This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X320SFB, 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 SI160X320SFB
The AirTAC Airtac SI160 Standard Cylinder SI160X320SFB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 320mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X320SFB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke320 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X320SFB
- 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 SI160X320SFB
The AirTAC SI160X320SFB is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 320 mm stroke. It delivers 10053 N push force at 0.5 MPa and uses a G3/4 port with an M36x2 rod thread. AirTAC replaced this legacy unit with the SAI160X320SFB, a direct upgrade retaining the exact ISO 15552 mounting interface, FB flange, and 50 mm adjustable cushions.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding, the SAI family introduces SAIL and BSAI lock variants absent in the SI line. The original -S magnet supports CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160X320SFB Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X320SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X320SFB |
| Bore size | Ø160 mm |
| Stroke | 320 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 SAI160X320SFB 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 SAI160X320SFB 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 SI160X320SFB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×320 | 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 SI160X320SFB Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 10053 N of push force at 0.5 MPa with robust FB flange mounting.
Large Mold Clamping
Secures substantial injection molds using the 50 mm adjustable air cushions to decelerate heavy loads at stroke ends.
Replacing the Airtac SI160 Standard Cylinder SI160X320SFB with the SAI160X320SFB
To replace the SI160X320SFB, order the SAI160X320SFB. Confirm the ISO 15552 interface, 160 mm bore, 320 mm stroke, G3/4 port, and FB flange mounting. The -S magnet equates to legacy CS1-B/DS1-B switches; the SAI uses current AirTAC sensors. Sizing both ways: a 200 mm bore offers more thrust, while a 125 mm bore provides 6136 N push at 0.5 MPa. Note that plain cylinders drift without live air; use an external rod lock or pilot check valve for holding. Because 320 mm exceeds 300 mm, use external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X320SFB
- ✓ 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 SI160X320SFB FAQ
Yes, the SI160X320SFB is discontinued. The direct replacement is the SAI160X320SFB. It shares the same ISO 15552 mounting interface, 160 mm bore, 320 mm stroke, FB flange, and G3/4 port, fitting existing fixtures directly.
The G3/4 port pairs with a 40 mm rod. It generates 10053 N push and 9425 N pull at 0.5 MPa, 14074 N push at 0.7 MPa, 18095 N at 0.9 MPa, and a theoretical max of 2050 kgf at 1.0 MPa. Speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X320SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X320SFB replacement — usually within 7-8 hours.