This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX240, 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 SI63AX240
The AirTAC Airtac SI63 Standard Cylinder SI63AX240 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 SAI63AX240, 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 → SAI63AX240
- 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 SI63AX240
The AirTAC SI63AX240 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, operating via a G3/8 port. AirTAC replaced this legacy unit with the SAI63AX240, a direct upgrade retaining the exact interface, force, and mounting dimensions.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. It also adds SAIL, SAIF, and BSAI lock variants the SI lacked. This specific SKU has no magnet (-S), so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63AX240 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX240 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX240 |
| 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 SAI63AX240 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 SAI63AX240 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 SI63AX240
| 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 SI63AX240 Is Used
Clamp Actuation
Provides 1559N of clamping force at 0.5MPa for securing heavy steel weldments during robotic welding operations.
Package Diverters
Drives 240mm stroke diverter arms on packaging lines, moving cartons between adjacent belt sections.
Pallet Stops
Acts as a pneumatic stop gate for loaded pallets, utilizing its 79kg vertical lift capacity for reliable blocking.
Replacing the Airtac SI63 Standard Cylinder SI63AX240 with the SAI63AX240
To replace the SI63AX240, order the SAI63AX240. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the 240mm stroke, and the G3/8 port. This SKU lacks a magnet, meaning no position sensing is possible; if switches are needed, select an SAI63X240S. The bore is fixed at 63mm; if sizing down, a 50mm bore yields 982N [email protected], while an 80mm bore provides 2513N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. At 240mm stroke, rod-bending side loads are moderate, but guiding long loads is advised.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX240
- ✓ 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 SI63AX240 FAQ
Yes, the SI63AX240 is discontinued. The direct replacement is the AirTAC SAI63AX240. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 240mm stroke, G3/8 port, and mounting fixtures.
The 63mm bore uses a G3/8 port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX240
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX240 replacement — usually within 7-8 hours.