Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 240mm 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
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20
The AirTAC SAIJ63X240-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 220 to 240 mm, enabling precise end-position tuning without swapping components. Equipped with a G3/8 PT tapered port and a 20 mm rod diameter, it delivers 1559 N of push force at 0.5 MPa and 2182 N at 0.7 MPa.
This variant uses an SUS420J2 stainless steel rod (material code A) for improved corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE reed or DMSE electronic switches later if needed. The rear screw acts purely as a travel stop to decelerate the piston, so it cannot hold a load without continuous live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAIJ63AX240-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SAIJ63AX240-20 Is Used
Changeover Calibration
Dial in the 220-240 mm travel window during machine setup to accommodate different product lengths without replacing the cylinder.
Variable End-Stop Positioning
Use the rear adjuster to fine-tune the retract end position precisely during commissioning, avoiding the need for external mechanical stops.
Assembly Line Actuation
Push and pull payloads with 1559 N force at 0.5 MPa while making quick mechanical adjustments to adapt the stroke for varied fixture sizes.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-20 the Right Cylinder?
Select this 63 mm bore when a 50 mm bore (982 N push at 0.5 MPa) is too weak but an 80 mm bore (2513 N) is oversized. The 20 mm adjustment range is ideal for product changeovers, letting you dial in the exact retract distance on the fly instead of machining external stopper blocks. For load-holding without air pressure, you would need a different type like the SAIL or BSAI rather than this standard adjuster.
To match this ISO 15552 cylinder for a direct replacement, verify the 240 mm stroke, 20 mm adjustment range, G3/8 PT port, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Since the 240 mm stroke is under the 300 mm side-load threshold, the standard M16x1.5 rod thread handles typical loads well without requiring an external guide.
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 SAIJ63AX240-20 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 lets you shorten the nominal 240 mm stroke by up to 20 mm, creating a usable travel window of 220 to 240 mm. This stopper only limits the travel end and does not lock the load without live air pressure.
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