This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX125S, 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 SI160AX125S
The AirTAC SI160 Standard Cylinder SI160AX125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 125mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160AX125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke125 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160AX125S
- 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 SI160AX125S
The AirTAC SI160AX125S is a discontinued double-acting ISO 15552 profile cylinder featuring a 160mm bore and 125mm stroke. Built with a SUS420J2 stainless steel piston rod, it delivers 10053 N push force at 0.5 MPa and uses a G3/4 air port. The direct replacement is the SAI160AX125S, matching the bore, stroke, force, port, and ISO 15552 mounting interface for seamless fixture integration.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line. This -S model includes a piston magnet for CS1-B/DS1-B sensors, though the SAI replacement uses current AirTAC switches.
Airtac SI160 Standard Cylinder SI160AX125S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX125S |
| Bore size | Ø160 mm |
| Stroke | 125 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 SAI160AX125S 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 SAI160AX125S 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 SI160AX125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×125 | 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 SI160AX125S Is Used
Heavy Stamping Press
Drives large dies and heavy platens in metal forming, using its 10053 N push force at 0.5 MPa to shape thick steel blanks reliably.
Injection Molding Clamp
Secures large molds and heavy tooling fixtures during manufacturing cycles, relying on the robust 40mm SUS420J2 stainless rod.
Replacing the Airtac SI160 Standard Cylinder SI160AX125S with the SAI160AX125S
To replace the SI160AX125S, order the SAI160AX125S. Confirm the ISO 15552 mounting interface, 125mm stroke, G3/4 port, and your specific mounting accessory (LB, FA, CA, TC, etc.). The -S magnet and -A SUS420J2 rod are retained. If you need to size up or down, neighbouring bores are 125mm and 200mm; at 0.5 MPa, this 160mm bore yields 10053 N push and 9425 N pull. A plain cylinder does not hold load on air loss—the cushion only decelerates—so for suspended loads use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. For strokes over 300mm, guide external rods to prevent side-load bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX125S
- ✓ 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 SI160AX125S FAQ
Yes, the SI160AX125S is discontinued. The direct replacement is the SAI160AX125S. It is dimensionally interchangeable per ISO 15552, retaining the same 160mm bore, 125mm stroke, G3/4 port, and mounting interface to fit existing fixtures directly.
This double-acting cylinder uses a G3/4 air port. 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. It operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160AX125S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX125S replacement — usually within 7-8 hours.