This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X50FB, 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 SI32 Standard Air Cylinder SI32X50FB
The AirTAC SI32 Standard Air Cylinder SI32X50FB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 50mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X50FB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke50 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X50FB
- 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 SI32 Standard Air Cylinder SI32X50FB
The AirTAC SI32X50FB is a discontinued double-acting ISO 15552 profile cylinder delivering 402 N push force at 0.5 MPa through a 32 mm bore and 50 mm stroke. AirTAC replaced this legacy unit with the SAI32X50FB. The SAI direct matches the ISO 15552 mounting interface, FB flange, G1/8 port and M10x1.25 rod thread, fitting existing fixtures perfectly.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This non-magnet SKU cannot take a sensor, unlike the CS1-B/DS1-B switches used on -S models.
Airtac SI32 Standard Air Cylinder SI32X50FB Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X50FB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X50FB |
| Bore size | Ø32 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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, 27 mm |
| Max standard stroke | Up to 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI32X50FB carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The SAI32X50FB produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32X50FB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×50 | 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 SI32 Standard Air Cylinder SI32X50FB Is Used
Small Part Ejection
Ideal for pushing light finished components out of a machining center using the 402 N push force and 50 mm stroke.
Clamp Actuation
Provides reliable clamping pressure for small fixtures where a compact 32 mm bore and FB flange mount are required.
Gate Diverting
Suitable for short-stroke diverting arms on conveyor lines, moving lightweight product flows efficiently.
Replacing the Airtac SI32 Standard Air Cylinder SI32X50FB with the SAI32X50FB
To replace the SI32X50FB, order the SAI32X50FB keeping the 32 mm bore, 50 mm stroke and FB flange. Confirm the ISO 15552 interface dimensions, G1/8 port and M10x1.25 thread. Because this lacks the -S magnet, it cannot accept position switches. If sizing up, the 40 mm bore yields 628 N push at 0.5 MPa; sizing down is not available below 32 mm. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL lock and SAIF valve variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X50FB
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI32 Standard Air Cylinder SI32X50FB FAQ
Yes, the SI32X50FB is discontinued. The direct replacement is the SAI32X50FB. It shares the same ISO 15552 mounting interface, 32 mm bore, 50 mm stroke, FB flange and G1/8 port, fitting directly into existing setups.
This double-acting cylinder has a 12 mm rod, M10x1.25 thread, 27 mm cushion and operates at 30-800 mm/s. Force ratings are 402 N push and 345 N pull at 0.5 MPa, 563 N push at 0.7 MPa, and a maximum theoretical force of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X50FB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X50FB replacement — usually within 7-8 hours.