster acts solely as a travel stop and cannot hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series. This ISO 15552 dimensionally interchangeable cylinder features PT tapered ports and a -S magnet for CMSE/DMSE sensors.
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 SAIJ125BX280-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force at 0.7 MPa. The maximum operating pressure is 1.0 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 10 mm, creating a 270-280 mm usable travel window. It functions as a mechanical stop to fine-tune end positions and does not lock or hold the load without live air pressure.
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