This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X68, 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 SI80X68
The AirTAC SI80 Standard Air Cylinder SI80X68 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 68mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X68, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke68 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X68
- 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 SI80X68
The AirTAC SI80X68 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm bore and 68 mm stroke. Delivering 2513 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI80X68. This direct successor matches the exact bore, stroke, force, port and ISO 15552 mounting interface. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life.
This specific SKU lacks the -S magnet, so it cannot accept CS1-B or DS1-B sensors. The plain cylinder does not hold load without live air; the 36 mm adjustable cushions only decelerate. For load holding, use an external rod lock, pilot check valve, or the SAI family's SAIL or BSAI lock variants. The SAI line also adds the SAIF self-valve option. Rod material options include carbon steel, SUS420J2 (A) or SUS304 (B), with Viton H seals for high temp.
Airtac SI80 Standard Air Cylinder SI80X68 Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X68 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X68 |
| Bore size | Ø80 mm |
| Stroke | 68 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 SAI80X68 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 SAI80X68 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 SI80X68
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×68 | 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 SI80X68 Is Used
Clamp Actuation
Drives robust fixturing clamps requiring high force, using its 2513 N push at 0.5 MPa to secure heavy workpieces during machining operations.
Product Diversion
Pushes heavy items across packaging lines, utilizing the 68 mm stroke to redirect goods reliably without overextending into the lane.
Pallet Stopping
Halts loaded pallets on rollers. The 80 mm bore handles kinetic energy, while adjustable cushions decelerate the load smoothly.
Replacing the Airtac SI80 Standard Air Cylinder SI80X68 with the SAI80X68
To replace the discontinued SI80X68, order the SAI80X68. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.) and the G3/8 port. Because this SKU lacks a magnet, it cannot take a sensor; if position detection is needed, select an SAI80X68S and use current AirTAC switches. For sizing down, a 63 mm bore yields 1559 N push at 0.5 MPa; for sizing up, a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss—the cushions only decelerate. For secure holding, specify the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X68
- ✓ 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 SI80X68 FAQ
Yes, the SI80X68 is discontinued. The direct replacement is the AirTAC SAI80X68. It shares the identical ISO 15552 mounting interface, 80 mm bore, 68 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The SI80X68 has a G3/8 port. 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 max force of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Request a Quote for the SAI80X68
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X68 replacement — usually within 7-8 hours.