This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX450, 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 SI160BX450
The AirTAC SI160 Standard Cylinder SI160BX450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 450mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke450 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX450
- 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 SI160BX450
The AirTAC SI160BX450 is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 450 mm stroke. Delivering 10053 N push force at 0.5 MPa through a G3/4 port, it is replaced by the SAI160BX450 direct cylinder. The SAI upgrade features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL, SAIF and BSAI variants the SI lacked.
This specific SKU uses a SUS304 stainless piston rod for corrosion resistance. Since it lacks a magnet, it cannot take a magnetic switch. Note that a plain cylinder drifts on air loss; use a pilot check valve or SAIL lock to hold loads.
Airtac SI160 Standard Cylinder SI160BX450 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX450 |
| Bore size | Ø160 mm |
| Stroke | 450 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 SAI160BX450 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 SAI160BX450 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 SI160BX450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×450 | 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 SI160BX450 Is Used
Heavy Press Systems
Drives 160 mm bore pressing operations where 10053 N of thrust at 0.5 MPa is required to form or seat large industrial components.
Large Mold Handling
Actuates 450 mm stroke movements to position heavy injection molds or tooling, relying on external guides to prevent rod bending.
Replacing the Airtac SI160 Standard Cylinder SI160BX450 with the SAI160BX450
To replace the SI160BX450, order the SAI160BX450. It is a direct per ISO 15552 mounting-interface dimensions, keeping the 160 mm bore, 450 mm stroke, 10053 N force, G3/4 port and mounting accessories. Confirm if you need the -B SUS304 stainless rod or the standard carbon steel rod. Because this SKU has no -S suffix, it cannot accept a magnetic sensor; if position feedback is needed, select a magnet-equipped SAI model and use current AirTAC switches. For sizing alternatives, the 125 mm bore offers less force, while the 200 mm bore provides 15708 N push at 0.5 MPa. With a 450 mm stroke, prevent rod bending by guiding the load externally to avoid side-load forces. The air cushion only decelerates the piston; it does not hold the load on air loss, so add an external rod lock or pilot check valve for safety.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX450
- ✓ 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 SI160BX450 FAQ
Yes, the AirTAC SI160BX450 is discontinued. The direct replacement is the SAI160BX450. It shares the same ISO 15552 mounting interface, 160 mm bore, 450 mm stroke, output force, G3/4 port and mounting accessories, fitting existing fixtures perfectly.
The 160 mm bore delivers 10053 N push and 9425 N pull at 0.5 MPa, 14074 N push at 0.7 MPa, and a theoretical max of 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s. It uses a G3/4 port and a 50 mm adjustable air cushion at both ends.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX450
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