This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X50SFB, 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 SI160X50SFB
The AirTAC SI160 Standard Cylinder SI160X50SFB 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 SAI160X50SFB, 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 → SAI160X50SFB
- 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 SI160X50SFB
The AirTAC SI160X50SFB is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel. It delivers a robust 10053 N push force at 0.5 MPa through its 160 mm bore and G3/4 port. AirTAC replaced this legacy unit with the SAI160X50SFB, a direct upgrade retaining the exact FB flange mounting, M36x2 rod thread, and 50 mm stroke.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and extended life. You can also specify Viton H seals for high-temperature environments up to 150 C.
Airtac SI160 Standard Cylinder SI160X50SFB Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X50SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X50SFB |
| 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 SAI160X50SFB 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 SAI160X50SFB 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 SI160X50SFB
| 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 SI160X50SFB Is Used
Heavy Press Forming
Drives large stamping and forming presses requiring substantial thrust, utilizing the 18095 N output at 0.9 MPa to shape thick metal components.
Pallet Lift Stations
Actuates heavy-duty pallet lifting and positioning platforms where the 512 kg vertical lift capacity handles loaded containers securely.
Mold Clamping Systems
Secures large injection molds via the FB flange mount, providing the rigid holding and high force needed for industrial molding machinery.
Replacing the Airtac SI160 Standard Cylinder SI160X50SFB with the SAI160X50SFB
To replace the SI160X50SFB, order the SAI160X50SFB. It is dimensionally interchangeable per the ISO 15552 mounting interface, matching the 160 mm bore, 50 mm stroke, G3/4 port, and FB flange. If you need to size both ways, a neighboring 200 mm bore offers higher force, while dropping to 125 mm reduces the footprint. A plain cylinder drifts on air loss since the cushion only decelerates; for load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X50SFB
- ✓ 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 SI160X50SFB FAQ
Yes, the SI160X50SFB is discontinued. The direct replacement is the SAI160X50SFB. It shares the same ISO 15552 mounting interface, 160 mm bore, 50 mm stroke, output force, and G3/4 port, fitting directly into existing FB flange fixtures.
This double-acting cylinder features a G3/4 port and delivers a push force of 10053 N and pull of 9425 N at 0.5 MPa. At 0.7 MPa it pushes 14074 N, and 18095 N at 0.9 MPa. The theoretical maximum force is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X50SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X50SFB replacement — usually within 7-8 hours.