Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50S 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 SAIJ63AX325-50S
The AirTAC SAIJ63X325-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 2182N push force at 0.7MPa while providing a usable travel window of 275 to 325mm, letting you dial back the nominal 325mm stroke by up to 50mm. This built-in adjustability allows for precise end-position tuning at commissioning without swapping out the physical cylinder or adding external stops.
This specific configuration features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the rear adjuster functions strictly as a travel stop to set deceleration, not as a lock to hold loads without live air.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50S |
|---|---|
| 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 SAIJ63AX325-50S
| 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 SAIJ63AX325-50S Is Used
Machine Setup Changeover
Dial in the exact 275 to 325mm end-position during machine commissioning or product size changes without machining new hard stops.
Variable End-Stop Positioning
Fine-tune the retract stroke by up to 50mm on the fly to accommodate multiple part lengths on a single assembly fixture.
Corrosive Assembly Lines
Leverage the SUS420J2 stainless steel rod and 2182N thrust for reliable actuation in packaging lines requiring washdowns.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50S the Right Cylinder?
Choose this 63mm bore adjustable-stroke model when your application requires 2182N of push force at 0.7MPa and variable end-stop positioning during product changeovers. If you need less force, the 50mm bore provides 1374N; if your application demands more, stepping up to the 80mm bore yields 3518N. The rear screw mechanism fine-tunes the retract end without the rigid constraints of a fixed-stroke SAI cylinder.
For ISO 15552 interchangeability, match the 63mm bore, 325mm nominal stroke, 50mm adjustment range, PT tapered port threads, and the -S magnet option. Because the stroke is 325mm, the M16x1.5 rod should be guided externally to prevent excessive side-loading and premature seal wear. If true load-holding without live air pressure is required, consider the SAIL or BSAI series instead, as the SAIJ adjuster is not a brake.
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 SAIJ63AX325-50S FAQ
This 63mm bore cylinder provides 1559N of push force and 1402N of pull force at 0.5MPa. At 0.7MPa, the push force increases to 2182N.
A rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective travel from the 325mm nominal stroke down to a minimum of 275mm. This creates a 275-325mm usable window for fine-tuning without replacing the cylinder.
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