This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX160, 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 SI50BX160
The AirTAC Airtac SI50 Standard Cylinder SI50BX160 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 SAI50BX160, 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 → SAI50BX160
- 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 SI50BX160
The AirTAC SI50BX160 is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore and 160mm stroke, delivering 982N push force at 0.5MPa. The direct replacement is the SAI50BX160, sharing the same G1/4 port, M16x1.5 rod thread, and mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a sensor; for position feedback order an SAI with -S.
Airtac SI50 Standard Cylinder SI50BX160 Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX160 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX160 |
| 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 SAI50BX160 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 SAI50BX160 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 SI50BX160
| 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 SI50BX160 Is Used
Package Diversion
Pushes medium-weight cartons off a main conveyor line using 982N of thrust at 0.5MPa.
Pallet Stopping
Acts as a pneumatic stop gate for incoming pallets, decelerating loads smoothly with its 30mm adjustable cushions.
Clamp Actuation
Drives a secondary clamping arm on a machining fixture, providing reliable 825N pull force for part holding.
Replacing the Airtac SI50 Standard Cylinder SI50BX160 with the SAI50BX160
To replace this SI50BX160, order the SAI50BX160, confirming the ISO 15552 interface, 50mm bore, 160mm stroke, G1/4 port, and mounting accessory. Because this specific SKU has no magnet (-S omitted), it cannot accept a CS1-B/DS1-B switch; if you need position sensing, select an SAI50BX160S. For sizing, the 50mm bore yields 982N push at 0.5MPa; if undersized, the 63mm bore offers 1559N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 160mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX160
- ✓ 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 SI50BX160 FAQ
Yes, the SI50BX160 is discontinued. The direct replacement is the SAI50BX160. It is dimensionally interchangeable per ISO 15552, retaining the same 50mm bore, 160mm stroke, G1/4 port, and mounting interface.
The 50mm bore features a G1/4 air port and M16x1.5 rod thread. It delivers 982N push and 825N pull at 0.5MPa, 1374N push at 0.7MPa, 1767N push at 0.9MPa, and a theoretical max of 200kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX160
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50BX160 replacement — usually within 7-8 hours.