This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX230, 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 SI50AX230
The AirTAC Airtac SI50 Standard Cylinder SI50AX230 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 SAI50AX230, 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 → SAI50AX230
- 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 SI50AX230
The AirTAC SI50AX230 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 230mm stroke. It delivers 982 N push and 825 N pull at 0.5 MPa through a G1/4 port. AirTAC replaced this legacy unit with the SAI50AX230, a direct replacement sharing the exact ISO 15552 mounting interface, M16x1.5 rod thread and 30mm cushions. Note that 230mm is a non-standard stroke length.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. For sensing, this specific SKU lacks a magnet and cannot accept CS1-B/DS1-B switches. The SAI family also adds SAIL, SAIF and BSAI lock variants absent from the SI line.
Airtac SI50 Standard Cylinder SI50AX230 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX230 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX230 |
| 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 SAI50AX230 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 SAI50AX230 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 SI50AX230
| 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 SI50AX230 Is Used
Mid-Range Diverter
Sorts standard packages on a belt line using 982 N of push force at 0.5 MPa, easily handling loads up to 589 N safely.
Clamp Actuator
Secures mild steel billets in machining fixtures, providing 825 N pull force while resisting corrosion via the SUS420J2 rod.
Replacing the Airtac SI50 Standard Cylinder SI50AX230 with the SAI50AX230
To replace the SI50AX230, order the SAI50AX230 and confirm the ISO 15552 interface, 50mm bore, 230mm stroke, G1/4 port (PT/G/NPT) and mounting accessory. Because this SKU has no -S magnet, it cannot support position sensing; add the magnet if switches are needed. Sizing both ways: a neighbouring 63mm bore offers 1559 N push at 0.5 MPa, while dropping to 40mm yields 628 N. At 230mm stroke, guide external rods to prevent side-loading and rod-bending. 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. The -A rod specifies SUS420J2 stainless steel over standard carbon steel.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX230
- ✓ 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 SI50AX230 FAQ
Yes, the SI50AX230 is discontinued. The direct replacement is the SAI50AX230. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 230mm stroke, G1/4 port and mounting interface, but features an upgraded two Y-shaped one-way piston seal for longer life.
This double-acting cylinder uses a G1/4 air port and delivers 982 N push / 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical maximum force of 200 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 30mm adjustable air cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX230
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX230 replacement — usually within 7-8 hours.