This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X400SN, 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 SI32X400SN
The AirTAC SI32 Standard Air Cylinder SI32X400SN 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 SAI32X400SN, 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 → SAI32X400SN
- 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 SI32X400SN
The AirTAC SI32X400SN is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 400mm stroke. It delivers 402N push force at 0.5MPa via a G1/8 port. AirTAC replaced this legacy unit with the SAI32X400SN, a direct upgrade retaining the exact interface, bore, stroke, and mounting fixtures. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. It also adds SAIL, SAIF, and BSAI lock variants the SI lacked.
This unit includes a piston magnet for CS1-B/DS1-B switches and an NBR seal rated for -20 to +70C. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock or the SAIL/BSAI variant.
Airtac SI32 Standard Air Cylinder SI32X400SN Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X400SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X400SN |
| 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 SAI32X400SN 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 SAI32X400SN 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 SI32X400SN
| 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 SI32X400SN Is Used
Component Ejection
Uses the 402N push force at 0.5MPa to eject small machined parts from a fixture, relying on the 400mm stroke to clear the workspace entirely.
Package Sorting
Actuates a 400mm routing arm on a packaging line, where the 20kg vertical lift capacity easily handles light cardboard box diversion tasks.
Light Tray Handling
Pushes standard component trays between workstations, taking advantage of the compact 32mm bore and the 30-800mm/s speed range for rapid cycling.
Replacing the Airtac SI32 Standard Air Cylinder SI32X400SN with the SAI32X400SN
To replace the SI32X400SN, order the SAI32X400SN. Confirm the ISO 15552 mounting interface, 32mm bore, 400mm stroke, G1/8 port (PT/G/NPT thread), and mounting accessory. The S magnet allows CS1-B/DS1-B sensors, though the SAI uses current AirTAC switches. The NBR N seal handles -20 to +70C; choose Viton H for up to 150C. If you need more force, the neighbouring 40mm bore provides 628N push at 0.5MPa. If less is needed, drop to a 25mm bore. Because the 400mm stroke exceeds 300mm, use an external guide to prevent rod bending and side-load damage. A plain cylinder does not hold load without air; use a pilot check valve or the SAIL/BSAI lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X400SN
- ✓ 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 SI32X400SN FAQ
Yes, the AirTAC SI32X400SN is discontinued. The direct replacement is the SAI32X400SN. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 400mm stroke, G1/8 port, and mounting interface, so it fits existing fixtures perfectly.
The 32mm bore features a G1/8 port and an M10x1.25 rod thread. It delivers 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. The speed range is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X400SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X400SN replacement — usually within 7-8 hours.