This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X403SN, 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 SI160X403SN
The AirTAC SI160 Standard Cylinder SI160X403SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 403mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X403SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke403 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X403SN
- 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 SI160X403SN
The AirTAC SI160X403SN is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 403 mm stroke. It delivers a thrust of 10053 N at 0.5 MPa. The direct replacement is the SAI160X403SN, matching the interface, force, G3/4 port, and stroke. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure.
This NBR-sealed unit (-N) operates from -20 to +70 C, with a Viton H option for high heat. The -S magnet works with CS1-B/DS1-B switches. The SAI family also adds SAIL and BSAI lock variants absent in the SI line.
Airtac SI160 Standard Cylinder SI160X403SN Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X403SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X403SN |
| Bore size | Ø160 mm |
| Stroke | 403 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 SAI160X403SN 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 SAI160X403SN 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 SI160X403SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×403 | 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 SI160X403SN Is Used
Heavy Press Operations
Drives large stamping and forming presses requiring up to 10053 N of thrust at 0.5 MPa, utilizing the 403 mm stroke to actuate heavy tooling.
Pallet Handling
Indexes loaded pallets on conveyors where the 512 kg vertical lift capacity and robust 160 mm bore handle substantial package weights safely.
Automated Assembly Lifts
Raises and lowers massive subassembly platforms, relying on the G3/4 air port and adjustable 50 mm cushions to decelerate moving masses smoothly.
Replacing the Airtac SI160 Standard Cylinder SI160X403SN with the SAI160X403SN
To replace the SI160X403SN, order the SAI160X403SN direct. Verify the ISO 15552 mounting interface, 403 mm stroke, G3/4 port, and M36x2 rod thread. Because the 403 mm stroke creates leveraged side-loads, use external guides to prevent rod bending. If sizing neighbors, the 125 mm bore yields 6136 N push at 0.5 MPa, while the 200 mm bore yields 15708 N. A plain cylinder drifts without live air; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. The -S magnet enables CS1-B/DS1-B sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X403SN
- ✓ 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 SI160X403SN FAQ
Yes, the SI160X403SN is discontinued. The direct replacement is the SAI160X403SN. It is a true ISO 15552 profile cylinder that matches the 160 mm bore, 403 mm stroke, G3/4 port, and mounting interface exactly, dropping into existing fixtures.
The G3/4 port feeds 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 push at 0.9 MPa, and a theoretical max of 2050 kgf at 1.0 MPa. The speed range is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X403SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X403SN replacement — usually within 7-8 hours.