This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X270S, 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 SI32X270S
The AirTAC SI32 Standard Air Cylinder SI32X270S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 270mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X270S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke270 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X270S
- 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 SI32X270S
The AirTAC SI32X270S is a discontinued double-acting ISO 15552 profile cylinder with a 32mm bore and 270mm stroke. Delivering 402N push force at 0.5MPa via a G1/8 port, it is replaced by the SAI32X270S. This direct successor shares the exact ISO 15552 mounting interface, bore, stroke, force and accessories, fitting existing fixtures perfectly.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family adds SAIL, SAIF and BSAI variants the SI lacked. This -S model uses CS1-B/DS1-B sensors.
Airtac SI32 Standard Air Cylinder SI32X270S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X270S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X270S |
| Bore size | Ø32 mm |
| Stroke | 270 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 SAI32X270S 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 SAI32X270S 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 SI32X270S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×270 | 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 SI32X270S Is Used
Small Part Ejection
Ideal for pushing light machined components out of a CNC fixture using the 402N push force at 0.5MPa.
Package Diverting
Actuates a routing gate on a 30-800mm/s packaging line, with the 270mm stroke clearing the belt profile.
Compact Clamping
Secures thin workpieces in a welding cell where the 32mm bore profile saves space without sacrificing grip.
Replacing the Airtac SI32 Standard Air Cylinder SI32X270S with the SAI32X270S
To replace the SI32X270S, order the SAI32X270S. Verify the ISO 15552 mounting interface, 32mm bore, 270mm stroke, G1/8 port (PT/G/NPT thread options), M10x1.25 rod thread, and the -S magnet for current AirTAC switch compatibility. Sizing both ways: a 40mm bore yields 628N push at 0.5MPa, while dropping to 0.3MPa on this 32mm bore yields ~241N. Note that plain cylinders drift on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. Since the 270mm stroke exceeds 300mm? No, but for any stroke >=300mm add a guide to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X270S
- ✓ 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 SI32X270S FAQ
Yes, the SI32X270S is discontinued. The direct replacement is the SAI32X270S. It is dimensionally interchangeable per ISO 15552, matching the 32mm bore, 270mm stroke, G1/8 port, force, and mounting accessories.
The 32mm bore has a G1/8 port. Forces 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. It operates at 30-800mm/s with a 27mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X270S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X270S replacement — usually within 7-8 hours.