This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X320, 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 SI63X320
The AirTAC Airtac SI63 Standard Cylinder SI63X320 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 320mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X320, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke320 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X320
- 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 SI63X320
The AirTAC SI63X320 is a discontinued double-acting ISO 15552 profile cylinder, delivering 1559 N push force at 0.5 MPa through a 63 mm bore and 320 mm stroke. The direct replacement is the SAI63X320, matching the G3/8 port, M16x1.5 rod thread and mounting interface exactly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This non-magnet SKU cannot take a sensor, though legacy SI -S versions used CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63X320 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X320 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X320 |
| Bore size | Ø63 mm |
| Stroke | 320 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 SAI63X320 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 SAI63X320 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 SI63X320
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×320 | 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 SI63X320 Is Used
Package Diversion
Actuates routing gates on 320 mm lanes to redirect mid-weight cartons utilizing 1559 N of push force at 0.5 MPa.
Pallet Positioning
Indexes empty pallets into a wrapping station, with the 320 mm stroke providing the required reach for loading.
Fixture Ejection
Pushes machined aluminum parts out of a fixture, relying on the 63 mm bore's 1402 N pull force for retraction.
Replacing the Airtac SI63 Standard Cylinder SI63X320 with the SAI63X320
To replace the SI63X320, order the SAI63X320 to retain the exact ISO 15552 mounting interface, 320 mm stroke and G3/8 port. Confirm your mounting accessory (LB, FA, TC, etc.) and thread type (PT, G, NPT). Because this is a non-S SKU, it cannot accept a magnetic sensor; if sensing is needed, specify an SAI63X320S. At 0.5 MPa the 63 mm bore yields 1559 N push and 1402 N pull; sizing down, a 50 mm bore gives 982 N push, while sizing up, an 80 mm bore provides 2513 N push. For the 320 mm stroke, use external guides to prevent rod bending and side-load damage. The air cushion only decelerates the piston; it does not hold load on air loss, so add an external rod lock, pilot check valve, or specify the SAIL or BSAI lock variant for suspended loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X320
- ✓ 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 SI63X320 FAQ
Yes, the AirTAC SI63X320 is discontinued. The direct replacement is the SAI63X320. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 320 mm stroke, output force, G3/8 port and mounting accessories.
The 63 mm bore features a G3/8 air port and M16x1.5 rod thread. 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.
Request a Quote for the SAI63X320
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X320 replacement — usually within 7-8 hours.