This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50AX110, 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 SI50AX110
The AirTAC SI50 Standard Cylinder SI50AX110 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 SAI50AX110, 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 → SAI50AX110
- 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 SI50AX110
The AirTAC SI50AX110 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 110mm stroke. It delivers 982N push force at 0.5MPa via a G1/4 port. The direct replacement is the SAI50AX110, matching the exact bore, stroke, force, port and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet (-S) and cannot take a sensor, though legacy SI sensors were CS1-B/DS1-B. The -A suffix denotes a SUS420J2 stainless rod.
Airtac SI50 Standard Cylinder SI50AX110 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50AX110 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50AX110 |
| 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 SAI50AX110 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 SAI50AX110 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 SI50AX110
| 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 SI50AX110 Is Used
Package Diversion
Ideal for pushing 50kg cartons at 110mm stroke onto adjacent conveyor lines using the 982N thrust at 0.5MPa.
Clamping Fixtures
Holds workpieces securely during machining with the SUS420J2 stainless rod resisting coolant corrosion.
Pallet Stops
Acts as a reliable 110mm stopper mechanism in roller conveyors, handling pallets safely within its 589N load limit.
Replacing the Airtac SI50 Standard Cylinder SI50AX110 with the SAI50AX110
To replace the SI50AX110, order the SAI50AX110 and confirm the ISO 15552 mounting interface, 50mm bore, 110mm stroke, G1/4 port (PT/G/NPT) and mounting accessory. This no-magnet SKU cannot accept a sensor. For sizing, the 50mm bore yields 982N push at 0.5MPa; dropping to 40mm gives 628N, while 63mm provides 1559N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50AX110
- ✓ 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 SI50AX110 FAQ
Yes, the SI50AX110 is discontinued. The direct replacement is the SAI50AX110. It is dimensionally interchangeable per ISO 15552, keeping the same 50mm bore, 110mm stroke, 982N force, G1/4 port and mounting interface.
This double-acting cylinder has a G1/4 port. It generates 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, and a theoretical max of 200kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50AX110
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50AX110 replacement — usually within 7-8 hours.