This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X295S, 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 SI63X295S
The AirTAC Airtac SI63 Standard Cylinder SI63X295S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 295mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X295S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke295 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X295S
- 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 SI63X295S
The AirTAC SI63X295S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 295mm stroke. Delivering 1559N push force at 0.5MPa through a G3/8 port, it is directly replaced by the SAI63X295S. This direct upgrade shares the exact interface, bore, stroke, force, port and mounting, 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 extended life. The SI -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X295S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X295S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X295S |
| Bore size | Ø63 mm |
| Stroke | 295 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 SAI63X295S 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 SAI63X295S 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 SI63X295S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×295 | 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 SI63X295S Is Used
Pallet Diversion
Actuates lane diverters on packaging lines, using the 1559N thrust to push heavy pallets smoothly onto secondary tracks.
Press Tooling
Drives medium-duty stamping and forming heads, leveraging the 295mm stroke to clear upper dies during part ejection.
Replacing the Airtac SI63 Standard Cylinder SI63X295S with the SAI63X295S
To replace the SI63X295S, order the SAI63X295S direct. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), the 63mm bore, 295mm stroke, G3/8 port (PT/G/NPT thread), and the -S magnet. Sizing both ways: dropping to a 50mm bore yields 982N push at 0.5MPa, while stepping up to an 80mm bore provides 2513N. A plain cylinder drifts on air loss since the 30mm adjustable cushion only decelerates; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant. At 295mm stroke, ensure guide rails carry side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X295S
- ✓ 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 SI63X295S FAQ
Yes, the SI63X295S is discontinued. The direct replacement is the AirTAC SAI63X295S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 295mm stroke, output force, G3/8 port and mounting accessories.
The 63mm bore features a G3/8 air port and a 20mm rod. At 0.5MPa it provides 1559N push and 1402N pull force. At 0.7MPa push is 2182N, and at 0.9MPa it is 2805N. The theoretical maximum force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X295S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X295S replacement — usually within 7-8 hours.