This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X680S, 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 SI160X680S
The AirTAC SI160 Standard Cylinder SI160X680S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 680mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X680S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke680 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X680S
- 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 SI160X680S
The AirTAC SI160X680S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 680 mm stroke. It delivers 10053 N push force at 0.5 MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI160X680S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, force and port size.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent from the SI line, and the -S magnet on this unit supports legacy CS1-B/DS1-B switches.
Airtac SI160 Standard Cylinder SI160X680S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X680S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X680S |
| Bore size | Ø160 mm |
| Stroke | 680 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 SAI160X680S 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 SAI160X680S 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 SI160X680S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×680 | 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 SI160X680S Is Used
Heavy Stamping
Drives large presses and stamping dies requiring 10053 N push force at 0.5 MPa with stable 680 mm travel.
Automated Assembly
Actuates substantial industrial assembly fixtures where the G3/4 port and 160 mm bore deliver high volume airflow.
Replacing the Airtac SI160 Standard Cylinder SI160X680S with the SAI160X680S
To replace the SI160X680S, order the SAI160X680S. Confirm the ISO 15552 mounting interface, 160 mm bore, 680 mm stroke, G3/4 port (PT/G/NPT thread options) and mounting accessory. The -S magnet enables position sensing with CS1-B/DS1-B switches. For sizing both ways, neighbouring bores are 125 mm and 200 mm; at 0.5 MPa this 160 mm bore yields 10053 N push and 9425 N pull. Because the 680 mm stroke is long, use external guides to prevent rod bending and side-load damage. A plain cylinder does not hold load on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X680S
- ✓ 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 SI160X680S FAQ
Yes, the SI160X680S is discontinued. The direct replacement is the AirTAC SAI160X680S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 680 mm stroke, output force, G3/4 port and mounting interface.
The 160 mm bore provides 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. It features a 40 mm rod, M36x2 thread, and 50 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X680S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X680S replacement — usually within 7-8 hours.