This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X240SN, 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 SI63X240SN
The AirTAC Airtac SI63 Standard Cylinder SI63X240SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 240mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X240SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X240SN
- 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 SI63X240SN
The AirTAC SI63X240SN is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 240mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa through a G3/8 port. The direct replacement is the SAI63X240SN, matching the interface, force and mounting.
The SAI upgrade uses two Y-shaped one-way piston seals for low start-up pressure and long life. This -SN variant has an NBR seal (-20 to +70C) and a magnet for CS1-B/DS1-B sensors. For load holding, use SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63X240SN Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X240SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X240SN |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAI63X240SN 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 SAI63X240SN 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 SI63X240SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SI63X240SN Is Used
Clamp Actuation
Provides 1559N of secure clamping force at 0.5MPa for mid-sized machining fixtures.
Product Diversion
Executes 240mm strokes to push heavy packages between parallel conveyor lines.
Pallet Lift Gate
Raises and lowers 79kg load gates smoothly using adjustable end cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X240SN with the SAI63X240SN
To replace the SI63X240SN, order the SAI63X240SN. Verify the ISO 15552 mounting interface, 63mm bore, 240mm stroke, G3/8 port (PT/G/NPT), and the -S magnet for current AirTAC switches. The 63mm bore yields 1559N push at 0.5MPa; step down to 50mm for 982N, or up to 80mm for 2513N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for holding. For integrated locks, explore the SAIL or BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X240SN
- ✓ 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 SI63X240SN FAQ
Yes, the SI63X240SN is discontinued. The direct replacement is the SAI63X240SN. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 240mm stroke, G3/8 port, and mounting accessories.
The 63mm bore uses a G3/8 port. At 0.5MPa it pushes 1559N and pulls 1402N. At 0.7MPa push is 2182N, and 2805N at 0.9MPa. The theoretical maximum force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X240SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X240SN replacement — usually within 7-8 hours.