Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-30
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 325mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke325 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-30
The AirTAC SAIJ50X325-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel. With a nominal 325 mm stroke and a 30 mm adjustment range, it provides a usable travel window of 295 to 325 mm for precise end-position tuning during commissioning. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it well-suited for moderate-duty positioning tasks.
This variant is configured with a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and features PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU omits the internal magnet, so external solid-state or reed switches like CMSE or DMSE cannot be mounted. The rear adjuster functions strictly as a mechanical stop to set the retract end; it does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-30 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 325 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | 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 SAIJ50 Adjustable Cylinder SAIJ50AX325-30 Is Used
Machine Changeovers
Dial in the retract end position from 295 to 325 mm during product size transitions without replacing the cylinder or adding external stops.
Variable End Stops
Set precise discharge positions for varying package lengths on a packaging line, using the rear screw to fine-tune the stroke.
Assembly Calibration
Adjust the travel window during commissioning to perfect the pressing depth or alignment of components on an automated fixture.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-30 the Right Cylinder?
Choose this 50 mm bore cylinder when your application requires 982 N of push force at 0.5 MPa and on-the-fly end-stop adjustments without swapping components. If you need less force, the 40 mm bore offers 628 N; if you require more, the 63 mm bore provides 1559 N. The adjustable stroke is ideal for machine setups that undergo frequent product changeovers, replacing the need for fixed-stroke SAI cylinders when the exact end position varies.
Because the 325 mm stroke is relatively long, you should use an external guide to prevent excessive side-loading on the 20 mm rod. For dimensionally interchangeable ISO 15552 replacements, match the 50 mm bore, 325 mm stroke, 30 mm adjustment, PT ports, and your required mounting set (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Remember that the SAIJ rear adjuster is a travel stop, not a lock; for true load-holding without live air, select an SAIL or BSAI cylinder.
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 SAIJ50 Adjustable Cylinder SAIJ50AX325-30 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum pressure of 1.0 MPa, it delivers up to 200 kgf.
The rear adjuster screw lets you shorten the 325 mm nominal stroke by up to 30 mm, creating a 295 to 325 mm usable travel window. This stopper only sets the end position; it does not lock the load without continuous air pressure.
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