This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX425S, 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 SI160BX425S
The AirTAC Airtac SI160 Standard Cylinder SI160BX425S 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 SAI160BX425S, 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 → SAI160BX425S
- 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 SI160BX425S
The AirTAC SI160BX425S is a discontinued double-acting ISO 15552 profile cylinder featuring a 160mm bore, 425mm stroke, and a SUS304 stainless steel piston rod. Delivering 10053N push force at 0.5MPa, it is replaced by the direct replacement SAI160BX425S, which shares the exact ISO 15552 mounting interface, G3/4 port, and M36x2 thread.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. The SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI160 Standard Cylinder SI160BX425S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX425S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX425S |
| 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 SAI160BX425S 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 SAI160BX425S 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 SI160BX425S
| 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 SI160BX425S Is Used
Heavy Machinery Forming
Drives large presses and forming fixtures where the 10053N push force at 0.5MPa handles substantial metalworking resistance.
Large Clamp Presses
Holds heavy components during machining, relying on the 425mm stroke to accommodate wide material spans.
Replacing the Airtac SI160 Standard Cylinder SI160BX425S with the SAI160BX425S
To replace this SI160BX425S, order the SAI160BX425S. Confirm the ISO 15552 interface, 425mm stroke, G3/4 port, and the -B SUS304 rod / -S magnet (legacy CS1-B/DS1-B sensors). If sizing both ways, compare neighbouring bores and the 14074N [email protected]. A plain cylinder drifts on air loss; cushions only decelerate, so use an external rod lock or pilot check valve for load holding. For this 425mm stroke, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX425S
- ✓ 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 SI160BX425S FAQ
Yes, the SI160BX425S is discontinued. The direct replacement is the SAI160BX425S. It is dimensionally interchangeable per ISO 15552, retaining the same 160mm bore, 425mm stroke, output force, G3/4 port, and mounting interface.
It has a 160mm bore, 425mm stroke, M36x2 rod thread, 50mm cushions, and operates at 30-500mm/s. Force ratings are: push 10053N and pull 9425N at 0.5MPa, push 14074N at 0.7MPa, push 18095N at 0.9MPa, and a theoretical max of 2050kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX425S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX425S replacement — usually within 7-8 hours.