This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X460S, 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 SI50X460S
The AirTAC SI50 Standard Cylinder SI50X460S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 460mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X460S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke460 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X460S
- 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 SI50X460S
The AirTAC SI50X460S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 460mm stroke. It delivers 982N push force at 0.5MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI50X460S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, force and port size.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock and valve variants the SI lacked, such as SAIL and BSAI clamp-lock models. Your SI50X460S uses a built-in magnet for legacy CS1-B/DS1-B sensors, which the SAI updates with current AirTAC switches.
Airtac SI50 Standard Cylinder SI50X460S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X460S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X460S |
| Bore size | Ø50 mm |
| Stroke | 460 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 SAI50X460S 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 SAI50X460S 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 SI50X460S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×460 | 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 SI50X460S Is Used
Long-Stroke Diversion
Pushes packages across a transfer line using the 460mm stroke, relying on external guides to absorb side loads during the extended reach.
Component Ejection
Clears machined parts from a fixture over a long distance, using adjustable 30mm air cushions to decelerate the payload at stroke end.
Replacing the Airtac SI50 Standard Cylinder SI50X460S with the SAI50X460S
To replace the discontinued SI50X460S, order the SAI50X460S. Confirm your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 air port, and the M16x1.5 rod thread. The -S magnet carries over, but note that legacy CS1-B/DS1-B sensors are superseded by current AirTAC switches on the SAI. Sizing both ways: this 50mm bore yields 982N push at 0.5MPa; if you need less force, the 40mm bore offers 628N. For load holding, note that a plain cylinder drifts on air loss—the cushion only decelerates. Use an external pilot check valve, or switch to the SAIL or BSAI lock variant. Because 460mm exceeds 300mm, add external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X460S
- ✓ 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 SI50X460S FAQ
Yes, the SI50X460S is discontinued. The direct replacement is the SAI50X460S. It is dimensionally interchangeable per ISO 15552, matching the 50mm bore, 460mm stroke, 982N force, G1/4 port, and mounting interface.
The 50mm bore uses a G1/4 port. Force output is 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical maximum of 200kgf at 1.0MPa. Operating speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X460S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X460S replacement — usually within 7-8 hours.