This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X430, 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 SI50X430
The AirTAC Airtac SI50 Standard Cylinder SI50X430 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 430mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X430, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke430 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X430
- 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 SI50X430
The AirTAC SI50X430 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 430mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50X430, which shares identical ISO 15552 mounting interface, bore, stroke, output force, and port size for seamless fixture integration.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this non-magnet SKU cannot accept a sensor; legacy CS1-B/DS1-B switches require an -S model. For high temps, Viton H seals raise the limit to 150 C.
Airtac SI50 Standard Cylinder SI50X430 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X430 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X430 |
| Bore size | Ø50 mm |
| Stroke | 430 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 SAI50X430 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 SAI50X430 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 SI50X430
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×430 | 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 SI50X430 Is Used
Package Diversion
Pushes medium-weight cartons off a main belt line utilizing the 982N push force at 0.5MPa, with the 430mm stroke clearing the conveyor lane.
Pallet Stopper Gate
Acts as a pneumatic stop for pallets entering a wrapping station, handling the 50kg vertical lift capacity safely with external guides.
Material Press
Provides consistent downward clamping force for light assembly presses, relying on adjustable air cushions to decelerate at stroke end.
Replacing the Airtac SI50 Standard Cylinder SI50X430 with the SAI50X430
To replace the SI50X430, order the SAI50X430. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 port thread (PT/G/NPT), and the M16x1.5 rod end. Because this is a 430mm stroke, use external guides to prevent rod bending and side-load wear. If sizing down, a 40mm bore yields 628N push at 0.5MPa; sizing up to 63mm provides 1559N. This non-magnet version cannot take a sensor—order an -S suffix if CS1-B/DS1-B sensing is needed. The air cushion only decelerates; for load holding on air loss, use an external pilot check valve, or specify the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X430
- ✓ 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 SI50X430 FAQ
Yes, the AirTAC SI50X430 is discontinued. The direct replacement is the SAI50X430. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 430mm stroke, 982N force, G1/4 port, and mounting interface.
This double-acting cylinder has a G1/4 air port and M16x1.5 rod thread. Force ratings are: 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical max of 200kgf at 1.0MPa.
Request a Quote for the SAI50X430
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X430 replacement — usually within 7-8 hours.