This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX325S, 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 SI160AX325S
The AirTAC SI160 Standard Cylinder SI160AX325S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 325mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160AX325S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke325 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160AX325S
- 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 SI160AX325S
The AirTAC SI160AX325S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 325 mm stroke. Delivering 10053 N push force at 0.5 MPa, it features a SUS420J2 stainless steel rod, a G3/4 air port, and a built-in magnet for legacy CS1-B/DS1-B sensors. AirTAC replaced this EOL unit with the SAI160AX325S.
The SAI160AX325S is a direct replacement, matching the exact ISO 15552 mounting interface, bore, stroke, and force. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI160 Standard Cylinder SI160AX325S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX325S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX325S |
| Bore size | Ø160 mm |
| Stroke | 325 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 SAI160AX325S 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 SAI160AX325S 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 SI160AX325S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×325 | 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 SI160AX325S Is Used
Heavy Press Systems
Drives 10-ton class press operations where the 10053 N push force at 0.5 MPa securely forms or stamps metal components.
Pallet Lifting Stations
Lifts loaded pallets up to the 512 kg vertical limit, requiring external guides to manage side-load across the 325 mm stroke.
Industrial Clamp Jigs
Holds large fabricated steel frames in welding jigs, utilizing the SUS420J2 stainless rod for corrosion resistance.
Replacing the Airtac SI160 Standard Cylinder SI160AX325S with the SAI160AX325S
To replace the SI160AX325S, order the SAI160AX325S and confirm the ISO 15552 mounting fixture, 325 mm stroke, and G3/4 port match. The -S magnet enables current AirTAC switches (replacing legacy CS1-B/DS1-B), and the -A rod specifies SUS420J2 stainless steel. If you need to size both ways, neighboring bores (125 mm or 200 mm) alter the 10053 N @0.5 MPa force class significantly. Because this is a 325 mm stroke, use external guides to prevent rod-bending and side-load damage. A plain cylinder does not hold load on air loss; the cushion only decelerates. For load holding, use an external pilot check valve, or specify the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX325S
- ✓ 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 SI160AX325S FAQ
Yes, the SI160AX325S is discontinued. The direct replacement is the SAI160AX325S. It shares the identical ISO 15552 mounting interface, 160 mm bore, 325 mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly while upgrading the piston seal.
It uses a G3/4 air port. The force ratings are: 10053 N push and 9425 N pull at 0.5 MPa, 14074 N push at 0.7 MPa, 18095 N push at 0.9 MPa, and a theoretical maximum of 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160AX325S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX325S replacement — usually within 7-8 hours.