This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X320H, 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 SI160X320H
The AirTAC SI160 Standard Cylinder SI160X320H 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 SAI160X320H, 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 → SAI160X320H
- 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 SI160X320H
The AirTAC SI160X320H is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore, 320 mm stroke, and a high-temperature Viton H seal (0 to 150 C). It delivers 10053 N push force at 0.5 MPa via a G3/4 port. Because this SI unit is end-of-life, you should order the direct replacement SAI160X320H, which shares the exact ISO 15552 mounting interface, M36x2 rod thread, and 50 mm cushions.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note that this specific SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors. For load-holding needs the plain SI cannot lock on air loss, but the SAIL or BSAI variants can.
Airtac SI160 Standard Cylinder SI160X320H Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X320H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X320H |
| 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 SAI160X320H 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 SAI160X320H 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 SI160X320H
| 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 SI160X320H Is Used
Heavy Stamp Pressing
Drives large heavy-duty stamping dies requiring high force, using the 14074 N push at 0.7 MPa to form thick steel plates in hot environments up to 150 C.
High-Force Clamping
Secures massive fabricated weldments during machining operations, providing stable 10053 N holding force at 0.5 MPa without shifting under vibration.
Pallet Diversion
Actuates heavy structural diverters on high-capacity material handling lines, moving loaded pallets with a 512 kg vertical lift margin safely.
Replacing the Airtac SI160 Standard Cylinder SI160X320H with the SAI160X320H
To replace the discontinued SI160X320H, order the SAI160X320H. Confirm the ISO 15552 mounting interface, the 320 mm stroke, G3/4 port, and your Viton H high-temperature seal requirement. When sizing, note the 160 mm bore yields 10053 N push at 0.5 MPa; if you need less force, step down to the 125 mm bore (6136 N push), or step up to 200 mm (15708 N push). Because the 320 mm stroke is long, use external guides to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding specify an external pilot check valve, or choose the SAIL air-released lock or BSAI clamp-lock variant. Since this SKU has no -S magnet, it cannot support position sensing.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X320H
- ✓ 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 SI160X320H FAQ
Yes, the SI160X320H is discontinued. The direct replacement is the SAI160X320H. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 320 mm stroke, G3/4 port, and mounting interface, but adds an upgraded piston seal.
The 160 mm bore produces 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, with a 50 mm adjustable cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X320H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X320H replacement — usually within 7-8 hours.