This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX250, 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 SI160AX250
The AirTAC Airtac SI160 Standard Cylinder SI160AX250 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 250mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160AX250, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke250 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160AX250
- 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 SI160AX250
The AirTAC SI160AX250 is a discontinued double-acting ISO 15552 profile cylinder with a 160mm bore and 250mm stroke. It delivers 10053N push force at 0.5MPa via a G3/4 port. The direct replacement is the SAI160AX250, retaining the exact ISO 15552 mounting interface, M36x2 rod thread, and 50mm cushions. This SKU features a SUS420J2 stainless steel rod (-A) and lacks a magnet, meaning it cannot accept position sensors.
The SAI160AX250 upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. For load holding, note that a plain cylinder drifts on air loss—the cushion only decelerates. Use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI160 Standard Cylinder SI160AX250 Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX250 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX250 |
| Bore size | Ø160 mm |
| Stroke | 250 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 SAI160AX250 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 SAI160AX250 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 SI160AX250
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×250 | 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 SI160AX250 Is Used
Heavy Press Forming
Ideal for high-tonnage pressing and stamping tasks, utilizing the 10053N push force at 0.5MPa to form rigid materials reliably.
Large Clamp Actuation
Secures oversized workpieces in machining centers, relying on the rigid 40mm SUS420J2 stainless rod to resist side loads.
Replacing the Airtac SI160 Standard Cylinder SI160AX250 with the SAI160AX250
To replace the SI160AX250, order the SAI160AX250. It drops directly into existing ISO 15552 fixtures with the same 160mm bore, 250mm stroke, G3/4 port, and mounting accessories. Because this specific SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, specify an SAI160X250S. The -A rod material denotes the SUS420J2 stainless steel option, which you should retain if corrosion resistance is required. For sizing, the neighbouring 125mm bore yields 6136N push at 0.5MPa, while the 200mm bore yields 15708N. At 0.7MPa, this 160mm bore outputs 14074N. If your application requires holding a load without live air, select the SAIL air-released lock or BSAI clamp-lock variant, as standard cushions only decelerate. Since the 250mm stroke is under 300mm, extreme side-load rod bending is less critical, but always ensure guide alignment to maximize seal life.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX250
- ✓ 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 SI160AX250 FAQ
Yes, the SI160AX250 is discontinued. The direct replacement is the SAI160AX250. It shares the identical ISO 15552 mounting interface, 160mm bore, 250mm stroke, output force, G3/4 port, and 50mm adjustable cushions, fitting existing fixtures perfectly.
The 160mm bore uses a G3/4 port. It generates 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 SAI160AX250
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