This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X250S, 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 SI32X250S
The AirTAC SI32 Standard Air Cylinder SI32X250S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 250mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X250S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X250S
- 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 SI32X250S
The AirTAC SI32X250S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 250mm stroke. It delivers 402N push force at 0.5MPa via a G1/8 port. AirTAC replaced this legacy unit with the SAI32X250S, a direct sharing the exact interface, bore, stroke, force and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF and BSAI variants the SI lacked. The -S suffix means a piston magnet for CS1-B/DS1-B sensors.
Airtac SI32 Standard Air Cylinder SI32X250S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X250S |
| Bore size | Ø32 mm |
| Stroke | 250 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 SAI32X250S 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 SAI32X250S 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 SI32X250S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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 SI32X250S Is Used
Small Part Ejection
Ideal for pushing lightweight machined components out of a fixture using the 402N push force at 0.5MPa.
Package Diverting
Actuates a routing gate on a packaging line, benefiting from the 250mm stroke and 30-800mm/s speed range.
Replacing the Airtac SI32 Standard Air Cylinder SI32X250S with the SAI32X250S
To replace the SI32X250S, order the SAI32X250S. Confirm the ISO 15552 mounting interface, 32mm bore, 250mm stroke, G1/8 port (PT/G/NPT thread), and mounting accessory match your fixture. The -S magnet enables CS1-B/DS1-B switches; the SAI uses current AirTAC switches. Sizing both ways: the 32mm bore gives 402N push at 0.5MPa, while the neighbouring 40mm bore offers 628N. For strokes over 300mm, guide external rods to prevent side-load bending. 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.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X250S
- ✓ 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 SI32X250S FAQ
Yes, the SI32X250S is discontinued. The direct replacement is the SAI32X250S. It shares the identical ISO 15552 mounting interface, 32mm bore, 250mm stroke, output force, G1/8 port and accessories, fitting existing fixtures perfectly.
This 32mm bore double-acting cylinder features a G1/8 air port and M10x1.25 rod thread. It delivers 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical maximum force of 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X250S replacement — usually within 7-8 hours.