This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X1650S, 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 SI80X1650S
The AirTAC SI80 Standard Air Cylinder SI80X1650S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 1650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X1650S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke1650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X1650S
- 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 SI80X1650S
The AirTAC SI80X1650S is a discontinued double-acting ISO 15552 profile cylinder with a 1650 mm stroke. It delivers 2513 N push force at 0.5 MPa through a G3/8 port. Because 1650 mm exceeds the 1500 mm standard maximum for this bore, this is a non-standard, made-to-order length. AirTAC replaced the SI line with the SAI family; your direct is the SAI80X1650S, matching the ISO 15552 mounting interface, bore, stroke, force and port.
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. This -S model has a piston magnet for CS1-B/DS1-B sensors; the SAI uses current AirTAC switches.
Airtac SI80 Standard Air Cylinder SI80X1650S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X1650S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X1650S |
| Bore size | Ø80 mm |
| Stroke | 1650 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 SAI80X1650S 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 SAI80X1650S 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 SI80X1650S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×1650 | 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 SI80X1650S Is Used
Long-Stroke Material Transfer
Pushes heavy pallets 1650 mm between conveyor lines using the 2513 N thrust at 0.5 MPa.
Large Press Feed
Feeds heavy sheet stock into a press over a 1650 mm span, requiring external guides to prevent rod bending.
Replacing the Airtac SI80 Standard Air Cylinder SI80X1650S with the SAI80X1650S
To replace the SI80X1650S, order the SAI80X1650S direct, confirming the ISO 15552 mounting interface, the 80 mm bore, the 1650 mm non-standard stroke, the G3/8 port, and the -S magnet. Size both ways: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. A plain cylinder drifts on air loss as the cushion only decelerates; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 1650 mm, prevent rod bending by using an external guide to handle side loads. The SAI family also offers the SAIF self-valve variant if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X1650S
- ✓ 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 SI80X1650S FAQ
Yes, the SI80X1650S is discontinued. The direct replacement is the SAI80X1650S, a current-production ISO 15552 cylinder with the same 80 mm bore, 1650 mm stroke, G3/8 port, force and mounting interface.
It has a G3/8 port and provides 2513 N push / 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical max of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X1650S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X1650S replacement — usually within 7-8 hours.