This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X400S, 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 SI32X400S
The AirTAC SI32 Standard Air Cylinder SI32X400S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 400mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X400S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke400 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X400S
- 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 SI32X400S
The AirTAC SI32X400S is a discontinued double-acting ISO 15552 profile cylinder with a 32 mm bore and 400 mm stroke. It delivers 402 N push force at 0.5 MPa through a G1/8 port. AirTAC replaced this unit with the SAI32X400S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and accessories.
The SAI upgrade features a modernized piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also introduces lock and self-valve variants (SAIL, SAIF, BSAI) absent in the legacy SI line. This -S SKU includes a piston magnet for CS1-B/DS1-B switches.
Airtac SI32 Standard Air Cylinder SI32X400S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X400S |
| Bore size | Ø32 mm |
| Stroke | 400 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 SAI32X400S 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 SAI32X400S 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 SI32X400S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×400 | 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 SI32X400S Is Used
Package Diverting
Sorts light cartons on packaging lines where the 402 N push force at 0.5 MPa easily overcomes friction and the 400 mm stroke clears adjacent lanes.
Small Part Ejection
Pushes completed plastic or machined components out of press fixtures, using the 20 kg vertical lift capacity to drop parts into collection bins.
Light Gate Actuation
Cycles lightweight safety gates or airflow dampers, benefiting from the 30-800 mm/s speed range and adjustable 27 mm end cushions.
Replacing the Airtac SI32 Standard Air Cylinder SI32X400S with the SAI32X400S
To replace the SI32X400S, order the SAI32X400S. Confirm the ISO 15552 mounting interface, 32 mm bore, 400 mm stroke, G1/8 port (PT/G/NPT threads), and mounting accessory. The -S suffix means your original used CS1-B/DS1-B reed switches; the SAI replacement uses current AirTAC sensors. For sizing both ways, a 40 mm bore offers 628 N push at 0.5 MPa if you need more force, while the 32 mm bore itself yields 345 N pull. Note that a plain cylinder drifts on air loss—the cushion only decelerates, so use an external rod lock or pilot check valve for load holding, or step up to the SAIL/BSAI lock variant. Because the 400 mm stroke exceeds 300 mm, add external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X400S
- ✓ 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 SI32X400S FAQ
Yes, the SI32X400S is discontinued. The direct replacement is the AirTAC SAI32X400S. It shares the same ISO 15552 mounting interface, 32 mm bore, 400 mm stroke, output force, G1/8 port, and accessories, fitting directly into existing fixtures.
The 32 mm bore uses a G1/8 port and features a 12 mm rod with an M10x1.25 thread. Force output is 402 N push and 345 N pull at 0.5 MPa, 563 N push at 0.7 MPa, 724 N push at 0.9 MPa, and a theoretical maximum of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X400S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X400S replacement — usually within 7-8 hours.