This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X80, 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 SI63X80
The AirTAC Airtac SI63 Standard Cylinder SI63X80 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 80mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X80, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X80
- 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 SI63X80
The AirTAC SI63X80 is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke and a 63 mm bore. It delivers 1559 N push and 1402 N pull at 0.5 MPa, operating through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X80, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force and port size.
The SAI replacement features an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Because this specific SKU lacks the -S magnet, it cannot accept a position sensor. The SAI family also introduces SAIL, SAIF and BSAI lock variants absent from the SI line.
Airtac SI63 Standard Cylinder SI63X80 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X80 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X80 |
| Bore size | Ø63 mm |
| Stroke | 80 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 SAI63X80 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 SAI63X80 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 SI63X80
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×80 | 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 SI63X80 Is Used
Mid-Tonnage Clamping
Secures heavy workpieces during machining using the 1559 N push force at 0.5 MPa, fitting seamlessly into standard ISO 15552 fixture geometry.
Package Diversion
Actuates routing gates and pushers along material handling lines with an 80 mm stroke and a 30-800 mm/s speed range.
Pallet Stopper Arms
Deploys robust stop mechanisms for palletized goods, leveraging the 1402 N pull force to reliably retract the barrier.
Replacing the Airtac SI63 Standard Cylinder SI63X80 with the SAI63X80
To replace the discontinued SI63X80, order the SAI63X80. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 63 mm bore, the 80 mm stroke, and the G3/8 port with PT, G or NPT threads. Since this SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; order a magnet-equipped SAI if sensing is required. For loads, a plain cylinder drifts on air loss as the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for holding. If sizing up or down, neighbouring bores (50 mm or 80 mm) offer 982 N or 2513 N push at 0.5 MPa respectively.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X80
- ✓ 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 SI63X80 FAQ
Yes, the SI63X80 is discontinued. The direct replacement is the AirTAC SAI63X80. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 80 mm stroke, output force, G3/8 port and mounting accessories.
The bore uses a G3/8 port. Force output is 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa. The piston speed range is 30-800 mm/s.
Request a Quote for the SAI63X80
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X80 replacement — usually within 7-8 hours.