This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI160BX650S, 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 SI160BX650S
The AirTAC SI160 Standard Cylinder SI160BX650S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø160mm bore and 650mm stroke, G3/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI160BX650S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ160 mm
- Stroke650 mm
- Port sizeG3/4
- Acting typeDouble acting
- Rod threadM36×2.0
- StatusDiscontinued → SAI160BX650S
- 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 SI160BX650S
The AirTAC SI160BX650S is a discontinued double-acting ISO 15552 profile cylinder featuring a 160 mm bore, 650 mm stroke, and a SUS304 stainless steel piston rod. Delivering 10053 N of push force at 0.5 MPa, it is superseded by the direct replacement SAI160BX650S. This current-production replacement shares the exact G3/4 port, M36x2 thread, and ISO 15552 mounting interface, dropping directly into existing fixtures.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL and BSAI lock variants absent from the legacy SI line, while the original -S magnet supports CS1-B/DS1-B sensors.
Airtac SI160 Standard Cylinder SI160BX650S Technical Specifications
| Model | Airtac SI160 Standard Cylinder SI160BX650S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI160BX650S |
| Bore size | Ø160 mm |
| Stroke | 650 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 SAI160BX650S 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 SAI160BX650S 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 SI160BX650S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 160 | Bore size in mm. |
| ×650 | 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 SI160BX650S Is Used
Heavy Stamping Press
Drives large platens and heavy dies requiring 10053 N push force at 0.5 MPa, utilizing the SUS304 rod for corrosion resistance in humid shop environments.
Automated Assembly Fixture
Actuates heavy structural components using the ISO 15552 mounting interface, relying on the 50 mm adjustable cushions to decelerate massive loads.
Replacing the Airtac SI160 Standard Cylinder SI160BX650S with the SAI160BX650S
To replace the SI160BX650S, order the SAI160BX650S, confirming the ISO 15552 mounting interface, 650 mm stroke, G3/4 port, and the SUS304 stainless rod (-B). When sizing, a neighbouring 200 mm bore offers higher thrust, while dropping to 125 mm reduces the footprint but yields only 6136 N push at 0.5 MPa. Because the 650 mm stroke invites rod bending, use external guides to prevent side loads. A plain cylinder drifts on air loss—the 50 mm cushion only decelerates—so use an external rod lock or pilot check valve for load holding. The SAIL or BSAI lock variants are alternatives if you need integrated holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI160BX650S
- ✓ 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 SI160BX650S FAQ
Yes, the SI160BX650S is discontinued. The direct replacement is the SAI160BX650S. It is dimensionally interchangeable per ISO 15552, retaining the same 160 mm bore, 650 mm stroke, G3/4 port, and mounting interface, but features an upgraded piston seal.
This 160 mm bore cylinder has a G3/4 port. 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 max of 2050 kgf at 1.0 MPa. Operating speed is 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI160BX650S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI160BX650S replacement — usually within 7-8 hours.