This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX325, 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 SI160AX325
The AirTAC SI160 Standard Cylinder SI160AX325 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 SAI160AX325, 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 → SAI160AX325
- 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 SI160AX325
The AirTAC SI160AX325 is a discontinued double-acting ISO 15552 profile cylinder with a 160mm bore and 325mm stroke. It delivers 10053 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI160AX325, matching the exact ISO 15552 mounting interface, stroke, force, and accessories.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU uses an SUS420J2 stainless steel rod (the -A option) and lacks a magnet, so it cannot accept a CS1-B or DS1-B sensor.
Airtac SI160 Standard Cylinder SI160AX325 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX325 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX325 |
| 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 SAI160AX325 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 SAI160AX325 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 SI160AX325
| 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 SI160AX325 Is Used
Heavy Machinery Forming
Drives large presses and forming fixtures requiring substantial thrust, leveraging the 10053 N push force at 0.5 MPa to move heavy steel components.
Automated Clamp Systems
Secures oversized workpieces in CNC machining cells, utilizing the 325mm stroke to accommodate wide material spans.
Replacing the Airtac SI160 Standard Cylinder SI160AX325 with the SAI160AX325
To replace the SI160AX325, order the SAI160AX325. Confirm the ISO 15552 mounting interface, the 325mm stroke, G3/4 port, and your specific mounting accessory. The -A rod denotes SUS420J2 stainless steel; since this SKU lacks an -S magnet, it cannot support position sensing. If you need to step up or down, neighbor bores are 125mm and 200mm. At 0.5 MPa this 160mm bore yields 10053 N push and 9425 N pull force. Because the 325mm stroke is long, use external guides to prevent rod-bending side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX325
- ✓ 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 SI160AX325 FAQ
Yes, the SI160AX325 is discontinued. The direct replacement is the SAI160AX325. It is dimensionally interchangeable per ISO 15552, retaining the same 160mm bore, 325mm stroke, output force, G3/4 port, and mounting interface.
This double-acting cylinder features a G3/4 port and an M36x2 rod thread. Force output is 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 SAI160AX325
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX325 replacement — usually within 7-8 hours.