This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X230S, 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 SI50X230S
The AirTAC Airtac SI50 Standard Cylinder SI50X230S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 230mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50X230S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke230 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50X230S
- 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 SI50X230S
The AirTAC SI50X230S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 230mm stroke, delivering a push force of 982 N at 0.5 MPa through its G1/4 port. As a legacy unit, it is directly replaced by the SAI50X230S. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting existing fixtures seamlessly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family introduces lock (SAIL) and clamp-lock (BSAI) variants absent in the SI line.
Airtac SI50 Standard Cylinder SI50X230S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X230S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X230S |
| Bore size | Ø50 mm |
| Stroke | 230 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 SAI50X230S 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 SAI50X230S 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 SI50X230S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×230 | 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 SI50X230S Is Used
Package Diversion
Actuates routing gates on packaging lines where the 982 N push force at 0.5 MPa easily handles carton diversion over the 230mm travel.
Vertical Lift Stops
Raises lightweight material stops in low-friction vertical lift stations, safely managing loads around the 50 kg vertical lift threshold.
Clamp Actuation
Drives mid-force clamping mechanisms in machining fixtures, utilizing the adjustable 30mm air cushions at both ends for smooth deceleration.
Replacing the Airtac SI50 Standard Cylinder SI50X230S with the SAI50X230S
To replace the SI50X230S, order the SAI50X230S, confirming the ISO 15552 mounting interface, 50mm bore, 230mm stroke, G1/4 port (PT/G/NPT thread), and mounting accessory. The -S magnet is present for CS1-B/DS1-B switches. Sizing both ways: a neighbouring 40mm bore yields 628 N push at 0.5 MPa, while a 63mm bore provides 1559 N. For a 230mm stroke, ensure adequate guide support to prevent rod-bending side loads. A plain cylinder does not hold load without live air; the cushion only decelerates. For load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X230S
- ✓ 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 SI50X230S FAQ
Yes, the AirTAC SI50X230S is discontinued. The direct replacement is the SAI50X230S. It shares the same ISO 15552 mounting interface, 50mm bore, 230mm stroke, output force, and G1/4 port, fitting directly into existing setups.
The 50mm bore features a G1/4 air port and an M16x1.5 rod thread. It delivers a push force of 982 N and a pull force of 825 N at 0.5 MPa, 1374 N push at 0.7 MPa, 1767 N push at 0.9 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X230S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X230S replacement — usually within 7-8 hours.