This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X680, 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 SI160X680
The AirTAC Airtac SI160 Standard Cylinder SI160X680 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 SAI160X680, 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 → SAI160X680
- 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 SI160X680
The AirTAC SI160X680 is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 680 mm stroke. It delivers 10053 N push and 9425 N pull at 0.5 MPa through a G3/4 port. AirTAC replaced this legacy unit with the SAI160X680, a direct replacement matching the exact ISO 15552 mounting interface, M36x2 rod thread, and 50 mm cushions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors. The SAI family also adds SAIL and BSAI lock variants absent in the SI line.
Airtac SI160 Standard Cylinder SI160X680 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X680 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X680 |
| 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 SAI160X680 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 SAI160X680 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 SI160X680
| 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 SI160X680 Is Used
Heavy Stamp Press Feed
Drives large material billets into a hydraulic press, utilizing the 10053 N push force to overcome initial mechanical friction.
Pallet Lift Ejection
Ejects loaded pallets from a vertical lift station, safely moving masses near the 512 kg calculated vertical lift capacity.
Large Mold Actuation
Shifts heavy injection mold cores over the 680 mm travel distance, requiring external guide rails to prevent rod deflection.
Replacing the Airtac SI160 Standard Cylinder SI160X680 with the SAI160X680
To replace the SI160X680, order the SAI160X680 and verify your ISO 15552 mounting accessory (LB, FA, CA, TC), G3/4 port, and M36x2 thread. Since this SKU lacks the -S magnet, it cannot take a sensor; order the -S suffix if position detection is needed. Operating speed is 30-500 mm/s. For sizing down, a 125 mm bore yields 6136 N push at 0.5 MPa; sizing up to 200 mm provides 15708 N. With a 680 mm stroke, use external guides to prevent rod bending and side-load damage. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify the SAIL lock variant, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X680
- ✓ 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 SI160X680 FAQ
Yes, the AirTAC SI160X680 is discontinued. The direct replacement is the SAI160X680. It shares the same ISO 15552 mounting interface, 160 mm bore, 680 mm stroke, output force, G3/4 port, and 50 mm adjustable air cushions, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/4 air 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 maximum force is 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X680
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X680 replacement — usually within 7-8 hours.