This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160X173, 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 SI160X173
The AirTAC SI160 Standard Cylinder SI160X173 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 173mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160X173, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke173 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160X173
- 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 SI160X173
The AirTAC SI160X173 is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 173 mm stroke. Delivering 10053 N push force at 0.5 MPa, it features a 40 mm carbon steel rod, M36x2 thread, and a G3/4 port. Because this legacy SI unit is end-of-life, you should order the direct replacement: the SAI160X173. It shares the identical ISO 15552 mounting interface, bore, stroke, output force, and porting for a seamless fixture swap.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements, ensuring low start-up pressure and extended life. Note this specific SKU lacks a magnet, so it cannot accept position sensors. For high-heat environments, a Viton H seal option raises the operating ceiling to 150 C.
Airtac SI160 Standard Cylinder SI160X173 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160X173 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160X173 |
| Bore size | Ø160 mm |
| Stroke | 173 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 SAI160X173 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 SAI160X173 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 SI160X173
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×173 | 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 SI160X173 Is Used
Heavy Stamping Press
Drives large platens and heavy dies using 10053 N of thrust at 0.5 MPa, relying on the 50 mm adjustable cushion to absorb impact.
Pallet Lowering Station
Manages vertical descent of 500+ kg loads, where the 160 mm bore provides the force needed to overcome return springs and friction.
Large Mold Clamping
Holds substantial injection or compression molds in place during setup, utilizing the rigid 40 mm piston rod and M36x2 threading.
Replacing the Airtac SI160 Standard Cylinder SI160X173 with the SAI160X173
To replace the discontinued SI160X173, order the SAI160X173. Verify your existing fixture matches the ISO 15552 mounting interface dimensions, and confirm the G3/4 port, 173 mm stroke, and 160 mm bore. Because this non-magnetic SKU cannot support switches, if you need position sensing you must select an SAI equivalent with the magnet option. When sizing, consider neighboring bores: the 125 mm bore yields 6136 N push at 0.5 MPa, while the 200 mm bore provides 15708 N. A plain cylinder will not hold a load on air loss—the cushion only decelerates near stroke end—so for suspended loads use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160X173
- ✓ 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 SI160X173 FAQ
Yes, the SI160X173 is discontinued. The direct replacement is the SAI160X173. It is dimensionally interchangeable per ISO 15552, maintaining the same 160 mm bore, 173 mm stroke, 10053 N force, G3/4 port, and mounting interface.
This double-acting cylinder uses a G3/4 air port. It generates 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 of 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160X173
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160X173 replacement — usually within 7-8 hours.