This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X565S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI50 Standard Cylinder SI50X565S
The AirTAC SI50 Standard Cylinder SI50X565S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 565mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X565S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke565 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X565S
- 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 SI50 Standard Cylinder SI50X565S
The AirTAC SI50X565S is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 565 mm stroke. It delivers 982 N push force at 0.5 MPa via a G1/4 port. AirTAC replaced this legacy unit with the SAI50X565S, a direct upgrade retaining the exact ISO 15552 mounting interface, stroke, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line. The -S magnet supports CS1-B/DS1-B sensors.
Airtac SI50 Standard Cylinder SI50X565S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X565S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X565S |
| Bore size | Ø50 mm |
| Stroke | 565 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50X565S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50X565S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50X565S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×565 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI50 Standard Cylinder SI50X565S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines using the full 565 mm travel, relying on external guides to prevent rod bending during lateral diversion.
Component Ejection
Clears machined parts from fixtures using 982 N of push force at 0.5 MPa, cycling safely within the 30-800 mm/s speed range.
Replacing the Airtac SI50 Standard Cylinder SI50X565S with the SAI50X565S
To replace the SI50X565S, order the SAI50X565S and confirm the ISO 15552 mounting interface, 50 mm bore, 565 mm stroke, G1/4 port, and M16x1.5 rod thread. Keep the -S magnet for current AirTAC switches. For sizing, neighboring bores are 40 mm (628 N push @0.5 MPa) and 63 mm (1559 N push @0.5 MPa). Because this is a 565 mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts without live air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X565S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50X565S FAQ
Yes, the SI50X565S is discontinued. The direct replacement is the SAI50X565S. It is dimensionally interchangeable per ISO 15552, matching the 50 mm bore, 565 mm stroke, output force, G1/4 port, and mounting accessories.
The G1/4 port bore delivers a push force of 982 N and a pull force of 825 N at 0.5 MPa. At 0.7 MPa it pushes 1374 N, and at 0.9 MPa it pushes 1767 N. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X565S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X565S replacement — usually within 7-8 hours.