This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X800LB, 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 SI63 Standard Cylinder SI63X800LB
The AirTAC Airtac SI63 Standard Cylinder SI63X800LB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 800mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X800LB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X800LB
- 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 SI63 Standard Cylinder SI63X800LB
The AirTAC SI63X800LB is a discontinued double-acting ISO 15552 profile cylinder with an LB foot mount. Built for a 63mm bore and 800mm stroke, it delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X800LB, matching the exact interface, force, and stroke.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a sensor. The SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X800LB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X800LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X800LB |
| Bore size | Ø63 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63X800LB carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAI63X800LB produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63X800LB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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 SI63 Standard Cylinder SI63X800LB Is Used
Long-Stroke Material Ejection
Pushes finished parts out of a machining center using the 1559N push force at 0.5MPa, requiring external guides to manage the 800mm stroke.
Pallet Positioning Stops
Acts as a heavy-duty stopper on a conveyor line, utilizing the LB foot mount to secure the cylinder against 1402N pull loads.
Replacing the Airtac SI63 Standard Cylinder SI63X800LB with the SAI63X800LB
To replace the SI63X800LB, order the SAI63X800LB. Confirm the ISO 15552 LB foot mount, 63mm bore, 800mm stroke, and G3/8 port (PT/G/NPT thread options). Because this 800mm stroke is long, use external guides to prevent rod bending and side-load wear. This non-magnet SKU cannot accept a CS1-B/DS1-B sensor. If you need more force, the 80mm bore yields 2513N at 0.5MPa; if less, the 50mm bore yields 982N. For load holding on air loss, note the air cushion only decelerates; add an external rod lock, pilot check valve, or use the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X800LB
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63X800LB FAQ
Yes, the SI63X800LB is discontinued. The direct replacement is the SAI63X800LB. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 800mm stroke, LB foot mount, G3/8 port, and 1559N output force.
The bore is 63mm with a G3/8 port. At 0.5MPa it provides 1559N push and 1402N pull force. At 0.7MPa push is 2182N, and at 0.9MPa it is 2805N. The theoretical maximum force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X800LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X800LB replacement — usually within 7-8 hours.