This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X90FTC, 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 SI63X90FTC
The AirTAC Airtac SI63 Standard Cylinder SI63X90FTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 90mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X90FTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke90 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X90FTC
- 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 SI63X90FTC
The AirTAC SI63X90FTC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 90 mm stroke, and FTC trunnion mount. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI63X90FTC. This direct successor matches the exact interface, bore, stroke, force, and mounting hardware.
The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X90FTC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X90FTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X90FTC |
| Bore size | Ø63 mm |
| Stroke | 90 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 SAI63X90FTC 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 SAI63X90FTC 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 SI63X90FTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×90 | 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 SI63X90FTC Is Used
Conveyor Diverter
Pushes packages at 90 mm stroke with 1559 N force, easily handling mid-weight routing on packaging lines.
Clamp Actuation
Secures workpieces during machining using the FTC trunnion mount to absorb complex mid-stroke moments.
Replacing the Airtac SI63 Standard Cylinder SI63X90FTC with the SAI63X90FTC
To replace the SI63X90FTC, order the SAI63X90FTC. Verify the ISO 15552 FTC trunnion mount, 63 mm bore, 90 mm stroke, and G3/8 port. Because this variant has no magnet, you cannot mount position sensors; if sensing is required, select an SAI63X90FTCS. If sizing up or down, neighbouring bores (50 mm or 80 mm) offer 982 N or 2513 N push at 0.5 MPa. Remember, a standard cylinder drifts without live air—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X90FTC
- ✓ 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 SI63X90FTC FAQ
Yes, the SI63X90FTC is discontinued. The direct replacement is the SAI63X90FTC. It is dimensionally interchangeable per ISO 15552, keeping the same 63 mm bore, 90 mm stroke, G3/8 port, and FTC trunnion mount.
The 63 mm bore uses a G3/8 port. At 0.5 MPa it provides 1559 N push and 1402 N pull. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X90FTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X90FTC replacement — usually within 7-8 hours.