Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50S 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 SAIJ63AX250-50S
The AirTAC SAIJ63X250-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 1559N of push force at 0.5MPa and features a 50mm adjustment range, creating a usable travel window of 200-250mm for precise end-position tuning during commissioning.
This variant includes a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and carries an integrated magnet (-S) for position detection. It operates at speeds between 30-800mm/s and uses a PT G3/8 port, while the extruded aluminum barrel provides standard sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50S |
|---|---|
| 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 SAIJ63AX250-50S
| 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 SAIJ63AX250-50S Is Used
Product Changeovers
Dial in the 200-250mm travel window during format changes on packaging lines without replacing hardware.
End-Stop Tuning
Fine-tune the retract position at commissioning to perfectly align tooling without external stoppers.
Variable Diverting
Adjust the stroke length on the fly to handle varying package sizes on a single sorting conveyor.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-50S the Right Cylinder?
Choose this 63mm bore when a 40mm bore (628N push at 0.5MPa) lacks the necessary thrust, but an 80mm bore (2513N) would be excessive. The adjustable 200-250mm travel window is ideal for product changeovers, allowing you to fine-tune the retract end position without swapping the cylinder or adding external stops. Because the stroke is 250mm, ensure adequate external guiding to handle side loads.
For a direct ISO 15552 replacement, match the 63mm bore, 250mm stroke, 50mm adjustment, PT G3/8 port, and the -S magnet requirement. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder. The SAIJ mounting set includes 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 SAIJ63AX250-50S FAQ
The rear adjuster acts as a mechanical stop that trims the effective travel. For this model, the 250mm nominal stroke can be dialed back by up to 50mm, resulting in a usable 200-250mm travel window.
At 0.5MPa operating pressure, it provides 1559N of push force and 1402N of pull force. At 0.7MPa, the push force increases to 2182N.
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