This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X400SFTC, 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 SI160X400SFTC
The AirTAC SI160 Standard Cylinder SI160X400SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 400mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X400SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X400SFTC
- 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 SI160X400SFTC
The AirTAC SI160X400SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 400 mm stroke, delivering 10053 N push force at 0.5 MPa. It features a G3/4 port, M36x2 rod thread, and 50 mm adjustable air cushions. AirTAC replaced this legacy unit with the SAI160X400SFTC, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and porting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL and BSAI lock variants absent in the SI line. Your -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI160 Standard Cylinder SI160X400SFTC Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X400SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X400SFTC |
| Bore size | Ø160 mm |
| Stroke | 400 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 SAI160X400SFTC 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 SAI160X400SFTC 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 SI160X400SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×400 | 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 SI160X400SFTC Is Used
Heavy Stamping Press
Drives large platens and heavy tooling where 10053 N push at 0.5 MPa is required for metal forming operations.
Pallet Handling Gate
Actuates robust 400 mm stroke automated warehouse gates, shifting heavy loaded pallets with reliable force.
Large Mold Ejection
Ejects substantial industrial molds from fixtures, utilizing the 50 mm adjustable cushions to decelerate heavy loads.
Replacing the Airtac SI160 Standard Cylinder SI160X400SFTC with the SAI160X400SFTC
To replace the SI160X400SFTC, order the SAI160X400SFTC. Verify the ISO 15552 FTC trunnion mount, 400 mm stroke, G3/4 port (PT/G/NPT thread), and -S magnet. Sizing both ways: a 200 mm bore offers more force, while a 125 mm bore provides 6136 N [email protected]. Note that 400 mm exceeds 300 mm, so use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Rod options include carbon steel, SUS420J2 (A), or SUS304 (B).
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X400SFTC
- ✓ 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 SI160X400SFTC FAQ
Yes, the SI160X400SFTC is discontinued. The direct replacement is the SAI160X400SFTC. It shares the identical ISO 15552 mounting interface, 160 mm bore, 400 mm stroke, output force, and G3/4 port, fitting existing fixtures perfectly.
The 160 mm bore features a G3/4 port. Force ratings are: 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 max of 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X400SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X400SFTC replacement — usually within 7-8 hours.