Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50S 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 SAIJ63AX240-50S
The AirTAC SAIJ63X240-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 240 mm stroke that can be dialed back by up to 50 mm, yielding a precise 190-240 mm usable travel window for commissioning. Fitted with a PT tapered G3/8 port and an SUS420J2 stainless steel rod, it delivers a 1402 N pull force at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet supports position detection.
This adjustable-stroke design allows you to fine-tune end positions without swapping hardware or adding external stops. The rear adjuster acts purely as a travel stop, not a lock, meaning it cannot hold loads without live air. For applications requiring true load-holding without pressure, consider the SAIL or BSAI series instead. Variable air cushions at both ends manage deceleration across its 30-800 mm/s speed range.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50S |
|---|---|
| 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 SAIJ63AX240-50S
| 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 SAIJ63AX240-50S Is Used
Machine Changeover
Dial in the exact 190-240 mm end position during product size transitions without disassembling tooling or adding external stops.
End-Position Tuning
Fine-tune the retract stroke up to 50 mm during commissioning to absorb mechanical tolerance and achieve precise stopping.
Automated Assembly
Apply up to 1402 N of pull force at 0.5 MPa to retract assemblies, using the rear adjuster to synchronize multiple stations.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-50S the Right Cylinder?
Choose this 63 mm bore when you need more force than the 50 mm bore (825 N pull at 0.5 MPa) but less bulk than the 80 mm option (2268 N pull). The 50 mm adjustment range is ideal for product-size changeovers on a line, letting you shift the end-stop by up to 50 mm on the fly. Because the stroke is 240 mm, an external guide is recommended to prevent excessive side-loading on the 20 mm rod. When specifying a replacement, match the 63 mm bore, 240 mm stroke, 50 mm adjuster, PT G3/8 port, SUS420J2 rod, and the -S magnet. SAIJ uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ63AX240-50S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can reach up to 2182 N push at 0.7 MPa.
The rear adjuster acts as a mechanical stop that trims the effective travel. For this model, it shortens the 240 mm nominal stroke to any length within a 190-240 mm window, but it does not lock the load without live air pressure.
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