This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X550SH, 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 SI160X550SH
The AirTAC SI160 Standard Cylinder SI160X550SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 550mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X550SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke550 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X550SH
- 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 SI160X550SH
The AirTAC SI160X550SH is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore, 550 mm stroke, and a high-temperature Viton H seal. Generating a push force of 10053 N at 0.5 MPa, it is superseded by the direct replacement SAI160X550SH. This replacement shares the exact same G3/4 port, M36x2 rod thread, and ISO 15552 mounting dimensions, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding, the SAI family introduces SAIL and BSAI lock variants absent in the SI line. The original -S magnet supports legacy CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160X550SH Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X550SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X550SH |
| Bore size | Ø160 mm |
| Stroke | 550 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 SAI160X550SH 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 SAI160X550SH 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 SI160X550SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×550 | 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 SI160X550SH Is Used
Heavy Stamping Press
Drives large platens in metal forming with 10053 N push force at 0.5 MPa, relying on the 50 mm adjustable cushions to absorb heavy end-of-stroke impacts.
High-Tamp Mold Handling
Shifts heavy injection molds in heated environments up to 150 C using the Viton H seal, while the 550 mm stroke provides extended reach.
Replacing the Airtac SI160 Standard Cylinder SI160X550SH with the SAI160X550SH
To replace the discontinued SI160X550SH, order the SAI160X550SH. Verify the ISO 15552 mounting interface, 160 mm bore, 550 mm stroke, G3/4 port, and high-temp Viton H seal. The -S magnet allows use of legacy CS1-B/DS1-B switches, though the SAI replacement family uses current AirTAC sensors. Sizing checks: the neighbouring 200 mm bore yields 15708 N push at 0.5 MPa, while the 125 mm bore yields 6136 N. A plain cylinder does not hold load without live air; the cushion only decelerates. For secure holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 550 mm stroke is long, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X550SH
- ✓ 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 SI160X550SH FAQ
Yes, the SI160X550SH is discontinued. The direct replacement is the SAI160X550SH. It is dimensionally interchangeable per ISO 15552, maintaining the same 160 mm bore, 550 mm stroke, force, G3/4 port, and mounting interface.
This double-acting cylinder delivers a push force of 10053 N and a pull of 9425 N at 0.5 MPa. At 0.7 MPa it pushes 14074 N, and 18095 N at 0.9 MPa. The theoretical max is 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s, and it uses a G3/4 air port.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X550SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X550SH replacement — usually within 7-8 hours.