This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X310S, 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 SI80X310S
The AirTAC SI80 Standard Air Cylinder SI80X310S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 310mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X310S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke310 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X310S
- 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 SI80X310S
The AirTAC SI80X310S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel, a 310 mm stroke, and a G3/8 air port. Delivering 2513 N of push force at 0.5 MPa, it is replaced by the SAI80X310S. This direct upgrade shares the exact same ISO 15552 mounting interface, bore, stroke, output force, port size, and accessories, fitting existing fixtures perfectly.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SI80X310S includes a magnet for CS1-B/DS1-B switches, while the SAI family uses current AirTAC switches. For load holding, note that air cushions only decelerate; use the SAIL or BSAI lock variants for secure holding.
Airtac SI80 Standard Air Cylinder SI80X310S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X310S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X310S |
| Bore size | Ø80 mm |
| Stroke | 310 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 SAI80X310S 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 SAI80X310S 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 SI80X310S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×310 | 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 SI80X310S Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, using the 310 mm stroke to push standard pallets firmly onto parallel conveyors.
Vertical Lift Gate
Raises and lowers mezzanine safety gates, where the 80 mm bore provides the robust push force needed to counteract heavy counterweights.
Press Ejection
Ejects formed metal parts from hydraulic presses, relying on adjustable end cushions to decelerate the 310 mm travel smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X310S with the SAI80X310S
To replace the SI80X310S, order the SAI80X310S. Verify the ISO 15552 mounting interface, 80 mm bore, 310 mm stroke, G3/8 port (PT/G/NPT thread options), and the -S magnet for position sensing. If you need more force, the neighboring 100 mm bore yields 3927 N push at 0.5 MPa; for less, the 63 mm bore yields 1559 N. Because the 310 mm stroke exceeds 300 mm, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—cushions only decelerate—so specify the SAIL or BSAI lock variant, or an external pilot check valve, if the load must be held.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X310S
- ✓ 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 SI80X310S FAQ
Yes, the SI80X310S is discontinued. The direct replacement is the SAI80X310S. It shares the same ISO 15552 mounting interface, 80 mm bore, 310 mm stroke, output force, and G3/8 port, fitting directly into your existing fixtures.
The 80 mm bore features a G3/8 air port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a maximum theoretical force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X310S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X310S replacement — usually within 7-8 hours.