This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X75SFA, 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 SI63X75SFA
The AirTAC Airtac SI63 Standard Cylinder SI63X75SFA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X75SFA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X75SFA
- 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 SI63X75SFA
The AirTAC SI63X75SFA is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 75mm stroke, and FA flange mounting. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI63X75SFA. This direct successor shares the exact ISO 15552 mounting interface, bore, and output force, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock and BSAI clamp-lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X75SFA Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X75SFA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X75SFA |
| Bore size | Ø63 mm |
| Stroke | 75 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 SAI63X75SFA 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 SAI63X75SFA 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 SI63X75SFA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×75 | 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 SI63X75SFA Is Used
Clamping Fixtures
Secures mid-weight machined parts during milling, utilizing the 1559 N push force to hold components firmly against cutting vibrations.
Package Diversion
Actuates 75mm stroke routing gates on assembly lines, providing rapid 30-800 mm/s sorting transitions for medium product payloads.
Pallet Stops
Deploys as a pneumatic stop mechanism for loaded pallets, using the FA flange to absorb repeated kinetic impacts safely.
Replacing the Airtac SI63 Standard Cylinder SI63X75SFA with the SAI63X75SFA
To replace the SI63X75SFA, order the SAI63X75SFA. Verify the ISO 15552 FA flange interface, 63mm bore, 75mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. If you need more force, the 80mm bore yields 2513 N push at 0.5 MPa; if less is required, the 50mm bore provides 982 N. Note that a plain cylinder drifts on air loss, as the cushion only decelerates; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X75SFA
- ✓ 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 SI63X75SFA FAQ
Yes, the AirTAC SI63X75SFA is discontinued. The direct replacement is the SAI63X75SFA. It shares the same ISO 15552 mounting interface, 63mm bore, 75mm stroke, output force, and G3/8 port, fitting directly into your existing FA flange fixtures.
The 63mm bore features a G3/8 air port and a 20mm rod. At 0.5 MPa it provides 1559 N push and 1402 N pull force. 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 SAI63X75SFA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X75SFA replacement — usually within 7-8 hours.