This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X80FTC, 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 SI63X80FTC
The AirTAC Airtac SI63 Standard Cylinder SI63X80FTC 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 SAI63X80FTC, 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 → SAI63X80FTC
- 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 SI63X80FTC
The AirTAC SI63X80FTC is a discontinued double-acting ISO 15552 profile cylinder with an 80 mm stroke, delivering 1559 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI63X80FTC, a direct upgrade sharing the exact same FTC trunnion mounting, bore, and output force.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because this specific SKU lacks the -S magnet, it cannot accept a CS1-B or DS1-B sensor.
Airtac SI63 Standard Cylinder SI63X80FTC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X80FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X80FTC |
| 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 SAI63X80FTC 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 SAI63X80FTC 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 SI63X80FTC
| 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 SI63X80FTC Is Used
Trunnion-Mounted Clamping
Ideal for mid-stroke pivoting clamps on machining fixtures, using the FTC trunnion to swing the 1559 N push force securely into position.
Package Diverting
Provides robust actuation for diverting heavier product loads on packaging lines, utilizing the 80 mm stroke to push items cleanly across the belt.
Pallet Stop Gates
Deploys reliable stopping force for pallet handling systems, where the 63 mm bore easily absorbs impacts and halts moving loads on conveyors.
Replacing the Airtac SI63 Standard Cylinder SI63X80FTC with the SAI63X80FTC
To replace the SI63X80FTC, order the SAI63X80FTC and confirm the ISO 15552 FTC trunnion interface, 63 mm bore, 80 mm stroke, and G3/8 port. If you need more force, the neighboring 80 mm bore yields 2513 N push at 0.5 MPa; if less is required, the 50 mm bore provides 982 N. This non-magnet SKU cannot host a sensor, so if position detection is needed, specify the -S suffix on the SAI. Remember that a standard cylinder drifts on air loss—the cushion only decelerates near stroke end—so for load holding, consider an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X80FTC
- ✓ 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 SI63X80FTC FAQ
Yes, the SI63X80FTC is discontinued. The direct replacement is the SAI63X80FTC. It shares the identical ISO 15552 FTC trunnion mounting interface, 63 mm bore, 80 mm stroke, and G3/8 port, fitting directly into existing fixtures.
This 63 mm bore double-acting cylinder uses a G3/8 port and features a Ø20 mm piston rod. 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 of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X80FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X80FTC replacement — usually within 7-8 hours.