This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X40, 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 SI32X40
The AirTAC SI32 Standard Air Cylinder SI32X40 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 SAI32X40, 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 → SAI32X40
- 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 SI32X40
The AirTAC SI32X40 is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 40mm stroke. It delivers 402N push force at 0.5MPa via a G1/8 port. AirTAC replaced this legacy unit with the SAI32X40, a direct upgrade retaining the exact interface, output, and mounting dimensions.
The SAI32X40 features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors.
Airtac SI32 Standard Air Cylinder SI32X40 Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X40 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X40 |
| 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 SAI32X40 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 SAI32X40 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 SI32X40
| 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 SI32X40 Is Used
Small Part Ejection
Uses the 402N push force at 0.5MPa to reliably push lightweight molded plastic parts out of an injection mold cavity.
Clamp Actuation
Provides short 40mm stroke movement for securing thin material workpieces in automated machining fixtures.
Package Diverting
Drives a small diverter arm to sort small boxes on a conveyor line within the 30-800mm/s speed range.
Replacing the Airtac SI32 Standard Air Cylinder SI32X40 with the SAI32X40
To replace the SI32X40, order the SAI32X40. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G1/8 port thread (PT/G/NPT), and the M10x1.25 rod end. Since this SKU has no magnet, it cannot support position sensing; if you need switches, select an SAI32X40S and use current AirTAC sensors. If neighbouring bores are considered, a 40mm bore yields 628N push at 0.5MPa. For load holding on air loss, note the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X40
- ✓ 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 SI32X40 FAQ
Yes, the SI32X40 is discontinued. The direct replacement is the AirTAC SAI32X40. It is dimensionally interchangeable per ISO 15552, maintaining the same 32mm bore, 40mm stroke, force, G1/8 port, and mounting interface.
The 32mm bore features a G1/8 air port and M10x1.25 rod thread. It outputs 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.
Request a Quote for the SAI32X40
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X40 replacement — usually within 7-8 hours.