This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX160S, 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 SI50 Standard Cylinder SI50BX160S
The AirTAC Airtac SI50 Standard Cylinder SI50BX160S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 160mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50BX160S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50BX160S
- 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 SI50 Standard Cylinder SI50BX160S
The AirTAC SI50BX160S is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore, 160 mm stroke, and a SUS304 stainless piston rod. Generating 982 N push force at 0.5 MPa, it is replaced by the SAI50BX160S. This direct upgrade matches the G1/4 port, M16x1.5 thread, and ISO 15552 mounting interface, dropping directly into existing fixtures.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SI-SKU includes a piston magnet for legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants absent in the SI line.
Airtac SI50 Standard Cylinder SI50BX160S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX160S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX160S |
| Bore size | Ø50 mm |
| Stroke | 160 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI50BX160S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAI50BX160S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI50 Standard Cylinder SI50BX160S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×160 | 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 SI50 Standard Cylinder SI50BX160S Is Used
Packaging Diversion
Pushes light cartons on a washdown packaging line using the SUS304 rod option to resist moisture and corrosion during frequent wash cycles.
Pneumatic Clamping
Clamps aluminum extrusions for cutting operations, providing 982 N of push force while the compact profile barrel saves space.
Replacing the Airtac SI50 Standard Cylinder SI50BX160S with the SAI50BX160S
To replace the SI50BX160S, order the SAI50BX160S. Confirm the ISO 15552 mounting interface, 50 mm bore, 160 mm stroke, G1/4 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -B SUS304 rod are retained. Size both ways: the neighboring 40 mm bore yields 628 N push at 0.5 MPa, while the 63 mm bore yields 1559 N. Note that a plain cylinder drifts on air loss; the air cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 160 mm stroke, side-load is moderate, but ensure guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX160S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI50 Standard Cylinder SI50BX160S FAQ
Yes, the AirTAC SI50BX160S is discontinued. The direct replacement is the SAI50BX160S. It is dimensionally interchangeable per ISO 15552, retaining the same 50 mm bore, 160 mm stroke, G1/4 port, and mounting interface.
This double-acting cylinder has a G1/4 air port. It generates 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical maximum of 200 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX160S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX160S replacement — usually within 7-8 hours.