Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X550-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X550-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 550mm 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
- Stroke550 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X550-50S
The AirTAC SAIJ63X550-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to fine-tune the retract end position by up to 50 mm. This yields a usable travel window of 500 to 550 mm, letting you dial in the exact end-of-stroke stop during commissioning without adding external stops. It delivers a robust push force of 2182 N at 0.7 MPa, making it well-suited for mid-range actuation tasks.
This variant includes a standard -S magnet for position sensing with AirTAC CMSE reed or DMSE electronic solid-state switches fitted into the dual-side sensor grooves on the extruded aluminum barrel. It uses a G3/8 port and a 20 mm carbon steel rod with an M16x1.5 thread. The rear adjuster acts purely as a travel stop and works alongside the standard adjustable air cushions at both ends; it is not a lock and will not hold a load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X550-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X550-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 550 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 SAIJ63X550-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×550 | 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 SAIJ63X550-50S Is Used
Machine Changeover
Dial in the 500-550 mm retract stop during product size changes without swapping the cylinder or bolting on external physical stops.
End-Position Tuning
Fine-tune the exact end-of-stroke contact point at commissioning to absorb mechanical tolerances across the tooling layout.
Variable Stroke Diverter
Adjust the travel window on a sorting line to push varying package lengths accurately without reprogramming the entire machine.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X550-50S the Right Cylinder?
Choose this 63 mm bore when you need higher thrust than a 50 mm bore (which provides 1374 N at 0.7 MPa) but want to avoid the bulk of an 80 mm bore (3518 N at 0.7 MPa). The adjustable 500-550 mm travel window is ideal for product changeovers or fine-tuning end positions on the fly, offering flexibility a fixed-stroke SAI cylinder cannot match. For applications requiring the load to be held safely without continuous air pressure, this cylinder is not sufficient; consider the SAIL (air-released lock) or BSAI (clamp-lock) series instead.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 550 mm nominal stroke, 50 mm adjustment range, G3/8 PT tapered port, and the -S magnet requirement. Because the 550 mm stroke is long, the 20 mm rod can experience leverage forces; ensure you use an external guide rail to prevent side-load damage to the seals and rod bearing.
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 SAIJ63X550-50S FAQ
At 0.7 MPa operating pressure, this 63 mm bore cylinder generates a push force of 2182 N and a pull force of 1402 N. It can deliver up to 2805 N at its maximum 0.9 MPa pressure.
The rear adjuster screw lets you shorten the effective stroke by up to 50 mm, providing a usable travel window of 500 to 550 mm. The adjuster is a mechanical stop for end-position tuning and does not lock or hold the load without live air pressure.
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