This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X600SFB, 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 SI63X600SFB
The AirTAC Airtac SI63 Standard Cylinder SI63X600SFB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 600mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X600SFB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke600 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X600SFB
- 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 SI63X600SFB
The AirTAC SI63X600SFB is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 600mm stroke. It delivers 1559N push at 0.5MPa through a G3/8 port. AirTAC replaced this EOL unit with the SAI63X600SFB, a direct sharing the same ISO 15552 mounting interface, M16x1.5 rod thread, and force ratings.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL and BSAI lock variants the SI lacked. Note that a 600mm stroke requires external guides to prevent rod bending under side loads.
Airtac SI63 Standard Cylinder SI63X600SFB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X600SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X600SFB |
| Bore size | Ø63 mm |
| Stroke | 600 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 SAI63X600SFB 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 SAI63X600SFB 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 SI63X600SFB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×600 | 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 SI63X600SFB Is Used
Long-Stroke Diversion
Pushes packages across a 600mm conveyor lane using the 1559N thrust class, requiring external guides to absorb side loads during transit.
Fixture Actuation
Clamps large workpieces on an FB flange mount, using the G3/8 port to maintain steady pressure throughout the 600mm travel.
Replacing the Airtac SI63 Standard Cylinder SI63X600SFB with the SAI63X600SFB
To replace the SI63X600SFB, order the SAI63X600SFB. It drops directly into existing FB flange mounts, matching the 63mm bore, 600mm stroke, G3/8 port, and ISO 15552 interface. Because this unit has the -S magnet, it supports legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). When sizing, note a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. For load holding on air loss, a plain cylinder drifts; the cushion only decelerates. Use an external pilot check valve or the SAIL lock variant. Finally, at 600mm stroke, use external guides to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X600SFB
- ✓ 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 SI63X600SFB FAQ
Yes, the SI63X600SFB is discontinued. The direct replacement is the SAI63X600SFB. It shares the identical ISO 15552 mounting interface, 63mm bore, 600mm stroke, FB flange mount, and G3/8 port, fitting existing fixtures perfectly.
The 63mm bore uses a G3/8 port. Force outputs are: 1559N push and 1402N pull at 0.5MPa; 2182N push at 0.7MPa; 2805N push at 0.9MPa; with a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X600SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X600SFB replacement — usually within 7-8 hours.