Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-30S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-30S
The AirTAC SAIJ63X850-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 820 to 850 mm. Delivering 1559 N of pull force at 0.5 MPa, it suits substantial actuation tasks. The carbon steel piston rod features an M16x1.5 thread, offering robust mounting for heavy payloads.
This variant includes a magnet for position sensing via CMSE reed or DMSE electronic switches. The external rear stopper allows precise end-position tuning at commissioning without adding external stops. The adjuster acts solely as a travel stop and does not hold the load without live air; for position holding, consider SAIL or BSAI types.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-30S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 850 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 SAIJ63X850-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×850 | 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 SAIJ63X850-30S Is Used
Machine Changeover
Dial in the exact retract position within the 820-850 mm window when switching product sizes on a packaging line, avoiding mechanical rebuilds.
Variable End-Stop Diverter
Fine-tune the actuation endpoint of a diverter arm on the fly to accommodate varying package lengths without adding external hard stops.
Press Stroke Tuning
Precisely set the bottom dead center of a light pressing or stamping operation during setup, using the rear screw to compensate for tooling wear.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-30S the Right Cylinder?
Choose this 63 mm bore when a 40 mm bore (528 N pull) is insufficient but an 80 mm bore (2268 N pull) is oversized. The 30 mm adjustment window is perfect for product changeovers on a line, allowing you to fine-tune the retract stroke on the fly rather than swapping a fixed SAI cylinder. It uses a PT tapered G3/8 port and the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Because the 850 mm stroke is substantial, the unsupported rod is prone to deflection under side loads; always guide the load externally to prevent seal damage. This model is dimensionally interchangeable per ISO 15552 and includes the -S magnet for sensors.
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 SAIJ63X850-30S FAQ
At 0.5 MPa, it provides 1559 N of pull force and 1402 N of push force. At the maximum operating pressure of 1.0 MPa, it can deliver up to 318 kgf.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 30 mm, creating an 820 to 850 mm usable travel window. It is a stop, not a lock, so it will not hold the load without live air pressure.
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