This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X250STC, 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 SI32X250STC
The AirTAC SI32 Standard Air Cylinder SI32X250STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 250mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X250STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke250 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X250STC
- 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 SI32X250STC
The AirTAC SI32X250STC is a discontinued double-acting ISO 15552 profile cylinder. Delivering 402 N push force at 0.5 MPa, it features a 32 mm bore, 250 mm stroke, G1/8 port, and TC trunnion mounting. The direct replacement is the SAI32X250STC, retaining identical ISO 15552 mounting dimensions, output force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI32 Standard Air Cylinder SI32X250STC Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X250STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X250STC |
| Bore size | Ø32 mm |
| Stroke | 250 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 SAI32X250STC 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 SAI32X250STC 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 SI32X250STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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 SI32X250STC Is Used
Compact Part Ejection
Uses the 402 N push force to eject small machined components from a fixture, leveraging the 250 mm stroke to clear the workspace entirely.
Light Package Diverting
Actuates a routing gate on a packaging line, where the TC trunnion mount absorbs lateral stress and the 32 mm bore provides swift 30-800 mm/s cycling.
Small Tray Indexing
Pushes lightweight storage trays into position, relying on the 20 kg vertical lift capacity to raise low-friction loads onto a transfer bed.
Replacing the Airtac SI32 Standard Air Cylinder SI32X250STC with the SAI32X250STC
To replace the SI32X250STC, order the SAI32X250STC. Confirm the ISO 15552 TC trunnion mount, 32 mm bore, 250 mm stroke, G1/8 port, and the -S magnet. Sizing down, a 32 mm bore yields 402 N push at 0.5 MPa; sizing up to 40 mm gives 628 N. Note that a standard cylinder drifts without live air—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL lock variant. At 250 mm stroke, ensure guide alignment to prevent rod bending side-loads. Rod material options include carbon steel, SUS420J2, or SUS304.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X250STC
- ✓ 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 SI32X250STC FAQ
Yes, the SI32X250STC is discontinued. The direct replacement is the SAI32X250STC. It is dimensionally interchangeable per ISO 15552, keeping the same 32 mm bore, 250 mm stroke, G1/8 port, and TC mounting interface.
This double-acting 32 mm bore cylinder has a G1/8 port. It delivers 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 max of 82 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X250STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X250STC replacement — usually within 7-8 hours.