This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X400N, 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 SI160X400N
The AirTAC SI160 Standard Cylinder SI160X400N 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 SAI160X400N, 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 → SAI160X400N
- 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 SI160X400N
The AirTAC SI160X400N is a discontinued double-acting ISO 15552 profile cylinder with a 160mm bore and 400mm stroke. It delivers 10053 N push force at 0.5 MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI160X400N, a direct sharing the exact ISO 15552 mounting interface, M36x2 thread, and 50mm cushions.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This non-magnet SKU cannot take a sensor. The NBR seal handles -20 to +70 C; Viton H extends this to 150 C.
Airtac SI160 Standard Cylinder SI160X400N Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X400N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X400N |
| 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 SAI160X400N 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 SAI160X400N 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 SI160X400N
| 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 SI160X400N Is Used
Heavy Press Forming
Applies the 10053 N push at 0.5 MPa for stamping or forming heavy gauge materials within large tooling fixtures.
Large Mold Transfer
Shifts substantial injection molds or dies across a 400mm span, relying on external guides to absorb side loads.
Replacing the Airtac SI160 Standard Cylinder SI160X400N with the SAI160X400N
To replace the SI160X400N, order the SAI160X400N. Confirm the ISO 15552 mounting accessory (LB, FA, CA, TC), the G3/4 port, and the NBR seal. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors; choose an SAI-S if sensing is required. At 0.5 MPa it yields 10053 N push and 9425 N pull; if undersizing, a 125mm bore gives 6136 N, while a 200mm bore offers 15708 N. For the 400mm stroke, use external guides to prevent rod bending and side-load wear. The air cushion only decelerates; it does not hold load. For dead-load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X400N
- ✓ 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 SI160X400N FAQ
Yes, the SI160X400N is discontinued. The direct replacement is the SAI160X400N. It is dimensionally interchangeable per ISO 15552, retaining the same 160mm bore, 400mm stroke, G3/4 port, and mounting interface.
It uses a G3/4 port. At 0.5 MPa it provides 10053 N push and 9425 N pull. At 0.7 MPa push is 14074 N, and at 0.9 MPa it is 18095 N. The theoretical max force is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X400N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X400N replacement — usually within 7-8 hours.