This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI50X130FB, 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 SI50X130FB
The AirTAC Airtac SI50 Standard Cylinder SI50X130FB 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 SAI50X130FB, 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 → SAI50X130FB
- 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 SI50X130FB
The AirTAC SI50X130FB is a discontinued double-acting ISO 15552 profile cylinder with a 50 mm bore and 130 mm stroke. It delivers 982 N push force at 0.5 MPa through a G1/4 port. The direct replacement is the SAI50X130FB, which matches the original ISO 15552 mounting interface, FB flange, output force, and stroke exactly.
The SAI upgrade features a revised piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S) and cannot accept CS1-B/DS1-B sensors. For high heat, Viton H seals raise the operating range to 0-150 C.
Airtac SI50 Standard Cylinder SI50X130FB Technical Specifications
| Model | Airtac SI50 Standard Cylinder SI50X130FB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI50X130FB |
| 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 SAI50X130FB 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 SAI50X130FB 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 SI50X130FB
| 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 SI50X130FB Is Used
Package Diverting
Uses the FB flange to mount rigidly over a conveyor, providing 982 N push force to actuate routing gates for medium weight parcels.
Replacing the Airtac SI50 Standard Cylinder SI50X130FB with the SAI50X130FB
To replace the SI50X130FB, order the SAI50X130FB keeping the 50 mm bore, 130 mm stroke, FB flange, and G1/4 port. Confirm the thread option (PT, G, or NPT) and rod material (carbon, SUS420J2 A, or SUS304 B). Because this non-magnetic SKU lacks a sensor groove piston ring, it cannot take switches; order a -S SAI variant if position sensing is required. Sizing both ways: a 40 mm bore yields 628 N push @0.5 MPa, while a 63 mm bore yields 1559 N. For load holding, note the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variant to prevent drift on air loss. At 130 mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI50X130FB
- ✓ 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 SI50X130FB FAQ
Yes, the SI50X130FB is discontinued. The direct replacement is the SAI50X130FB. It is dimensionally interchangeable per ISO 15552, maintaining the same 50 mm bore, 130 mm stroke, FB flange, G1/4 port, and 982 N output force.
This 50 mm bore double-acting cylinder uses 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. The piston rod is 20 mm with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI50X130FB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI50X130FB replacement — usually within 7-8 hours.