Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50
The AirTAC SAIJ63X300-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 250-300 mm usable travel window, allowing you to dial back the nominal 300 mm stroke by up to 50 mm during commissioning. This bore size delivers 2182 N of push force at 0.7 MPa, making it well-suited for moderate-to-heavy actuation. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This specific configuration uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads. The rear adjuster functions strictly as a travel stop to set the end position; it does not lock the load without continuous live air pressure. For applications requiring true load-holding upon air loss, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAIJ63AX300-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SAIJ63AX300-50 Is Used
End-Position Tuning
Fine-tune the retract end-stop within the 250-300 mm window during machine commissioning without physically swapping hardware.
Product Changeover
Quickly adjust the stroke length on automated lines when handling different product sizes or varying material heights.
Variable Stops
Set precise travel limits for multi-format machinery setups, replacing fixed stops with a dialed-in rear screw mechanism.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-50 the Right Cylinder?
Choose this 63 mm bore when you need 2182 N push force (at 0.5 MPa it yields 1559 N). If your application requires less force, stepping down to a 50 mm bore provides 982 N at 0.5 MPa, while moving up to an 80 mm bore offers 2513 N at 0.5 MPa. The adjustable stroke is ideal for product changeovers or fine-tuning end positions without swapping the cylinder or adding external stops. Because the nominal stroke is 300 mm, an external guide is recommended to manage side-load risks on the M16x1.5 rod thread.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 300 mm stroke, 50 mm adjustment range, PT G3/8 port, and mounting interface. SAIJ supports a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. This unit lacks a magnet, so it requires external sensing if position feedback is needed.
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 SAIJ63AX300-50 FAQ
At 0.7 MPa operating pressure, this 63 mm bore cylinder generates 2182 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it reaches up to 318 kgf.
A rear adjusting screw acts as a stopper, allowing you to shorten the effective stroke from 300 mm down to 250 mm. This screw only sets the travel end and does not hold the load without live air pressure.
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