This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X650STC, 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 SI80X650STC
The AirTAC SI80 Standard Air Cylinder SI80X650STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X650STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X650STC
- 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 SI80X650STC
The AirTAC SI80X650STC is a discontinued double-acting ISO 15552 profile cylinder with a 650 mm stroke. It delivers 2513 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI80X650STC, matching the bore, stroke, force, and TC trunnion mount.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It retains the CS1-B/DS1-B legacy sensor compatibility via the -S magnet. For load holding, note that cushions only decelerate; use SAIL or BSAI lock variants.
Airtac SI80 Standard Air Cylinder SI80X650STC Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X650STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X650STC |
| Bore size | Ø80 mm |
| Stroke | 650 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 SAI80X650STC 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 SAI80X650STC 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 SI80X650STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×650 | 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 SI80X650STC Is Used
Pallet Diversion
Routes heavy pallets across packaging lines using the 650 mm stroke and 2513 N push force at 0.5 MPa.
Material Ejection
Pushes finished parts out of a press area, using adjustable end cushions to decelerate the 80 mm bore.
Replacing the Airtac SI80 Standard Air Cylinder SI80X650STC with the SAI80X650STC
To replace the SI80X650STC, order the SAI80X650STC. Confirm the ISO 15552 TC trunnion interface, 80 mm bore, 650 mm stroke, G3/8 port, and the -S magnet for CS1-B/DS1-B sensors. The SAI family adds SAIL, SAIF, and BSAI variants the SI lacked. If sizing down, the 63 mm bore yields 1559 N push at 0.5 MPa; sizing up to 100 mm provides 3927 N. A plain cylinder drifts without air; for held loads use an external rod lock or pilot check valve. At 650 mm, prevent rod bending by using an external guide to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X650STC
- ✓ 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 SI80X650STC FAQ
Yes, the SI80X650STC is discontinued. The direct replacement is the SAI80X650STC. It is dimensionally interchangeable per ISO 15552, keeping the same 80 mm bore, 650 mm stroke, G3/8 port, and TC trunnion mount.
This double-acting cylinder 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, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X650STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X650STC replacement — usually within 7-8 hours.