This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X550N, 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 SI160X550N
The AirTAC SI160 Standard Cylinder SI160X550N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 550mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X550N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke550 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X550N
- 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 SI160X550N
The AirTAC SI160X550N is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 550 mm stroke. It delivers 10053 N push force at 0.5 MPa using a G3/4 port. As an end-of-life unit, it is replaced by the SAI160X550N direct upgrade, which matches the original ISO 15552 mounting interface, bore, stroke, force, and port size exactly.
The SAI successor introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor. The NBR (-N) seal supports -20 to +70 C, though a Viton H option raises this to 150 C.
Airtac SI160 Standard Cylinder SI160X550N Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X550N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X550N |
| Bore size | Ø160 mm |
| Stroke | 550 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 SAI160X550N 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 SAI160X550N 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 SI160X550N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×550 | 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 SI160X550N Is Used
Heavy Machinery Forming
Drives large forming presses and heavy industrial machinery requiring up to 10053 N of thrust at 0.5 MPa operating pressure.
Large Mold Handling
Shifts heavy molds and tooling along a 550 mm stroke, relying on external guides to prevent rod bending during transit.
Replacing the Airtac SI160 Standard Cylinder SI160X550N with the SAI160X550N
To replace the SI160X550N, order the SAI160X550N. Verify the ISO 15552 mounting interface, 160 mm bore, 550 mm stroke, G3/4 port (PT/G/NPT thread), and your specific mounting accessory. Because this unit lacks the -S magnet, it cannot support position sensing; order an SAI160X550NS if switches are required. When sizing, neighbouring bores offer different forces: the 125 mm bore yields 6136 N push at 0.5 MPa, while the 200 mm bore yields 15708 N. A plain cylinder drifts on air loss because the 50 mm adjustable cushion only decelerates near stroke end; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 550 mm stroke, prevent rod bending by using an external guide to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X550N
- ✓ 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 SI160X550N FAQ
Yes, the SI160X550N is discontinued. The direct replacement is the AirTAC SAI160X550N. It shares the identical ISO 15552 mounting interface, 160 mm bore, 550 mm stroke, output force, and G3/4 port, fitting directly into existing fixtures.
The 160 mm bore uses a G3/4 port and features a 40 mm rod with an M36x2 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 SAI160X550N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X550N replacement — usually within 7-8 hours.