This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X40SN, 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 SI32X40SN
The AirTAC SI32 Standard Air Cylinder SI32X40SN 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 SAI32X40SN, 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 → SAI32X40SN
- 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 SI32X40SN
The AirTAC SI32X40SN 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 SAI32X40SN. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, and force.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI32X40SN includes a -S magnet for legacy CS1-B/DS1-B sensors and an -N NBR seal (-20 to +70C). Note that plain cylinders drift without air; use the SAIL lock variant or external checks for holding.
Airtac SI32 Standard Air Cylinder SI32X40SN Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X40SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X40SN |
| 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 SAI32X40SN 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 SAI32X40SN 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 SI32X40SN
| 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 SI32X40SN Is Used
Component Sorting
Reliable actuation for diverting small electronic or plastic components on a conveyor line, utilizing the 30-800mm/s speed range.
Gate Diverting
Short-stroke motion control for pneumatic flap gates guiding materials, taking advantage of the 32mm bore's space-saving profile.
Replacing the Airtac SI32 Standard Air Cylinder SI32X40SN with the SAI32X40SN
To replace the SI32X40SN, order the SAI32X40SN direct, confirming the ISO 15552 interface, 32mm bore, 40mm stroke, G1/8 port, and mounting accessory. The -S magnet enables CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches. For sizing both ways: if you need more force, the next bore (40mm) yields 628N push at 0.5MPa; if you stay with 32mm but increase pressure to 0.7MPa, you get 563N. Remember, a plain cylinder does not hold load without live air—the cushion only decelerates. For load holding, use the SAIL (air-released lock) or BSAI (clamp-lock) variant, or an external pilot check valve. The SAIF variant adds a built-in 4M valve for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X40SN
- ✓ 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 SI32X40SN FAQ
Yes, the SI32X40SN is discontinued. The direct replacement is the AirTAC SAI32X40SN. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 40mm stroke, 402N force, G1/8 port, and mounting interface, but features an upgraded two Y-shaped element piston seal.
The G1/8 port is fixed by the 32mm bore. At 0.5MPa it provides 402N push and 345N pull force. At 0.7MPa push is 563N, and at 0.9MPa it is 724N. The theoretical maximum force is 82kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X40SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X40SN replacement — usually within 7-8 hours.