Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-10
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-10
The AirTAC SAIJ63X250-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 240-250 mm, allowing you to dial back the nominal 250 mm stroke by up to 10 mm. This fine-tuning capability at commissioning eliminates the need to swap the cylinder or add external stops when aligning end positions. Delivering a push force of 1559 N at 0.5 MPa, it is built with a SUS420J2 stainless steel rod and a PT tapered port thread.
The extruded aluminum barrel includes sensor grooves on both sides for straightforward switch mounting. The rear adjuster acts purely as a mechanical stop to set the travel end and is not a lock; it will not hold a load without live air pressure. For load-holding requirements without continuous pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-10 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAIJ63AX250-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SAIJ63AX250-10 Is Used
Machine Changeover
Dial in the exact 240-250 mm end position during product size changes without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract stroke by up to 10 mm at commissioning to perfectly align tooling or seating forces on the assembly line.
Variable End Stops
Set a precise travel limit within the 240-250 mm window for automated clamping or pressing tasks that require strict positional accuracy.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-10 the Right Cylinder?
Choose this 63 mm bore if you need the 1559 N thrust at 0.5 MPa and require precise end-position tuning during machine setup or product changeover. If your application demands less force, stepping down to a 50 mm bore yields 982 N, while an 80 mm bore provides 2513 N. The adjustable stroke is ideal for variable end stops, whereas a fixed SAI cylinder is better suited for rigid, unchanging travel. When replacing an ISO 15552 cylinder, match the 63 mm bore, 250 mm stroke, 10 mm adjustment, G3/8 port, and PT thread. Because the 250 mm stroke is significant, ensure external guides are used to support the load and prevent excessive side-loading on the rod.
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 SAIJ63AX250-10 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder delivers a push force of 1559 N and a pull force of 1402 N. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw lets you shorten the 250 mm nominal stroke by up to 10 mm, creating a usable travel window of 240-250 mm. The adjuster functions as a mechanical stop to set the travel end and does not lock or hold the load without live air pressure.
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