Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 950mm 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
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-40
The AirTAC SAIJ63X950-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal travel of 950 mm and a 40 mm adjustment range, you can dial back the effective stroke to anywhere within a 910 to 950 mm window. This allows precise end-position tuning at commissioning without swapping hardware. At 0.5 MPa, it delivers 1559 N of push thrust and 1402 N of pull thrust.
Equipped with a G3/8 port and a 20 mm diameter carbon steel rod with an M16x1.5 thread, this bore size handles robust loads. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. The rear adjuster functions strictly as a travel stop for deceleration and end-position setting; it does not lock the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 950 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 SAIJ63X950-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×950 | 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 SAIJ63X950-40 Is Used
Machine Changeover
Dial in the 910-950 mm travel window during product size transitions without physically replacing the cylinder or repositioning hard stops.
End-Position Tuning
Fine-tune the retract stroke end during commissioning to absorb mechanical tolerances and achieve exact positioning.
Long-Stroke Conveying
Use the 63 mm bore thrust to push or index heavy pallets over a 950 mm distance, adjusting the stop as needed for different load sizes.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-40 the Right Cylinder?
Choose this 63 mm bore when 50 mm (982 N push at 0.5 MPa) is too weak, but 80 mm (2513 N) is oversized. The adjustable stroke is selected over a fixed SAI when a machine requires variable end-stops or product changeover without adding external stops. For drop-in replacements, match the 950 mm stroke, 40 mm adjuster, PT port thread, and standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the 950 mm stroke is long, an external guide is recommended to prevent rod side-loading and premature seal wear. For load-holding without live air, select a SAIL or BSAI cylinder instead.
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 SAIJ63X950-40 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. The operational speed range is 30-800 mm/s.
The rear adjuster acts as a mechanical stop that shortens the 950 mm nominal stroke by up to 40 mm, creating a usable travel window of 910 to 950 mm. It sets the end position but does not hold the load without air pressure.
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