Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50 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 SAIJ63AX280-50
The AirTAC SAIJ63X280-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end-of-travel position without swapping out the entire unit. With a nominal 280 mm stroke and a 50 mm adjustment range, it provides a usable travel window of 230 to 280 mm. This flexibility is ideal for dialing in exact retraction distances during machine commissioning or product changeovers. Delivering 1559 N of push force at 0.5 MPa, it handles robust actuation tasks while operating at speeds between 30 and 800 mm/s.
This model features a SUS420J2 stainless steel rod for enhanced durability against moisture and a PT tapered port thread for a reliable pneumatic seal. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount CMSE reed or DMSE electronic switches if position feedback is required later. The rear adjuster acts purely as a mechanical stop to set the travel limit and does not hold the load without continuous air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50 |
|---|---|
| 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 SAIJ63AX280-50
| 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 SAIJ63AX280-50 Is Used
Machine Changeover
Quickly dial in the 230-280 mm retraction stop when switching between product sizes on a packaging line, avoiding the need to physically swap cylinders.
End-Position Tuning
Fine-tune the final resting position of a tooling head during commissioning to achieve exact alignment without adding external mechanical stops.
Variable Length Diverter
Adjust the stroke on a conveyor diverter gate on the fly to handle different carton lengths while maintaining consistent 1559 N push force.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-50 the Right Cylinder?
Selecting this 63 mm bore cylinder makes sense when your application requires 1559 N of push force at 0.5 MPa, bridging the gap between the 50 mm bore (982 N) and the larger 80 mm bore (2513 N). The adjustable stroke is chosen over a fixed-stroke SAI cylinder when you need variable end-stops to accommodate multiple product sizes on the same line. To replicate this setup, match the 63 mm bore, 280 mm stroke, 50 mm adjustment, PT port, and SUS420J2 rod material.
Because the total stroke is 280 mm, the M16x1.5 rod experiences increased leverage forces, so an external guide is recommended to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster is a travel stop, not a locking mechanism; if you need to hold a load securely without live air pressure, consider an AirTAC SAIL or BSAI cylinder instead. This SAIJ model uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
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 SAIJ63AX280-50 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm from the nominal 280 mm, providing a usable travel window of 230 to 280 mm. This stopper sets the end position but does not lock the load without continuous air pressure.
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