Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-50 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 SAIJ63X900-50
The AirTAC SAIJ63X900-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 850 to 900 mm, allowing you to dial back the nominal 900 mm stroke by up to 50 mm during machine commissioning. Delivering 1559 N of push force and 1402 N of pull force at 0.5 MPa, it handles robust actuation tasks without requiring external stops.
This 63 mm bore unit uses a G3/8 port and a 20 mm carbon steel rod with an M16x1.5 thread, providing solid resistance to side loads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR configurations.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-50 |
|---|---|
| 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 SAIJ63X900-50
| 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 SAIJ63X900-50 Is Used
Machine Changeover
Dial in the exact 850 to 900 mm end-stop during product size transitions without physically swapping the cylinder or adding external shims.
Conveyor End-Positioning
Fine-tune the retract stroke on long-transfer conveyors to accommodate varying package lengths at commissioning.
Assembly Press Tuning
Adjust the rear stopper to set precise end-of-stroke positions for varying component heights during automated assembly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-50 the Right Cylinder?
Choose this adjustable-stroke model when your application requires fine-tuning of the end position at setup or during product changeover, rather than relying on a fixed-stroke SAI cylinder. If you need less force, stepping down to a 50 mm bore yields 982 N of push at 0.5 MPa. For higher force requirements, stepping up to an 80 mm bore provides 2513 N.
Because the 900 mm stroke is substantial, an external guide is recommended to prevent rod sag and manage side loads. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for true load-holding, consider the SAIL or BSAI series. This cylinder is dimensionally interchangeable per ISO 15552, featuring a PT tapered port thread and no magnet.
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 SAIJ63X900-50 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can deliver up to 318 kgf at its maximum 1.0 MPa pressure rating.
The rear adjuster screw acts as an external stopper, allowing you to shorten the effective travel from the nominal 900 mm down to 850 mm. It sets the retract end position but does not lock or hold the load without continuous air pressure.
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