This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX110S, 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 SI50AX110S
The AirTAC Airtac SI50 Standard Cylinder SI50AX110S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 110mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50AX110S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke110 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50AX110S
- 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 SI50AX110S
The AirTAC SI50AX110S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 110mm stroke. It features a SUS420J2 stainless piston rod and a built-in magnet for legacy CS1-B/DS1-B sensors. Delivering 982N push force at 0.5MPa via a G1/4 port, its direct replacement is the SAI50AX110S.
The SAI50AX110S shares the exact ISO 15552 mounting interface, bore, stroke, and force. It upgrades the piston seal to two Y-shaped one-way elements for low start-up pressure. The SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI50 Standard Cylinder SI50AX110S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX110S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX110S |
| Bore size | Ø50 mm |
| Stroke | 110 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 SAI50AX110S 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 SAI50AX110S 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 SI50AX110S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×110 | 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 SI50AX110S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for mid-force clamping and positioning in environments where standard carbon steel rods face corrosion risks.
Line Diversion
Provides reliable 110mm stroke push-offs at packaging stations, utilizing the 982N thrust class to redirect products efficiently.
Replacing the Airtac SI50 Standard Cylinder SI50AX110S with the SAI50AX110S
To replace the SI50AX110S, order the SAI50AX110S. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/4 port, and the -S magnet for current AirTAC switches. The SUS420J2 rod is retained. Sizing both ways: the 50mm bore yields 982N push at 0.5MPa, while a 63mm bore offers 1559N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX110S
- ✓ 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 SI50AX110S FAQ
Yes, the SI50AX110S is discontinued. The direct replacement is the SAI50AX110S. It shares the same ISO 15552 mounting interface, 50mm bore, 110mm stroke, force, G1/4 port, and magnet, fitting existing fixtures directly.
The G1/4 port feeds a 50mm bore yielding 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200kgf at 1.0MPa. The rod is 20mm with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX110S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX110S replacement — usually within 7-8 hours.