Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-75S 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 SAIJ50AX325-75S
The AirTAC SAIJ50X325-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 250 to 325 mm usable travel window. It delivers 982 N of push thrust and 825 N of pull thrust at 0.5 MPa, driven by a 20 mm SUS420J2 stainless steel rod. The barrel is extruded aluminum with sensor grooves on both sides.
Equipped with a magnet for position sensing, this unit works seamlessly with AirTAC CMSE reed and DMSE electronic switches. The PT G1/4 port and M16x1.5 rod thread provide a robust interface, while the 30 mm cushioning at both ends ensures smooth deceleration across its 30-800 mm/s speed range.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-75S |
|---|---|
| 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 SAIJ50AX325-75S
| 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 SAIJ50AX325-75S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 250 and 325 mm during machine setup to accommodate different material lengths without swapping hardware.
Product Changeover
Quickly reconfigure the stroke end-point on a packaging line when switching to a new carton size, minimizing downtime.
Assembly Press Tuning
Fine-tune the final pressing depth of a 982 N assembly operation at commissioning to avoid over-travel and part damage.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX325-75S the Right Cylinder?
Choose this 50 mm bore when an application requires 982 N of push force at 0.5 MPa but demands an external end-stop for product changeovers, rather than a fixed-stroke SAI cylinder. If you need higher force, stepping up to a 63 mm bore yields 1559 N at 0.5 MPa; for lighter duties, a 40 mm bore provides 628 N.
Because the 325 mm stroke exceeds 300 mm, an external guide is recommended to prevent side-load wear on the rod seals. The rear adjuster acts strictly as a travel stop, not a lock; the SAIJ does not hold loads without live air, so for fail-safe holding, consider an SAIL or BSAI cylinder. This SAIJ uses the reduced mounting set: 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 SAIJ50 Adjustable Cylinder SAIJ50AX325-75S FAQ
At 0.5 MPa, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 200 kgf of push force.
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm, creating a usable travel window of 250 to 325 mm. This stopper only sets the end position; it does not lock or hold the load without continuous air pressure.
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