This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X630S, 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 SI80X630S
The AirTAC SI80 Standard Air Cylinder SI80X630S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 630mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X630S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke630 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X630S
- 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 SI80X630S
The AirTAC SI80X630S is a discontinued double-acting ISO 15552 profile cylinder with a 630 mm stroke and a G3/8 port. Delivering 2513 N push force at 0.5 MPa, it is directly replaced by the current-production SAI80X630S. This direct upgrade matches the original bore, stroke, output force, port size and mounting interface, fitting existing fixtures perfectly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock, SAIF valve and BSAI clamp-lock variants.
Airtac SI80 Standard Air Cylinder SI80X630S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X630S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X630S |
| Bore size | Ø80 mm |
| Stroke | 630 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 SAI80X630S 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 SAI80X630S 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 SI80X630S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×630 | 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 SI80X630S Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces across conveyor stations using its 2513 N push force at 0.5 MPa over a 630 mm travel distance.
Large Fixture Actuation
Actuates heavy machining clamps or positioning arms where the 80 mm bore provides high thrust without requiring maximum system pressure.
Replacing the Airtac SI80 Standard Air Cylinder SI80X630S with the SAI80X630S
To replace the SI80X630S, order the SAI80X630S. Verify your ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the G3/8 port thread (PT, G or NPT) and the -S magnet for current AirTAC switches. Sizing both ways: a neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while a 100 mm bore yields 3927 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. Because the 630 mm stroke is long, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X630S
- ✓ 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 SI80X630S FAQ
Yes, the SI80X630S is discontinued. The direct replacement is the SAI80X630S. It is dimensionally interchangeable per ISO 15552, retaining the same 80 mm bore, 630 mm stroke, G3/8 port, output force and mounting interface.
The 80 mm bore features a G3/8 air port and a 25 mm piston rod. It delivers 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and a theoretical maximum force of 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X630S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X630S replacement — usually within 7-8 hours.