Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50 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 SAIJ63AX325-50
The AirTAC SAIJ63X325-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position at commissioning. It provides a usable travel window of 275 to 325 mm, letting you dial back the nominal stroke by up to 50 mm without adding external stops. In the 63 mm bore class, it delivers 2182 N of push force and 1402 N of pull force at 0.7 MPa, making it well-suited for medium-duty handling tasks.
This variant features a SUS420J2 stainless steel rod for improved corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet. It supports a reduced set of ISO 15552 mounting interfaces: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50 |
|---|---|
| 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 SAIJ63AX325-50
| 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 SAIJ63AX325-50 Is Used
Product Changeover
Quickly reconfigure the retract end position up to 50 mm during a packaging line format change without swapping out the entire cylinder.
End-Position Tuning
Dial in the exact 275 to 325 mm travel distance during machine commissioning to perfect a pressing or clamping operation.
Variable End Stops
Use the rear stopper screw to adapt the stroke for different material lengths on the fly, avoiding the need for fixed mechanical spacers.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-50 the Right Cylinder?
Choose this 63 mm bore when your application requires more thrust than a 50 mm cylinder (which provides 1374 N push at 0.7 MPa) but does not need the bulk of an 80 mm model (3518 N push). The 50 mm adjustment range is ideal for machines that process varying product sizes, allowing the retract end-stop to be reconfigured on the fly. For load-holding without live air pressure, note that the rear adjuster is strictly a travel stop, not a lock; you would need an SAIL or BSAI cylinder, or an external pilot-operated check valve, to hold a load safely.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 325 mm stroke, 50 mm adjustment range, PT port thread, and the appropriate mounting accessory. Because the 325 mm stroke is relatively long, the 20 mm rod diameter and M16x1.5 rod thread will carry some side-load, but an external guide is recommended to prevent rod binding over extended unsupported travel.
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 SAIJ63AX325-50 FAQ
At an operating pressure of 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster acts as a mechanical stop that can shorten the effective travel by up to 50 mm. This creates a usable stroke window of 275 to 325 mm, allowing you to fine-tune the retract position without replacing the cylinder.
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