This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX425, 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 SI160AX425
The AirTAC Airtac SI160 Standard Cylinder SI160AX425 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 SAI160AX425, 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 → SAI160AX425
- 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 SI160AX425
The AirTAC SI160AX425 is a discontinued double-acting ISO 15552 profile cylinder with a 160mm bore and 425mm stroke. Delivering 10053N push force at 0.5MPa, it features a 40mm carbon steel rod, M36x2 thread, and 50mm adjustable cushions. The direct replacement is the SAI160AX425, matching the interface, port (G3/4), and output exactly.
This SKU uses a SUS420J2 stainless rod (-A) but lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. The SAI upgrade introduces a two-piece Y-shaped piston seal for low start-up pressure.
Airtac SI160 Standard Cylinder SI160AX425 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX425 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX425 |
| 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 SAI160AX425 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 SAI160AX425 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 SI160AX425
| 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 SI160AX425 Is Used
Heavy Stamping Press
Drives large heavy-duty stamping dies requiring 10053N push force at 0.5MPa with stable 425mm travel.
Automated Welding Clamp
Actuates robust welding fixtures using the SUS420J2 stainless rod to resist weld spatter and corrosion.
Replacing the Airtac SI160 Standard Cylinder SI160AX425 with the SAI160AX425
To replace the SI160AX425, order the SAI160AX425. Verify the ISO 15552 mounting interface, 425mm stroke, G3/4 port, and accessory type. Because this SKU lacks the -S magnet, it cannot support position sensing; if switches are needed, specify a magnet on the SAI order. The 425mm stroke demands external guides to prevent rod bending and side-load wear. For sizing alternatives, a 125mm bore yields 6136N [email protected], while a 200mm bore provides 15708N. Note that a plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX425
- ✓ 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 SI160AX425 FAQ
Yes, the SI160AX425 is discontinued. The direct replacement is the SAI160AX425. It is dimensionally interchangeable per ISO 15552, retaining the same 160mm bore, 425mm stroke, output force, G3/4 port, and mounting interface.
This double-acting cylinder has a G3/4 air port. It delivers 10053N push and 9425N pull at 0.5MPa, 14074N push at 0.7MPa, 18095N push at 0.9MPa, and a theoretical max of 2050 kgf at 1.0MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160AX425
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX425 replacement — usually within 7-8 hours.