This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX350S, 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 SI160 Standard Cylinder SI160AX350S
The AirTAC SI160 Standard Cylinder SI160AX350S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 350mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160AX350S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke350 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160AX350S
- 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 SI160 Standard Cylinder SI160AX350S
The AirTAC SI160AX350S is a discontinued double-acting ISO 15552 profile cylinder featuring a 160mm bore, 350mm stroke, and a SUS420J2 stainless steel piston rod. It delivers 10053 N of push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI160AX350S, a direct replacement retaining the exact ISO 15552 mounting interface, G3/4 port, and 2050 kgf maximum force.
The SAI upgrade introduces an advanced piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original SI-S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family utilizes current AirTAC switches.
Airtac SI160 Standard Cylinder SI160AX350S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX350S |
| Bore size | Ø160 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | G3/4 |
| Rod thread | M36×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 50 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI160AX350S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø160mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 10053 N | 9425 N |
| 0.7 MPa | 14074 N | — |
| Max (@1.0 MPa) | 2050 kgf | |
The SAI160AX350S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI160 Standard Cylinder SI160AX350S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×350 | 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 SI160 Standard Cylinder SI160AX350S Is Used
Heavy Machinery Forming
Drives large presses and forming fixtures where the 18095 N output at 0.9 MPa is required to actuate heavy tooling over the 350mm travel.
Stainless Rod Tooling
Ideal for environments requiring the SUS420J2 corrosion-resistant rod option, providing reliable actuation in humid or mildly chemically exposed assembly lines.
Replacing the Airtac SI160 Standard Cylinder SI160AX350S with the SAI160AX350S
To replace the SI160AX350S, order the SAI160AX350S and verify your ISO 15552 mounting fixtures, M36x2 rod thread, G3/4 air port, and the -S magnet for position sensing. If sizing alternatives, adjacent bores (125mm or 200mm) alter the footprint, while operating at 0.7 MPa yields 14074 N of push force. Because this is a 350mm stroke, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding. The SAI family also adds the SAIF self-valve option, though only for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX350S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI160 Standard Cylinder SI160AX350S FAQ
Yes, the SI160AX350S is discontinued. The direct replacement is the SAI160AX350S. It shares the identical ISO 15552 mounting interface, 160mm bore, 350mm stroke, force output, and G3/4 port, fitting directly into existing machinery.
It features a G3/4 air port and provides 10053 N push / 9425 N pull at 0.5 MPa, 14074 N push at 0.7 MPa, and a theoretical maximum of 2050 kgf at 1.0 MPa. The unit operates at 30-500 mm/s with a 50mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160AX350S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX350S replacement — usually within 7-8 hours.