This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50BX130S, 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 SI50BX130S
The AirTAC Airtac SI50 Standard Cylinder SI50BX130S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 130mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI50BX130S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke130 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI50BX130S
- 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 SI50BX130S
The AirTAC SI50BX130S is a discontinued double-acting ISO 15552 profile cylinder with a 50mm bore, 130mm stroke, and a SUS304 stainless piston rod. Delivering 982 N push force at 0.5 MPa, it is replaced by the SAI50BX130S. This direct upgrade shares the same ISO 15552 mounting interface, G1/4 port, and M16x1.5 rod thread. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
The -S magnet supports legacy CS1-B/DS1-B sensors. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, consider the SAIL lock or BSAI clamp-lock variants the SI line lacked.
Airtac SI50 Standard Cylinder SI50BX130S Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50BX130S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50BX130S |
| Bore size | Ø50 mm |
| Stroke | 130 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 SAI50BX130S 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 SAI50BX130S 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 SI50BX130S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×130 | 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 SI50BX130S Is Used
Stainless Rod Diverter
Ideal for diverting packages on a washdown conveyor line, utilizing the SUS304 rod for corrosion resistance and 130mm stroke for crisp lateral movements.
Press Ejection
Ejects formed parts from a 50mm bore press fixture, where the adjustable 30mm air cushions absorb kinetic energy smoothly at the 130mm stroke ends.
Replacing the Airtac SI50 Standard Cylinder SI50BX130S with the SAI50BX130S
To replace the SI50BX130S, order the SAI50BX130S. Confirm the ISO 15552 mounting interface, 50mm bore, 130mm stroke, G1/4 port (PT/G/NPT), and mounting accessory. The -S magnet enables current AirTAC switches, replacing legacy CS1-B/DS1-B units. For sizing, the 50mm bore yields 982 N push at 0.5 MPa; if less force is needed, a 40mm bore provides 628 N. If more is needed, a 63mm bore offers 1559 N. Remember, a plain cylinder does not hold load without live air; use an external rod lock, pilot check valve, or the SAIL/BSAI variants for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50BX130S
- ✓ 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 SI50BX130S FAQ
Yes, the AirTAC SI50BX130S is discontinued. The direct replacement is the SAI50BX130S. It is dimensionally interchangeable per ISO 15552, maintaining the same 50mm bore, 130mm stroke, force, G1/4 port, and mounting interface.
The 50mm bore features a G1/4 air port and M16x1.5 rod thread. It delivers 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and 1767 N push at 0.9 MPa. The theoretical max force is 200 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50BX130S
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