This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X520S, 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 SI160X520S
The AirTAC SI160 Standard Cylinder SI160X520S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 520mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X520S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke520 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X520S
- 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 SI160X520S
The AirTAC SI160X520S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 520 mm stroke. It delivers a push force of 10053 N at 0.5 MPa via a G3/4 port. The direct replacement is the SAI160X520S, matching the interface, bore, stroke, force and mounting.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family also adds SAIL and BSAI lock variants the SI lacked. This -S model has a piston magnet for CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160X520S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X520S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X520S |
| Bore size | Ø160 mm |
| Stroke | 520 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 SAI160X520S 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 SAI160X520S 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 SI160X520S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×520 | 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 SI160X520S Is Used
Heavy Pressing
Drives large stamping or forming presses requiring up to 14074 N of thrust at 0.7 MPa.
Automated Clamping
Secures large fabricated components during machining or welding with robust 160 mm bore force.
Replacing the Airtac SI160 Standard Cylinder SI160X520S with the SAI160X520S
To replace this SI cylinder, order the SAI160X520S. It is dimensionally interchangeable per the ISO 15552 mounting interface, keeping the 160 mm bore, 520 mm stroke, M36x2 rod thread and G3/4 port. Confirm your mounting accessory (LB, FA, CA, TC) and thread option (PT, G, NPT). Because the stroke is 520 mm, use an external guide to prevent rod bending and side-load wear. For sizing, the neighbouring 200 mm bore offers higher force, while dropping to 125 mm reduces push force to 6136 N at 0.5 MPa. A plain cylinder drifts on air loss; for load holding, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X520S
- ✓ 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 SI160X520S FAQ
Yes, the SI160X520S is discontinued. The direct replacement is the SAI160X520S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 520 mm stroke, output force, G3/4 port and mounting fixtures.
At 0.5 MPa it pushes 10053 N and pulls 9425 N. At 0.7 MPa push is 14074 N, and at 0.9 MPa it is 18095 N. The theoretical max force is 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X520S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X520S replacement — usually within 7-8 hours.