This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X830S, 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 SI50X830S
The AirTAC Airtac SI50 Standard Cylinder SI50X830S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 830mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X830S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke830 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X830S
- 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 SI50X830S
The AirTAC SI50X830S is a discontinued double-acting ISO 15552 profile cylinder with an extruded aluminum barrel and adjustable air cushions at both ends. Delivering 982 N push force at 0.5 MPa through a G1/4 port, this 50 mm bore, 830 mm stroke unit is replaced by the SAI50X830S.
The SAI direct maintains identical ISO 15552 mounting dimensions, bore, stroke, and force, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Because of the 830 mm stroke, external guides are recommended to prevent rod bending under side loads. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI50 Standard Cylinder SI50X830S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X830S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X830S |
| Bore size | Ø50 mm |
| Stroke | 830 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 SAI50X830S 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 SAI50X830S 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 SI50X830S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×830 | 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 SI50X830S Is Used
Long-Stroke Diversion
Pushes packages across a transfer line with its 830 mm reach, providing 982 N of thrust at 0.5 MPa to clear jammed items.
Extended Press Ejection
Ejects formed parts from deep press beds, utilizing the 30 mm adjustable air cushions at both ends to decelerate smoothly.
Replacing the Airtac SI50 Standard Cylinder SI50X830S with the SAI50X830S
To replace the SI50X830S, order the SAI50X830S. Confirm the ISO 15552 mounting interface, the G1/4 port, the M16x1.5 rod thread, and your mounting accessory (LB, FA, TC, etc.). The -S suffix ensures a piston magnet is present for switch sensing; if you need a new sensor, the SAI family uses current AirTAC switches rather than the legacy CS1-B/DS1-B. If sizing up or down, neighboring bores are 40 mm and 63 mm. At 0.5 MPa, this 50 mm bore yields 982 N push and 825 N pull. Note that a plain cylinder does not hold load without live air—the cushion only decelerates. For holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant. Finally, at 830 mm, this long stroke demands external guides to manage side loads and prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X830S
- ✓ 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 SI50X830S FAQ
Yes, the SI50X830S is discontinued. The direct replacement is the SAI50X830S. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 830 mm stroke, output force, G1/4 port, and mounting interface. The SAI simply features an upgraded piston seal for longer life.
This double-acting cylinder features a G1/4 air port. At 0.5 MPa it provides 982 N push and 825 N pull force. At 0.7 MPa push is 1374 N, and at 0.9 MPa it is 1767 N. The theoretical maximum force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X830S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X830S replacement — usually within 7-8 hours.