This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X360, 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 SI50X360
The AirTAC Airtac SI50 Standard Cylinder SI50X360 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 360mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X360, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke360 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X360
- 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 SI50X360
The AirTAC SI50X360 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 360mm stroke. Delivering 982N push force at 0.5MPa through a G1/4 port, it is replaced by the SAI50X360. This direct successor matches the exact interface, bore, stroke, force and mounting hardware.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also introduces SAIL, SAIF and BSAI lock variants the SI lacked. Since this SKU lacks the -S magnet, it cannot take a CS1-B/DS1-B sensor.
Airtac SI50 Standard Cylinder SI50X360 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X360 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X360 |
| Bore size | Ø50 mm |
| Stroke | 360 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 SAI50X360 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 SAI50X360 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 SI50X360
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×360 | 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 SI50X360 Is Used
Package Diverting
Pushes cartons off a main conveyor line using 982N thrust, with the 360mm stroke clearing adjacent guide rails.
Pallet Stop Gate
Acts as a pneumatic stop for pallets entering a wrapping station, handling the 50kg vertical lift margin safely.
Fixture Ejection
Ejects machined aluminum parts from a fixture, using the G1/4 port for rapid cycling within the 30-800 mm/s range.
Replacing the Airtac SI50 Standard Cylinder SI50X360 with the SAI50X360
To replace the SI50X360, order the SAI50X360. Verify the ISO 15552 mounting interface, 50mm bore, 360mm stroke, G1/4 port (PT/G/NPT) and your mounting accessory. Because this is a no-S SKU, it cannot accept a sensor; order a magnet-equipped SAI50X360S if position detection is needed. For sizing, a 40mm bore yields 628N push at 0.5MPa, while a 63mm bore yields 1559N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or SAIL/BSAI variant to hold loads. At 360mm, prevent rod bending by using an external guide to absorb side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X360
- ✓ 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 SI50X360 FAQ
Yes, the SI50X360 is discontinued. The direct replacement is the AirTAC SAI50X360. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 360mm stroke, output force, G1/4 port and mounting interface.
It features a G1/4 air port and provides 982N push / 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200 kgf at 1.0MPa. The 360mm stroke operates at 30-800 mm/s with a 30mm adjustable cushion.
Request a Quote for the SAI50X360
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X360 replacement — usually within 7-8 hours.