This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X400S, 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 SI160X400S
The AirTAC SI160 Standard Cylinder SI160X400S 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 SAI160X400S, 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 → SAI160X400S
- 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 SI160X400S
The AirTAC SI160X400S is a discontinued double-acting ISO 15552 profile cylinder featuring a 160mm bore and 400mm stroke. It delivers 10053 N push force at 0.5 MPa through a G3/4 port. The direct replacement is the SAI160X400S, matching the exact ISO 15552 mounting interface, bore, stroke, output force, and port size for immediate fixture compatibility.
Upgrading to the SAI family brings an advanced piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI line also introduces SAIL and BSAI lock variants absent in the legacy series, and the -S suffix on this unit denotes a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160X400S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X400S |
| 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 SAI160X400S 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 SAI160X400S 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 SI160X400S
| 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 SI160X400S Is Used
Heavy Machinery Forming
Drives large press dies and heavy forming platens where the 10053 N push force at 0.5 MPa is required for high-tonnage metal deformation.
Bulk Material Diversion
Pivots heavy-duty diverter gates on aggregate or mining conveyors, utilizing the 400mm stroke to clear large material flows.
Replacing the Airtac SI160 Standard Cylinder SI160X400S with the SAI160X400S
To replace the discontinued SI160X400S, order the SAI160X400S, ensuring the ISO 15552 mounting interface, 160mm bore, 400mm stroke, G3/4 port, and mounting accessory match your existing fixture. If downsizing, neighboring bores offer 6136 N (125mm) or 15708 N (200mm) at 0.5 MPa. Because this is a 400mm stroke, external guides are recommended to prevent rod bending and manage side loads. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The -S magnet supports CS1-B/DS1-B switches, while the SAI uses current AirTAC switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X400S
- ✓ 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 SI160X400S FAQ
Yes, the SI160X400S is discontinued. The direct replacement is the SAI160X400S. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 160mm bore, 400mm stroke, output force, and G3/4 port to fit existing fixtures directly.
This double-acting cylinder features a G3/4 port and a 40mm piston rod. 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. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X400S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X400S replacement — usually within 7-8 hours.