Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 325mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S
The AirTAC SAIJ63X325-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 325 mm nominal travel to create a precise 305-325 mm usable window. It delivers 2182 N of push force at 0.7 MPa, matching the standard SAI force class for this bore. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches.
This variant features a SUS420J2 stainless steel rod for improved corrosion resistance and uses PT tapered port threads. Because the stroke extends past 300 mm, the M16x1.5 rod and thread should be paired with an external guide to manage side loading on longer travels.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 325 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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, 36 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S Is Used
Machine Changeover
Quickly modify the 325 mm stroke end-stop to accommodate different product lengths on a packaging line without changing hardware.
End-Position Tuning
Dial in the exact 305 to 325 mm travel window during setup to perfect seating force and timing against hard stops.
Assembly Line Actuation
Drive heavy press or clamping fixtures with 2182 N of thrust at 0.7 MPa while retaining on-the-fly stroke adjustments.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S the Right Cylinder?
Select this adjustable model over a fixed SAI when you need to fine-tune the retract end-position at commissioning or during a product changeover without swapping the cylinder or adding external stops. If your application requires less force, stepping down to a 50 mm bore yields 1374 N push at 0.5 MPa; stepping up to an 80 mm bore provides 3518 N at 0.7 MPa.
Remember that the rear adjuster acts purely as a travel stop for deceleration, not a lock; the SAIJ will not hold a load without live air. For dead-end holding without pressure, consider an external rod lock or the AirTAC SAIL series. This unit is dimensionally interchangeable per ISO 15552 and supports the SAIJ 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-20S FAQ
At 0.7 MPa it provides 2182 N of push force and 1402 N of pull force. The operating speed range for this 63 mm bore is 30-800 mm/s.
The rear adjuster acts as a stopper that lets you shorten the effective travel by up to 20 mm, creating a 305 to 325 mm usable stroke window. It sets the travel end and aids deceleration, but it does not lock the load without continuous air pressure.
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