Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20 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 SAIJ63AX280-20
The AirTAC SAIJ63X280-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a 1559 N push force at 0.5 MPa and provides a usable travel window of 260 to 280 mm, letting you dial in the exact retract end-position during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for straightforward switch mounting.
This specific configuration incorporates a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and utilizes PT tapered port threads with a G3/8 connection. The 20 mm adjustment screw acts purely as a mechanical stop to fine-tune travel without swapping cylinders, while the standard variable air cushions handle end-of-stroke deceleration.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20 |
|---|---|
| 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 SAIJ63AX280-20
| 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 SAIJ63AX280-20 Is Used
Changeover Calibration
Perfect for packaging lines requiring rapid product size changeovers, using the 20 mm adjuster to set the exact 260-280 mm retract distance without changing hardware.
End-Position Trimming
Ideal for machining fixtures where the final clamping position must be fine-tuned on-site, leveraging the rear stop screw to dial out mechanical slack.
Assembly Line Actuation
Provides reliable double-actuation for automated assembly presses, using standard air cushions to decelerate the load smoothly within the adjustable travel window.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX280-20 the Right Cylinder?
Select this 63 mm bore when an application requires approximately 1559 N of push force at 0.5 MPa, stepping up from a 50 mm bore that yields 982 N, or down from an 80 mm bore that provides 2513 N. The adjustable 260-280 mm window is ideal for product changeovers on a line, whereas a fixed-stroke SAI cylinder is better suited for rigid, unchanging end-positions. Because the stroke is 280 mm, ensure external guiding is used to prevent excessive side-loading on the rod.
To match this exact unit for an ISO 15552 replacement, specify: 63 mm bore, 280 mm nominal stroke, 20 mm adjustment, PT G3/8 ports, SUS420J2 rod, and no magnet. Note that the rear adjuster is a travel stop, not a locking device; it will not hold a load without continuous air pressure. For true load-holding, consider an external rod lock or the AirTAC SAIL series. Mounting options include 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 SAIJ63AX280-20 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates a push force of 1559 N and a pull force of 1402 N. At the maximum 1.0 MPa pressure, it achieves a push force of 318 kgf.
The rear adjuster screw allows you to mechanically shorten the effective stroke within a 260 to 280 mm window. It acts as a hard stop to set the retract position precisely, but it is not a lock and requires live air to maintain the load.
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