This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X40STC, 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 SI32X40STC
The AirTAC SI32 Standard Air Cylinder SI32X40STC 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 SAI32X40STC, 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 → SAI32X40STC
- 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 SI32X40STC
The AirTAC SI32X40STC is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 40mm stroke. Delivering 402N push force at 0.5MPa via a G1/8 port, it is replaced by the SAI32X40STC. This direct successor matches the exact TC trunnion mounting, M10x1.25 rod thread, and output force, fitting existing fixtures seamlessly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the SI line. Your -S magnet version supports legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI32 Standard Air Cylinder SI32X40STC Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X40STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X40STC |
| 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 SAI32X40STC 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 SAI32X40STC 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 SI32X40STC
| 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 SI32X40STC Is Used
Small Part Ejection
Uses the 402N push force at 0.5MPa to reliably push lightweight machined components out of a fixture on an assembly line.
Clamp Actuation
The 40mm short stroke and TC trunnion mount provide precise, compact clamping pressure for holding thin material blanks during secondary machining.
Diverting Mechanism
Powers a short-stroke sorting gate to redirect small electronic parts on a conveyor belt, operating efficiently at 30-800mm/s.
Replacing the Airtac SI32 Standard Air Cylinder SI32X40STC with the SAI32X40STC
To replace the SI32X40STC, order the SAI32X40STC. Verify the ISO 15552 TC trunnion mount, 40mm stroke, G1/8 port, and -S magnet. Sizing checks: this 32mm bore yields 402N push at 0.5MPa; dropping to a smaller bore cuts force, while a 40mm bore offers 628N. Note that 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 variant. If you need self-contained control, the SAIF variant integrates a 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X40STC
- ✓ 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 SI32X40STC FAQ
Yes, the AirTAC SI32X40STC is discontinued. The direct replacement is the SAI32X40STC. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 40mm stroke, G1/8 port, TC mount, and output force exactly.
The G1/8 port feeds a 12mm rod. Force ratings are: 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. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X40STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X40STC replacement — usually within 7-8 hours.