This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX500, 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 SI63AX500
The AirTAC Airtac SI63 Standard Cylinder SI63AX500 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 500mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX500, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke500 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX500
- 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 SI63AX500
The AirTAC SI63AX500 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 500 mm stroke, and a SUS420J2 stainless steel piston rod. Delivering 1559 N push force at 0.5 MPa, it is replaced by the SAI63AX500. This direct successor matches the exact bore, stroke, G3/8 port, and mounting interface, dropping straight into existing fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot take a sensor.
Airtac SI63 Standard Cylinder SI63AX500 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX500 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX500 |
| Bore size | Ø63 mm |
| Stroke | 500 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 SAI63AX500 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 SAI63AX500 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 SI63AX500
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×500 | 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 SI63AX500 Is Used
Long-Stroke Ejection
Uses the 500 mm stroke to push finished parts completely out of a machining center, relying on the 1559 N push force at 0.5 MPa to clear heavy metal chips.
Pallet Diversion
Actuates a diverter arm on a packaging line, where the 63 mm bore provides sufficient force to redirect loaded pallets without stalling.
Replacing the Airtac SI63 Standard Cylinder SI63AX500 with the SAI63AX500
To replace the SI63AX500, order the SAI63AX500. Verify the ISO 15552 interface, 63 mm bore, 500 mm stroke, G3/8 port, and SUS420J2 rod. Sizing both ways: a 50 mm bore yields 982 N [email protected], while an 80 mm bore yields 2513 N. For the 500 mm stroke, use external guides to prevent rod bending and side-load wear. This plain cylinder drifts on air loss; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. The SAI family also adds the SAIF valve variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX500
- ✓ 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 SI63AX500 FAQ
Yes, the SI63AX500 is discontinued. The direct replacement is the SAI63AX500. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 500 mm stroke, G3/8 port, and mounting interface.
The bore features a G3/8 air port. Force output is 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX500
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX500 replacement — usually within 7-8 hours.