Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-10 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 SAIJ125AX325-10
The AirTAC SAIJ125X325-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end position without swapping out the unit. It provides a usable travel window of 315-325 mm, giving you precise control over a 10 mm adjustment range during commissioning. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with ease.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and operating speeds span 30-500 mm/s. The rear stopper sets the travel end, but it does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-10 |
|---|---|
| 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 SAIJ125AX325-10
| 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 SAIJ125AX325-10 Is Used
Machine Setup Tuning
Dial in the exact 315-325 mm end-stop position during initial commissioning to perfectly align heavy clamping fixtures without machining custom spacers.
Product Changeover
Quickly adjust the stroke by up to 10 mm on a packaging line when switching between slightly different product sizes, minimizing downtime.
Heavy Material Handling
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or workpieces, using the adjustable end-stop to account for material width variations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX325-10 the Right Cylinder?
Choose this 125 mm bore when you need significantly more thrust than the 80 mm bore provides (2513 N push at 0.5 MPa), but do not require the massive output of the 160 mm class (10053 N). The 10 mm adjustable window is ideal for applications requiring exact end-position tuning during machine setup or product changeover, avoiding the need to bolt on external stops or buy a non-standard fixed SAI cylinder. To match this ISO 15552 footprint, specify a 325 mm stroke, 10 mm adjustment, PT ports, and SUS420J2 rod material.
Because the 325 mm stroke is relatively long, ensure you use an external guide to support the load and prevent excessive side-loading on the rod. Remember that the rear adjuster acts only as a travel stop; for load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder instead. Mounting options are limited to 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 SAIJ125AX325-10 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke from the nominal 325 mm down to 315 mm. This creates a 315-325 mm travel window for fine-tuning the retract position without changing the cylinder.
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