This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X650, 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 SI80X650
The AirTAC SI80 Standard Air Cylinder SI80X650 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 SAI80X650, 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 → SAI80X650
- 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 SI80X650
The AirTAC SI80X650 is a discontinued double-acting ISO 15552 profile cylinder featuring an 80 mm bore and 650 mm stroke. Generating 2513 N of push force at 0.5 MPa through its G3/8 port, it is replaced by the SAI80X650. This direct successor matches the exact bore, stroke, output force, port size and mounting interface.
The SAI upgrade introduces a refined piston seal with two Y-shaped one-way elements for lower start-up pressure and longer service life. Note this specific SKU lacks a magnet and cannot accept position sensors.
Airtac SI80 Standard Air Cylinder SI80X650 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X650 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X650 |
| 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 SAI80X650 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 SAI80X650 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 SI80X650
| 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 SI80X650 Is Used
Pallet Transfer
Provides the 2513 N push force needed to index heavy pallets along a conveyor line over a 650 mm travel distance.
Press Ejection
Ejects formed parts from large presses, utilizing the adjustable 36 mm air cushions to decelerate at stroke ends.
Replacing the Airtac SI80 Standard Air Cylinder SI80X650 with the SAI80X650
To replace the SI80X650, order the SAI80X650, ensuring a seamless ISO 15552 mounting interface transition. Confirm your port thread (PT, G, or NPT), the M20x1.5 rod-end connection, and your specific mounting accessory (LB, FA, TC, etc.). Because this non-magnetic SKU lacks a sensor groove piston ring, it cannot accept CS1-B or DS1-B switches; if sensing is required, select an SAI model with the -S magnet option. When sizing, consider neighbouring bores: a 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore provides 3927 N. For load holding on air loss, note that a standard cylinder drifts; the cushion only decelerates. Use an external pilot check valve, rod lock, or the SAIL/BSAI lock variants. Finally, for the 650 mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X650
- ✓ 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 SI80X650 FAQ
Yes, the SI80X650 is discontinued. The direct replacement is the AirTAC SAI80X650. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 650 mm stroke, G3/8 port, and mounting interface, so it fits existing fixtures directly.
The G3/8 port feeds a 25 mm piston rod to generate 2513 N push and 2268 N pull at 0.5 MPa. At 0.7 MPa push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Request a Quote for the SAI80X650
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X650 replacement — usually within 7-8 hours.