This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160AX280S, 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 SI160AX280S
The AirTAC Airtac SI160 Standard Cylinder SI160AX280S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 280mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160AX280S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke280 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160AX280S
- 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 SI160AX280S
The AirTAC SI160AX280S is a discontinued double-acting ISO 15552 profile cylinder with a 160 mm bore and 280 mm stroke. It delivers 10053 N push force at 0.5 MPa via a G3/4 port. AirTAC replaced this legacy unit with the SAI160AX280S, a direct replacement matching the exact ISO 15552 mounting interface, stroke, output force, and accessories.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This specific SI160AX280S variant includes the SUS420J2 stainless steel rod (A) and a piston magnet (S) for legacy CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160AX280S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160AX280S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160AX280S |
| Bore size | Ø160 mm |
| Stroke | 280 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 SAI160AX280S 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 SAI160AX280S 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 SI160AX280S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×280 | 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 SI160AX280S Is Used
Heavy Press Clamping
Generates 10053 N at 0.5 MPa to secure large metal castings or heavy machinery frames during high-stress machining and press operations.
Industrial Stamping
Drives robust 280 mm strokes for forming thick steel plates, utilizing the 50 mm adjustable air cushions to absorb massive end-of-stroke kinetic energy.
Replacing the Airtac SI160 Standard Cylinder SI160AX280S with the SAI160AX280S
To replace the SI160AX280S, order the SAI160AX280S. Confirm the ISO 15552 mounting interface, 160 mm bore, 280 mm stroke, G3/4 port, and mounting accessory. The SAI family adds SAIL (air-released lock), SAIF (built-in 4M valve) and BSAI (clamp-lock) variants the SI lacked. A plain cylinder drifts on air loss as the cushion only decelerates; use SAIL, BSAI, or an external pilot check valve for load holding. At 280 mm stroke, watch for side-load and rod-bending; use guide rails. Neighbouring bores: 125 mm yields 6136 N push, 200 mm yields 15708 N push at 0.5 MPa.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160AX280S
- ✓ 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 SI160AX280S FAQ
Yes, the SI160AX280S is discontinued. The direct replacement is the SAI160AX280S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 280 mm stroke, force, G3/4 port, and mounting interface.
This double-acting cylinder features a G3/4 port and a 40 mm piston rod. It delivers 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 maximum of 2050 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160AX280S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160AX280S replacement — usually within 7-8 hours.