This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX750, 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 SI63AX750
The AirTAC Airtac SI63 Standard Cylinder SI63AX750 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 750mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX750, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke750 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX750
- 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 SI63AX750
The AirTAC SI63AX750 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 750 mm stroke. Delivering 1559 N push force at 0.5 MPa, it features a SUS420J2 stainless piston rod (-A) and a G3/8 port. AirTAC replaced this EOL unit with the SAI63AX750, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, force and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Because this specific SKU lacks a magnet, it cannot accept position switches.
Airtac SI63 Standard Cylinder SI63AX750 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX750 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX750 |
| Bore size | Ø63 mm |
| Stroke | 750 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 SAI63AX750 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 SAI63AX750 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 SI63AX750
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×750 | 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 SI63AX750 Is Used
Long-Stroke Diversion
Pushes packages across a 750 mm transfer belt using the 1559 N thrust at 0.5 MPa, guided externally to prevent rod bending.
Stainless Rod Washdown
Actuates a washdown station fixture using the SUS420J2 rod option, resisting moisture while cycling at 30-800 mm/s.
Replacing the Airtac SI63 Standard Cylinder SI63AX750 with the SAI63AX750
To replace the SI63AX750, order the SAI63AX750 to retain the exact ISO 15552 interface, 63 mm bore, 750 mm stroke, G3/8 port and M16x1.5 rod thread. If you need load holding on air loss, note that a plain cylinder drifts when valve centered as the cushion only decelerates; use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. For self-contained valving, explore the SAIF variant. At 750 mm stroke, prevent rod bending by using an external guide to absorb side loads. If downsizing, a 50 mm bore gives 982 N push @0.5 MPa; if upsizing, an 80 mm bore provides 2513 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX750
- ✓ 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 SI63AX750 FAQ
Yes, the SI63AX750 is discontinued. The direct replacement is the SAI63AX750, which shares the identical ISO 15552 mounting interface, 63 mm bore, 750 mm stroke, output force and G3/8 port, fitting existing fixtures directly.
The 63 mm bore features a G3/8 port and delivers 1559 N push / 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical max of 318 kgf at 1.0 MPa. It uses an M16x1.5 rod thread and 30 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX750
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX750 replacement — usually within 7-8 hours.