This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X300FTC, 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 SI63X300FTC
The AirTAC Airtac SI63 Standard Cylinder SI63X300FTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X300FTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X300FTC
- 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 SI63X300FTC
The AirTAC SI63X300FTC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 300mm stroke. Delivering 1559N push force at 0.5MPa via a G3/8 port, it is directly replaced by the SAI63X300FTC. This direct SAI upgrade retains the exact ISO 15552 mounting interface, FTC trunnion, and output force, fitting existing fixtures seamlessly.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also introduces SAIL, SAIF, and BSAI lock variants absent from the SI line. As this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63X300FTC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X300FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X300FTC |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAI63X300FTC 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 SAI63X300FTC 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 SI63X300FTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SI63X300FTC Is Used
Pallet Diversion
Actuates diverter arms on packaging lines, using the 300mm stroke to push heavy pallets onto parallel conveyors with reliable 1559N force.
Material Press
Provides consistent downward clamping pressure for assembly fixtures, utilizing the adjustable 30mm air cushions to decelerate the load smoothly.
Carton Stacking
Drives vertical lifting platforms in automated storage systems, handling loads safely within the 79kg vertical lift margin at 0.5MPa.
Replacing the Airtac SI63 Standard Cylinder SI63X300FTC with the SAI63X300FTC
To replace the SI63X300FTC, order the SAI63X300FTC, confirming the ISO 15552 FTC trunnion mount, 63mm bore, 300mm stroke, and G3/8 port. Because this SKU has no -S magnet, it cannot support position sensing; order a magnet-equipped SAI if switches are needed. When sizing, the 63mm bore yields 1559N push at 0.5MPa; dropping to a 50mm bore gives 982N, while an 80mm bore provides 2513N. For the 300mm stroke, use external guides to prevent rod bending and side-load wear. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify an external pilot check valve, or select the SAIL or BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X300FTC
- ✓ 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 SI63X300FTC FAQ
Yes, the AirTAC SI63X300FTC is discontinued. The direct replacement is the SAI63X300FTC. It shares the identical ISO 15552 mounting interface, 63mm bore, 300mm stroke, G3/8 port, and output force, fitting existing fixtures without modification.
This double-acting cylinder features a G3/8 air port and an M16x1.5 rod thread. 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 SAI63X300FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X300FTC replacement — usually within 7-8 hours.