This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32AX425S, 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 SI32AX425S
The AirTAC SI32 Standard Air Cylinder SI32AX425S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 425mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32AX425S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke425 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32AX425S
- 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 SI32AX425S
The AirTAC SI32AX425S is a discontinued double-acting ISO 15552 profile cylinder featuring a 32mm bore, 425mm stroke, G1/8 port, and a SUS420J2 stainless piston rod. It delivers a push force of 402 N at 0.5 MPa. The direct replacement is the SAI32AX425S, which matches the exact bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI32 Standard Air Cylinder SI32AX425S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32AX425S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32AX425S |
| Bore size | Ø32 mm |
| Stroke | 425 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 SAI32AX425S 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 SAI32AX425S 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 SI32AX425S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×425 | 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 SI32AX425S Is Used
Light-Duty Part Ejection
Uses the 402 N push force at 0.5 MPa to eject small machined components from a fixture, relying on the 425mm stroke to clear the work area completely.
Small Pallet Positioning
Shifts empty pallets into alignment with a vertical lift capacity around 20 kg, requiring external guides to manage the 425mm stroke safely.
Replacing the Airtac SI32 Standard Air Cylinder SI32AX425S with the SAI32AX425S
To replace this SI32AX425S, order the SAI32AX425S. Confirm the ISO 15552 mounting interface, 32mm bore, 425mm stroke, G1/8 port, and mounting accessory. The -A denotes a SUS420J2 stainless rod, and -S indicates a piston magnet for CS1-B/DS1-B switches. If you need more force, the adjacent 40mm bore yields 628 N push at 0.5 MPa; if less is acceptable, there is no smaller ISO 15552 standard bore. Because this is a 425mm stroke, use an external guide to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32AX425S
- ✓ 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 SI32AX425S FAQ
Yes, the SI32AX425S is discontinued. The direct replacement is the SAI32AX425S. It shares the same ISO 15552 mounting interface, 32mm bore, 425mm stroke, G1/8 port, and output force, fitting directly into existing fixtures.
It features a G1/8 air port. The force ratings are: push 402 N and pull 345 N at 0.5 MPa, push 563 N at 0.7 MPa, push 724 N at 0.9 MPa, and a theoretical max of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32AX425S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32AX425S replacement — usually within 7-8 hours.