This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX425, 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 SI160BX425
The AirTAC Airtac SI160 Standard Cylinder SI160BX425 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 425mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX425, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke425 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX425
- 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 SI160BX425
The AirTAC SI160BX425 is a discontinued double-acting ISO 15552 profile cylinder featuring a 160 mm bore and 425 mm stroke. Built with an extruded aluminum barrel, it delivers 10053 N push force at 0.5 MPa and uses a G3/4 air port. The direct replacement is the SAI160BX425, matching the exact ISO 15552 mounting interface, bore, stroke, force, port and accessories.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific SKU includes a SUS304 stainless steel rod (B option) for corrosion resistance, but lacks a magnet, meaning it cannot accept CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160BX425 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX425 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX425 |
| Bore size | Ø160 mm |
| Stroke | 425 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 SAI160BX425 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 SAI160BX425 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 SI160BX425
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×425 | 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 SI160BX425 Is Used
Heavy Machinery Forming
Drives large presses and forming fixtures requiring 10053 N thrust at 0.5 MPa with a 425 mm travel distance.
Corrosive Material Handling
Ideal for humid or washdown environments utilizing the SUS304 stainless steel piston rod for maximum corrosion resistance.
Replacing the Airtac SI160 Standard Cylinder SI160BX425 with the SAI160BX425
To replace the SI160BX425, order the SAI160BX425, confirming the ISO 15552 mounting interface, 160 mm bore, 425 mm stroke, G3/4 port, and mounting accessory. Because this SKU lacks a magnet (-S), it cannot support position sensing. If you need load holding, note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. With a 425 mm stroke, use external guides to prevent rod bending and side loads. Sizing both ways: neighboring bores offer 6136 N (125mm) or 15708 N (200mm) push at 0.5 MPa.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX425
- ✓ 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 SI160BX425 FAQ
Yes, the SI160BX425 is discontinued. The direct replacement is the SAI160BX425. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 425 mm stroke, force, G3/4 port, and mounting interface.
This double-acting cylinder features a G3/4 air port, a 40 mm piston rod, and an M36x2 rod thread. Force ratings are 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 max of 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX425
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX425 replacement — usually within 7-8 hours.