This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32AX40, 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 SI32AX40
The AirTAC SI32 Standard Air Cylinder SI32AX40 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 40mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32AX40, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32AX40
- 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 SI32AX40
The AirTAC SI32AX40 is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 40mm stroke. Delivering 402N push force at 0.5MPa, it features a 12mm carbon steel rod, M10x1.25 thread, G1/8 port and 27mm cushions. The direct replacement is the SAI32AX40, which shares identical ISO 15552 mounting, force and porting. This SKU lacks a magnet (-S), so it cannot accept a CS1-B/DS1-B sensor.
The SAI32AX40 upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent from the SI line. An -A rod denotes SUS420J2 stainless steel, and Viton H seals raise heat resistance to 150C.
Airtac SI32 Standard Air Cylinder SI32AX40 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32AX40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32AX40 |
| Bore size | Ø32 mm |
| Stroke | 40 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 SAI32AX40 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 SAI32AX40 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 SI32AX40
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×40 | 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 SI32AX40 Is Used
Small Part Clamping
Ideal for securing lightweight machined components during secondary milling or drilling operations with a safe 241N working load.
Ejector Mechanisms
Provides reliable 40mm ejection strokes to push finished small parts out of molding or forming dies at up to 800 mm/s.
Gate Diverting
Actuates small pneumatic flaps or diverter gates on compact packaging conveyors where a 20kg vertical lift capacity is sufficient.
Replacing the Airtac SI32 Standard Air Cylinder SI32AX40 with the SAI32AX40
To replace the SI32AX40, order the SAI32AX40. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 40mm stroke, 12mm rod, M10x1.25 thread and G1/8 port. Confirm your mounting accessory (LB, FA, TC) and thread standard (PT, G, NPT). Because this specific SKU has no -S magnet, it cannot support position sensing; if you need switches, select the SAI32AX40S and use current AirTAC sensors. For loads needing 724N push at 0.9MPa, step up to a 40mm bore; for lighter duties, a 20kg vertical lift is safe here. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32AX40
- ✓ 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 SI32AX40 FAQ
Yes, the SI32AX40 is discontinued. The direct replacement is the SAI32AX40. It shares the exact ISO 15552 mounting interface, 32mm bore, 40mm stroke, output force and G1/8 port, fitting existing fixtures perfectly.
This double-acting cylinder features a G1/8 air port. It delivers a push force of 402N and pull of 345N at 0.5MPa, 563N push at 0.7MPa, 724N push at 0.9MPa, and a theoretical maximum of 82kgf at 1.0MPa.
Request a Quote for the SAI32AX40
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32AX40 replacement — usually within 7-8 hours.