Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 280mm 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
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50S
The AirTAC SAIJ63X280-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 280 mm stroke that can be fine-tuned backward by up to 50 mm, yielding a precise 230-280 mm usable travel window. Delivering 1559 N of push force at 0.5 MPa, it fits medium-duty applications perfectly.
This variant features an SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and accepts PT tapered port threads for its G3/8 air supply. The integrated magnet (-S) supports position sensing via AirTAC CMSE reed or DMSE electronic switches mounted in the dual-side sensor grooves. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 280 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 SAIJ63AX280-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×280 | 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 SAIJ63AX280-50S Is Used
Product Changeover
Dial in the 230-280 mm travel window during format size changes on packaging lines, avoiding the need to physically swap cylinders for different carton lengths.
Commissioning Calibration
Fine-tune the exact end-of-stroke position at machine setup using the rear stopper, preventing hard mechanical crashes while dialing in the perfect 1559 N push stroke.
Variable End Stops
Adjust the retraction point on the fly for automated assembly tooling, allowing one actuator to handle multiple part heights without external stop blocks.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50S the Right Cylinder?
Select this 63 mm bore when you need 1559 N push force at 0.5 MPa, stepping up from a 50 mm bore (982 N) or down from an 80 mm bore (2513 N). The 50 mm rear adjuster is chosen over a fixed SAI cylinder when you need variable end-stops for product changeovers without physically swapping the actuator. Because the 280 mm stroke exceeds 300 mm is false here, but long travel still warrants external guidance to manage side loads.
For ISO 15552 replacement matching, specify the 63 mm bore, 280 mm stroke, 50 mm adjustment, PT port thread, and the -S magnet. Remember that the rear adjuster acts only as a travel stop to tune deceleration, not as a locking device. To hold a load securely without live air pressure, integrate an external pilot-operated check valve or select the AirTAC SAIL or BSAI locking cylinder series.
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 SAIJ63AX280-50S FAQ
At 0.5 MPa operating pressure, 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 screw allows you to shorten the effective stroke by up to 50 mm. This creates a usable travel window of 230-280 mm from the 280 mm nominal stroke, letting you set the exact end position without adding external stops.
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