This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X650SFTC, 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 SI63X650SFTC
The AirTAC Airtac SI63 Standard Cylinder SI63X650SFTC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X650SFTC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X650SFTC
- 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 SI63X650SFTC
The AirTAC SI63X650SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 650 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X650SFTC, matching the exact bore, stroke, force, port and FTC trunnion mounting interface.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X650SFTC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X650SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X650SFTC |
| Bore size | Ø63 mm |
| Stroke | 650 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 SAI63X650SFTC 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 SAI63X650SFTC 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 SI63X650SFTC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×650 | 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 SI63X650SFTC Is Used
Long-Stroke Diversion
Pushes heavy pallets 650 mm laterally on packaging lines using the 1559 N thrust at 0.5 MPa.
Vertical Material Lift
Raises 79 kg fixtures through a 650 mm vertical span, relying on external guides to prevent rod bending.
Automated Press Ejection
Cycles press outputs out of the machine envelope using FTC trunnion mounting to handle pivot stresses.
Replacing the Airtac SI63 Standard Cylinder SI63X650SFTC with the SAI63X650SFTC
To replace the SI63X650SFTC, order the SAI63X650SFTC. Verify the ISO 15552 interface, 63 mm bore, 650 mm stroke, G3/8 port (PT/G/NPT threads), FTC trunnion mount and the -S magnet for CS1-B/DS1-B sensors. For sizing, a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. Because this is a 650 mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts without live air; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X650SFTC
- ✓ 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 SI63X650SFTC FAQ
Yes, the SI63X650SFTC is discontinued. The direct replacement is the SAI63X650SFTC. It is dimensionally interchangeable per ISO 15552, keeping the same 63 mm bore, 650 mm stroke, G3/8 port, FTC trunnion mount and 1559 N output force.
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 push is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X650SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X650SFTC replacement — usually within 7-8 hours.