This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X75SFTC, 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 SI63X75SFTC
The AirTAC Airtac SI63 Standard Cylinder SI63X75SFTC 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 SAI63X75SFTC, 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 → SAI63X75SFTC
- 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 SI63X75SFTC
The AirTAC SI63X75SFTC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 75mm stroke, and FTC trunnion mount. Delivering 1559 N push at 0.5 MPa, it is replaced by the direct replacement SAI63X75SFTC. This successor shares the exact G3/8 port, M16x1.5 rod thread, and 30mm cushions.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants absent in the SI line. The -S magnet pairs with legacy CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63X75SFTC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X75SFTC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X75SFTC |
| 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 SAI63X75SFTC 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 SAI63X75SFTC 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 SI63X75SFTC
| 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 SI63X75SFTC Is Used
Mid-Force Clamping
Secures heavy steel workpieces on machining fixtures using 1559 N of thrust at 0.5 MPa.
Package Diverting
Actuates diverter arms on sorting lines where a 75mm stroke and FTC mount provide precise routing.
Pallet Stopping
Deploys mechanical stops at transfer stations to halt pallets up to 79 kg safely.
Replacing the Airtac SI63 Standard Cylinder SI63X75SFTC with the SAI63X75SFTC
To replace the SI63X75SFTC, order the SAI63X75SFTC. Verify the ISO 15552 FTC trunnion interface, 63mm bore, 75mm stroke, G3/8 port, and the -S magnet. Sizing both ways: a 50mm bore yields 982 N push at 0.5 MPa, while an 80mm bore yields 2513 N. Note that a plain cylinder drifts on air loss; the cushions only decelerate. For load holding, specify an external pilot check valve or the SAIL/BSAI lock variant. The 75mm stroke avoids rod-bending side-load risks seen in longer units.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X75SFTC
- ✓ 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 SI63X75SFTC FAQ
Yes, the SI63X75SFTC is discontinued. The direct replacement is the SAI63X75SFTC. It shares the identical ISO 15552 mounting interface, 63mm bore, 75mm stroke, G3/8 port, and FTC trunnion, fitting existing fixtures perfectly.
This double-acting cylinder features a G3/8 air port and M16x1.5 rod thread. Force output is 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a maximum theoretical force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X75SFTC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X75SFTC replacement — usually within 7-8 hours.