This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X90SFTC, 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 SI63X90SFTC
The AirTAC Airtac SI63 Standard Cylinder SI63X90SFTC 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 SAI63X90SFTC, 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 → SAI63X90SFTC
- 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 SI63X90SFTC
The AirTAC SI63X90SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 90mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced this unit with the SAI63X90SFTC, a direct sharing the exact interface, M16x1.5 rod thread, and FTC trunnion mount.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants the SI lacked. The -S magnet supports CS1-B/DS1-B sensors, while a Viton H seal option raises heat resistance to 150C.
Airtac SI63 Standard Cylinder SI63X90SFTC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X90SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X90SFTC |
| 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 SAI63X90SFTC 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 SAI63X90SFTC 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 SI63X90SFTC
| 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 SI63X90SFTC Is Used
Package Diversion
Drives 90mm routing gates on assembly lines, benefiting from the 30-800mm/s speed range.
Pallet Stops
Acts as a robust 63mm bore stopper for medium-weight pallets in material handling systems.
Replacing the Airtac SI63 Standard Cylinder SI63X90SFTC with the SAI63X90SFTC
To replace the SI63X90SFTC, order the SAI63X90SFTC. Verify the ISO 15552 mounting dimensions, 63mm bore, 90mm stroke, G3/8 port, and FTC trunnion accessory. The -S magnet allows CS1-B/DS1-B switches, though the SAI uses current AirTAC sensors. For sizing, a 50mm bore offers 982N push at 0.5MPa, while an 80mm bore provides 2513N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X90SFTC
- ✓ 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 SI63X90SFTC FAQ
Yes, the SI63X90SFTC is discontinued. The direct replacement is the SAI63X90SFTC. It shares the exact ISO 15552 mounting interface, 63mm bore, 90mm stroke, G3/8 port, and FTC trunnion mount.
The 63mm bore features a G3/8 port. It delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a maximum theoretical force of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X90SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X90SFTC replacement — usually within 7-8 hours.