This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X260STC, 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 SI80X260STC
The AirTAC SI80 Standard Air Cylinder SI80X260STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 260mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X260STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke260 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X260STC
- 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 SI80X260STC
The AirTAC SI80X260STC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 260 mm stroke. It delivers 2513 N push and 2268 N pull at 0.5 MPa, utilizing a G3/8 port and M20x1.5 rod thread. AirTAC replaced this legacy unit with the SAI80X260STC, a direct replacement retaining the exact ISO 15552 TC trunnion mounting interface, bore, stroke, force, and port size.
The SAI upgrade features a refined piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original SI includes a piston magnet for CS1-B/DS1-B sensors, while the SAI family introduces lock and valve variants like SAIL and BSAI that the SI lacked.
Airtac SI80 Standard Air Cylinder SI80X260STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X260STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X260STC |
| Bore size | Ø80 mm |
| Stroke | 260 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 SAI80X260STC 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 SAI80X260STC 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 SI80X260STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×260 | 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 SI80X260STC Is Used
Pallet Diversion
Actuates heavy lane diverters on packaging lines, using the 2513 N push force to shift loaded pallets smoothly onto secondary conveyors.
Press Clamping
Secures steel workpieces in machining fixtures. The TC trunnion mount absorbs centerline stresses during high-cycle clamping operations.
Vertical Lift Gate
Raises and lowers 120 kg material handling gates. The 260 mm stroke provides ample travel while maintaining stable vertical actuation.
Replacing the Airtac SI80 Standard Air Cylinder SI80X260STC with the SAI80X260STC
To replace the SI80X260STC, order the SAI80X260STC. Confirm the ISO 15552 TC trunnion mounting, 80 mm bore, 260 mm stroke, G3/8 port, and the -S magnet for switch sensing. If you need more force, the neighboring 100 mm bore offers 3927 N push at 0.5 MPa; if less is acceptable, the 63 mm bore provides 1559 N. A plain cylinder drifts on air loss—the air cushion only decelerates near stroke end—so for load holding, specify an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant. At 260 mm stroke, verify side-load alignment to prevent rod bending, using a guide rail if necessary.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X260STC
- ✓ 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 SI80X260STC FAQ
Yes, the SI80X260STC is discontinued. The direct replacement is the SAI80X260STC. It matches the ISO 15552 mounting interface, 80 mm bore, 260 mm stroke, output force, G3/8 port, and TC trunnion hardware, fitting directly into existing fixtures.
The 80 mm bore features a G3/8 port and M20x1.5 rod thread. It delivers 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 force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X260STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X260STC replacement — usually within 7-8 hours.