This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X225STC, 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 SI80 Standard Air Cylinder SI80X225STC
The AirTAC SI80 Standard Air Cylinder SI80X225STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 225mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X225STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X225STC
- 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 SI80 Standard Air Cylinder SI80X225STC
The AirTAC SI80X225STC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore, 225 mm stroke, and a TC trunnion mount. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI80X225STC. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke, force, and port size for existing fixtures.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding, the SAI family introduces SAIL and BSAI clamp-lock variants absent in the SI line. The -S suffix indicates a piston magnet for legacy CS1-B/DS1-B sensors.
Airtac SI80 Standard Air Cylinder SI80X225STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X225STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X225STC |
| Bore size | Ø80 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| 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, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80X225STC carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAI80X225STC produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80X225STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×225 | 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 SI80 Standard Air Cylinder SI80X225STC Is Used
Mid-Tonnage Pressing
Applies 2513 N of push force at 0.5 MPa for seating bearings, stamping light sheet metal, or assembling heavy housings on automated lines.
Pallet Diverting
Uses the 225 mm stroke and TC trunnion mount to swing heavy pallets or redirect large product flows across material handling conveyors.
Replacing the Airtac SI80 Standard Air Cylinder SI80X225STC with the SAI80X225STC
To replace the SI80X225STC, order the SAI80X225STC. Verify your ISO 15552 TC trunnion mounting hardware, the 225 mm stroke, the G3/8 port, and the -S magnet requirement. The SAI80X225STC is dimensionally interchangeable per ISO 15552 and drops into the same fixtures. If sizing up or down, neighboring bores are 63 mm (1559 N push @0.5 MPa) and 100 mm (3927 N push @0.5 MPa). Because this stroke is 225 mm, ensure adequate guide support to prevent rod bending and side loads. A plain ISO 15552 cylinder does not hold load without live air; the 36 mm adjustable air cushions only decelerate near stroke end. For dead-load holding, use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants. The SAI family also offers the SAIF variant with a built-in 4M valve for bores 32-100. Rod material options include carbon steel, SUS420J2 (A), and SUS304 (B); seal options include NBR N and Viton H for high temperatures.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X225STC
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80X225STC FAQ
Yes, the SI80X225STC is discontinued. The direct replacement is the SAI80X225STC. It shares the identical ISO 15552 mounting interface, 80 mm bore, 225 mm stroke, output force, G3/8 port, and TC trunnion mount, fitting directly into existing fixtures.
The 80 mm bore uses a G3/8 port. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X225STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X225STC replacement — usually within 7-8 hours.