This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X810STC, 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 SI63X810STC
The AirTAC Airtac SI63 Standard Cylinder SI63X810STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 810mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X810STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke810 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X810STC
- 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 SI63X810STC
The AirTAC SI63X810STC is a discontinued double-acting ISO 15552 profile cylinder with an 810 mm stroke, delivering 1559 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI63X810STC. This direct upgrade shares the exact ISO 15552 mounting interface, bore, stroke, and force, fitting your existing TC trunnion 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 SAI family also introduces SAIL, SAIF, and BSAI lock variants absent in the SI line, and the built-in magnet works with legacy CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X810STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X810STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X810STC |
| Bore size | Ø63 mm |
| Stroke | 810 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 SAI63X810STC 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 SAI63X810STC 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 SI63X810STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×810 | 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 SI63X810STC Is Used
Long-Stroke Diversion
Pushes heavy pallets sideways on a transfer line using the full 810 mm travel, relying on external guides to absorb side loads.
Vertical Material Lift
Raises a 79 kg load through a 810 mm elevation cycle, taking advantage of the 1559 N push force at 0.5 MPa.
Large Press Ejection
Ejects molded parts from a deep press bed, using adjustable end cushions to decelerate the 63 mm bore safely.
Replacing the Airtac SI63 Standard Cylinder SI63X810STC with the SAI63X810STC
To replace the SI63X810STC, order the SAI63X810STC. Verify your ISO 15552 TC trunnion mounting, 63 mm bore, 810 mm stroke, G3/8 port, and the -S magnet for CS1-B/DS1-B switches. If you need more force, the neighbouring 80 mm bore offers 2513 N push at 0.5 MPa; if less is required, the 50 mm bore provides 982 N. Because this is a long 810 mm stroke, use an external guide to prevent rod bending and side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X810STC
- ✓ 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 SI63X810STC FAQ
Yes, the SI63X810STC is discontinued. The direct replacement is the SAI63X810STC. It shares the same ISO 15552 mounting interface, 63 mm bore, 810 mm stroke, G3/8 port, and output force, dropping directly into existing TC trunnion fixtures.
The 63 mm bore uses a G3/8 port. It generates 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 force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X810STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X810STC replacement — usually within 7-8 hours.