Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-100S
The AirTAC SAIJ125X325-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear positioning screw, allowing you to dial back the nominal 325 mm stroke by up to 100 mm. This creates a highly flexible 225-325 mm usable travel window, letting you fine-tune the retract end position during commissioning or product changeovers without swapping out the actuator. In the 125 mm bore class, it delivers a robust 6136 N push force at 0.5 MPa, scaling up to 11045 N at 0.9 MPa.
This variant features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and includes a built-in magnet for position sensing. It is compatible with AirTAC CMSE reed and DMSE solid-state switches fitted into the dual-side sensor grooves on the extruded aluminum barrel. The PT tapered porting and M27x2 rod thread are engineered for heavy-duty industrial dynamics.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAIJ125AX325-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAIJ125AX325-100S Is Used
Machine Changeover Tuning
Quickly adapt the retract distance from 225 to 325 mm during product size changes on a packaging line without disassembling the actuator setup.
Variable End-Stop Positioning
Dial in the exact retract position during machine commissioning to perfect material feeding or clamping distances on the fly.
Heavy-Duty Forming
Leverage the 6136 N push force at 0.5 MPa for pressing or forming tasks while retaining the flexibility to adjust the stroke length for different tooling.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-100S the Right Cylinder?
Select this 125 mm bore actuator when your machinery requires substantial thrust—stepping down to a 100 mm bore drops the 0.5 MPa push force to 3927 N, while stepping up to 160 mm increases it to 10053 N. The adjustable rear stopper is chosen over a fixed-stroke SAI when you need variable end-stop positioning on the fly. However, the adjuster acts strictly as a travel stop and does not hold the load without live air; for fail-safe load holding, consider the SAIL (pneumatic lock) or BSAI (clamp-lock) series. Because the 325 mm stroke is relatively long, an external guide rail should be used to prevent excessive side-loading on the M27x2 rod. As a dimensionally interchangeable ISO 15552 cylinder, it matches standard mounting interfaces (Basic, FA, LB, TC, FTC, TCM1, TCM2) without requiring custom brackets.
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 SAIJ125AX325-100S FAQ
It features a rear adjusting screw that acts as a mechanical stop, allowing you to shorten the effective stroke by up to 100 mm. This provides a usable travel window of 225-325 mm, which can be fine-tuned during commissioning without replacing the cylinder.
At a 0.5 MPa operating pressure, the SAIJ125X325-100-S provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
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