This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X50S, 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 SI160X50S
The AirTAC SI160 Standard Cylinder SI160X50S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 50mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X50S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke50 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X50S
- 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 SI160X50S
The AirTAC SI160X50S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 50 mm stroke. Delivering 10053 N push force at 0.5 MPa through a G3/4 port, it is replaced directly by the SAI160X50S. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, output force, port size and accessories.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also introduces SAIL, SAIF and BSAI variants absent from the SI line. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI160 Standard Cylinder SI160X50S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X50S |
| Bore size | Ø160 mm |
| Stroke | 50 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 SAI160X50S 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 SAI160X50S 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 SI160X50S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×50 | 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 SI160X50S Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 10053 N of push force at 0.5 MPa with robust 160 mm bore stability.
Industrial Clamp Rig
Secures large fabricated steel components during machining, utilizing the 18095 N push force available at 0.9 MPa.
Replacing the Airtac SI160 Standard Cylinder SI160X50S with the SAI160X50S
To replace the SI160X50S, order the SAI160X50S and confirm the ISO 15552 mounting interface, 160 mm bore, 50 mm stroke, G3/4 port (PT/G/NPT thread), M36x2 rod thread and the -S magnet for position sensing. If you need to size both ways, the neighboring 200 mm bore yields 15708 N push at 0.5 MPa, while the 125 mm bore yields 6136 N. A plain cylinder does not hold load on air loss; the 50 mm cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The SAI family also offers the SAIF valve variant for smaller bores.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X50S
- ✓ 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 SI160X50S FAQ
Yes, the SI160X50S is discontinued. The direct replacement is the SAI160X50S. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 160 mm bore, 50 mm stroke, output force, G3/4 port and mounting accessories.
The 160 mm bore cylinder features a G3/4 port, a 40 mm rod, and a 50 mm cushion. It delivers a push force of 10053 N and a pull force of 9425 N at 0.5 MPa. At 0.7 MPa the push force is 14074 N, and the theoretical maximum force is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X50S replacement — usually within 7-8 hours.