Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 900mm 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
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-40S
The AirTAC SAIJ63X900-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 900 mm stroke that can be fine-tuned backward by up to 40 mm, creating an exact 860-900 mm usable travel window for precise product changeovers. Driven by a G3/8 port, it delivers 1559 N of pull force at 0.5 MPa.
This variant includes a magnetic piston for position detection via AirTAC CMSE reed or DMSE electronic sensors. The extruded aluminum barrel features sensor grooves on both sides, and the standard carbon steel rod handles robust cycling. The rear adjuster acts purely as a mechanical stop to set the end position, meaning it does not lock or hold the load without continuous live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 900 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 SAIJ63X900-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×900 | 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 SAIJ63X900-40S Is Used
Variable End-Stop Positioning
Dial in the exact retraction point within the 860-900 mm window during machine setup to accommodate different product lengths without changing hardware.
Long-Stroke Diverting
Pushes or diverts items across a wide conveyor belt, using the 900 mm travel to reach distant lanes while relying on the adjuster to prevent overtravel.
Product Size Changeover
Quickly reconfigure automated machinery for new packaging dimensions by turning the rear screw to shorten the effective stroke by up to 40 mm.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-40S the Right Cylinder?
Choose this 63 mm bore when you need 1559 N pull force at 0.5 MPa and on-the-fly end-position tuning without swapping cylinders or adding external stops. If your application requires less force, stepping down to a 50 mm bore yields 825 N of pull force; stepping up to an 80 mm bore provides 2268 N. Because the 900 mm stroke is long, an external guide is strongly recommended to prevent excessive side-loading on the piston rod.
The adjustable stroke is ideal for commissioning fine-tunes and variable end-stops, whereas a fixed SAI cylinder is better for fixed repeated cycles. For exact ISO 15552 replacement matching, specify the 63 mm bore, 900 mm stroke, 40 mm adjustment, PT tapered port thread, and the -S magnet. Remember that neither the rear adjuster nor the air cushions function as a lock; for load-holding without live pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ63X900-40S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of pull force and 1559 N of push force. At the maximum 1.0 MPa pressure, it achieves a push force of 3118 N.
The rear adjuster acts as a mechanical stop that lets you shorten the 900 mm nominal stroke by up to 40 mm, providing an effective travel range of 860 to 900 mm. It only sets the end position and does not hold the load without live air pressure.
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