Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X800-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X800-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 800mm 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
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X800-50S
The AirTAC SAIJ63X800-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the effective travel back by up to 50 mm. This yields a usable end-position window of 750-800 mm, allowing you to fine-tune the retract stop at commissioning without adding external physical stops. In the 63 mm bore class, it delivers 2182 N of push force and 1402 N of pull force at 0.7 MPa.
Because the 800 mm stroke is long relative to the 20 mm rod diameter, an external guide is recommended to manage side loads and prevent rod deflection. This -S variant includes a magnet for position sensing, supporting AirTAC CMSE reed and DMSE solid-state switches housed in the dual-side sensor grooves of the extruded aluminum barrel.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X800-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X800-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 800 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 SAIJ63X800-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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 SAIJ63X800-50S Is Used
Machine Changeover Setup
Dial in the exact 750-800 mm retract position during product changeovers without physically swapping cylinders or repositioning external stopper blocks.
Variable End-Stop Pushing
Adjusts the pusher end position on a conveyor line by up to 50 mm to accommodate different carton lengths or package sizes on the fly.
Long-Stroke Assembly Pressing
Provides 2182 N of thrust at 0.7 MPa for long-travel pressing tasks, with the rear screw allowing precise final height calibration during commissioning.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X800-50S the Right Cylinder?
Choose this 63 mm bore if your application requires around 2182 N of thrust at 0.7 MPa; stepping down to a 50 mm bore drops the push force to 1374 N, while moving up to an 80 mm bore provides 3518 N. The adjustable 750-800 mm travel window is ideal for product changeovers on a line where exact end positions vary slightly between fixtures. Instead of swapping out a fixed-stroke SAI cylinder, you simply dial in the rear screw.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 800 mm nominal stroke, 50 mm adjustment range, PT G3/8 port thread, and -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2—omitting FB, CA, CB, and CR. Remember that the rear adjuster acts only as a travel stop; it does not hold the load without live air. For true fail-safe load holding, use an 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 SAIJ63X800-50S FAQ
At a 0.7 MPa operating pressure, this 63 mm bore cylinder generates 2182 N of push force and 1402 N of pull force. The maximum thrust is 318 kgf at 1.0 MPa.
The external rear adjuster screw lets you shorten the 800 mm nominal stroke by up to 50 mm, creating a 750-800 mm usable travel window. It functions as a mechanical stop to fine-tune the end position and does not lock the load without continuous air pressure.
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