This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X1680S, 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 SI160X1680S
The AirTAC SI160 Standard Cylinder SI160X1680S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 1680mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X1680S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke1680 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X1680S
- 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 SI160X1680S
The AirTAC SI160X1680S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 1680 mm stroke. Generating 10053 N push force at 0.5 MPa, it is replaced by the direct replacement SAI160X1680S. This successor shares the exact ISO 15552 mounting interface, bore, stroke, G3/4 port, and output force. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because 1680 mm exceeds the 1500 mm standard stroke maximum, this is a non-standard made-to-order unit.
The SAI family introduces variants the SI lacked, such as the SAIL air-released lock and BSAI clamp-lock. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors; the SAI replacement uses current AirTAC switches. A plain cylinder drifts without live air, so use a lock variant or pilot check valve for load holding.
Airtac SI160 Standard Cylinder SI160X1680S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X1680S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X1680S |
| Bore size | Ø160 mm |
| Stroke | 1680 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 SAI160X1680S 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 SAI160X1680S 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 SI160X1680S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×1680 | 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 SI160X1680S Is Used
Heavy Material Lifts
Drives large vertical lifting platforms or heavy industrial doors, utilizing the 10053 N push force at 0.5 MPa for substantial load handling.
Large Press Actuation
Actuates heavy-duty presses and stamping fixtures where a 160 mm bore and extended 1680 mm reach are required to cycle large tooling.
Automated Assembly Transfer
Shifts heavy pallets or automotive subassemblies across long-stroke transfer lines, relying on the 30-500 mm/s speed range for controlled movement.
Replacing the Airtac SI160 Standard Cylinder SI160X1680S with the SAI160X1680S
To replace the SI160X1680S, order the SAI160X1680S. Confirm the ISO 15552 mounting interface, 160 mm bore, 1680 mm non-standard stroke, G3/4 port, and mounting accessory. The -S magnet is present for position sensing. For sizing, the 125 mm bore yields 6136 N push at 0.5 MPa, while the 200 mm bore yields 15708 N. If you need to hold a load vertically, note that a plain cylinder drifts without live air and the cushion only decelerates; use the SAIL lock, BSAI clamp-lock, or an external pilot check valve. Because the 1680 mm stroke exceeds the 1500 mm standard maximum and is highly extended, you must use an external guide to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X1680S
- ✓ 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 SI160X1680S FAQ
Yes, the SI160X1680S is discontinued. The direct replacement is the SAI160X1680S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 1680 mm stroke, output force, G3/4 port, and mounting interface.
This double-acting cylinder has a G3/4 port. It delivers 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 maximum force of 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X1680S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X1680S replacement — usually within 7-8 hours.