Airtac SAIJ125 Adjustable Cylinder SAIJ125AX275-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX275-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX275-10
The AirTAC SAIJ125X275-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 265-275 mm usable travel window, allowing you to dial in the exact end position without swapping components. Equipped with a SUS420J2 stainless steel rod (code A), it handles heavy loads with a push force of 6139 N at 0.5 MPa.
This heavy-duty actuator uses PT tapered ports and operates at speeds of 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface is dimensionally interchangeable per ISO 15552. The rear adjuster acts purely as a mechanical stop to fine-tune deceleration, not as a lock, meaning live air pressure is required to hold the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX275-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX275-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 275 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 SAIJ125AX275-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×275 | 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 SAIJ125AX275-10 Is Used
Machine Setup & Changeover
Fine-tune the 265-275 mm travel window during line changeovers to accommodate new product sizes without replacing the cylinder.
Heavy Pressing Operations
Leverage the 6139 N push force at 0.5 MPa for heavy pressing or clamping tasks, using the 10 mm adjuster to set the exact contact stop.
Variable End-Stop Positioning
Dial in the retract end-position precisely during commissioning, using the rear screw stopper to perfect the stroke limit on the factory floor.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX275-10 the Right Cylinder?
Choose this 125 mm bore when your application requires substantial thrust, delivering 6139 N push force at 0.5 MPa, which is a significant step up from the 80 mm bore's 2513 N. The 10 mm adjustment range is ideal for precision machine setup or product changeover, letting you trim the 275 mm stroke back by up to 10 mm rather than machining external stops or reverting to a fixed SAI cylinder.
Because the stroke is 275 mm, an external guide is recommended to prevent excessive side-loading on the 32 mm rod. For drop-in compatibility, match the 125 mm bore, 275 mm stroke, PT port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that this plain cylinder lacks a magnet; if you need position sensing, specify the -S option for CMSE reed or DMSE electronic sensors. For load-holding without live air, select a SAIL or BSAI series 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 SAIJ125AX275-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6139 N and a pull force of 5734 N. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 275 mm nominal stroke by up to 10 mm, creating a 265-275 mm usable travel window. It sets the end position but does not lock the load without live air pressure.
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