This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32AX250S, 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 SI32AX250S
The AirTAC SI32 Standard Air Cylinder SI32AX250S 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 SAI32AX250S, 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 → SAI32AX250S
- 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 SI32AX250S
The AirTAC SI32AX250S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore, 250mm stroke, and SUS420J2 stainless steel rod. It delivers 402N push and 345N pull at 0.5MPa via a G1/8 port. AirTAC replaced it with the SAI32AX250S, a direct upgrade retaining the exact interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The -S magnet works with CS1-B/DS1-B sensors, while SAIL/BSAI lock variants the SI lacked are now available.
Airtac SI32 Standard Air Cylinder SI32AX250S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32AX250S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32AX250S |
| 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 SAI32AX250S 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 SAI32AX250S 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 SI32AX250S
| 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 SI32AX250S Is Used
Small Part Ejection
Uses the 402N push force at 0.5MPa to reliably push lightweight machined components out of an aluminum fixture.
Package Diverting
Actuates a routing gate on a packaging line, where the 250mm stroke provides sufficient travel to redirect boxes.
Lab Test Positioning
Moves a testing head over samples, leveraging the SUS420J2 stainless rod to resist humidity in environmental chambers.
Replacing the Airtac SI32 Standard Air Cylinder SI32AX250S with the SAI32AX250S
To replace the SI32AX250S, order the SAI32AX250S: it matches the ISO 15552 mounting, 32mm bore, 250mm stroke, G1/8 port, and M10x1.25 thread. The -A rod is SUS420J2 stainless, and -S denotes the magnet for CS1-B/DS1-B switches. For higher force, the 40mm bore yields 628N push at 0.5MPa; for less, there is no smaller ISO 15552 bore. At 250mm stroke, use guides to prevent rod bending from side loads. The cushion only decelerates; for load holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32AX250S
- ✓ 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 SI32AX250S FAQ
Yes, the SI32AX250S is discontinued. The direct replacement is the SAI32AX250S. It is dimensionally interchangeable per ISO 15552, keeping the same 32mm bore, 250mm stroke, force, G1/8 port, and mounting fixtures.
This double-acting cylinder has a G1/8 port. It generates 402N push and 345N pull at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical max of 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32AX250S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32AX250S replacement — usually within 7-8 hours.