This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X400STC, 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 SI160X400STC
The AirTAC SI160 Standard Cylinder SI160X400STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 400mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X400STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke400 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X400STC
- 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 SI160X400STC
The AirTAC SI160X400STC is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 400 mm stroke. It delivers 10053 N push force at 0.5 MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI160X400STC, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL and BSAI lock variants absent from the SI line. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI160 Standard Cylinder SI160X400STC Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X400STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X400STC |
| Bore size | Ø160 mm |
| Stroke | 400 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 SAI160X400STC 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 SAI160X400STC 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 SI160X400STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×400 | 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 SI160X400STC Is Used
Heavy Machinery Forming
Drives large forming presses and heavy-duty industrial machinery requiring up to 18095 N of thrust at 0.7 MPa, utilizing the robust 40 mm piston rod and M36x2 threading.
Large Fixture Actuation
Actuates massive welding and assembly fixtures using the ISO 15552 TC trunnion interface, ensuring precise 400 mm travel with adjustable 50 mm air cushions at both ends.
Replacing the Airtac SI160 Standard Cylinder SI160X400STC with the SAI160X400STC
To replace the SI160X400STC, order the SAI160X400STC. Verify the TC trunnion mount, G3/4 port, M36x2 rod thread, and the -S magnet for position sensing. The 400 mm stroke is well within the 1500 mm standard limit, but at this length you must account for side-load and rod-bending risks by using an external guide to prevent premature wear. If sizing downward, a 125 mm bore yields 6136 N push at 0.5 MPa; sizing upward to 200 mm provides 15708 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end. For load holding, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X400STC
- ✓ 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 SI160X400STC FAQ
Yes, the SI160X400STC is discontinued. The direct replacement is the SAI160X400STC. It shares the identical ISO 15552 mounting interface, 160 mm bore, 400 mm stroke, output force, and G3/4 port, fitting seamlessly into existing TC trunnion fixtures.
This double-acting cylinder features a G3/4 air port and an M36x2 rod thread. 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 SAI160X400STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X400STC replacement — usually within 7-8 hours.