Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20 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 SAIJ63X900-20
The AirTAC SAIJ63X900-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 20mm adjustment range, creating a usable travel window of 880 to 900mm for precise end-position tuning at commissioning. Delivering 2182N of push force at 0.7 MPa, it handles robust actuation tasks.
This model uses a standard carbon steel rod with an M16x1.5 thread and G3/8 PT tapered ports. It includes variable air cushions at both ends to decelerate the load smoothly. The rear adjuster acts purely as a mechanical stop to set the travel end and does not lock or hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20 |
|---|---|
| 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 SAIJ63X900-20
| 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 SAIJ63X900-20 Is Used
Machine Changeover
Dial in the exact 880-900mm end-stop during product size transitions on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract stroke at commissioning to compensate for mechanical tolerance stack-up in long-travel assemblies.
Variable End Stops
Adjust the travel limit on the fly for sorting diverter arms that handle different package lengths on a shared conveyor.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X900-20 the Right Cylinder?
Choose this 63mm bore when a 50mm bore (1374N push at 0.5 MPa) is too weak, but an 80mm bore (3518N push at 0.5 MPa) would be excessive overkill. The 20mm adjustable stroke is ideal for variable end-stops during machine setup or product changeover, avoiding the need to swap out a fixed-stroke SAI cylinder or bolt on external stops. For exact ISO 15552 replacement, match the 63mm bore, 900mm stroke, 20mm adjuster, G3/8 PT ports, and standard mounting.
Because the 900mm stroke is quite long, an external guide is recommended to prevent excessive side-loading on the M16x1.5 rod. Remember that the rear screw and air cushion only decelerate the travel end; if you need true load-holding without live air, consider the SAIL (air-released lock) or BSAI (clamp-lock) series instead. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ63X900-20 FAQ
At 0.7 MPa operating pressure, this 63mm bore cylinder provides a push force of 2182N and a pull force of 1402N. It can reach a maximum push force of 2805N at 1.0 MPa.
The rear adjuster screw lets you trim the effective travel back by up to 20mm, giving a usable stroke window of 880 to 900mm. The adjuster is a mechanical stop that sets the end position and does not function as a lock or brake.
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