This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX140S, 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 SI63BX140S
The AirTAC Airtac SI63 Standard Cylinder SI63BX140S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 140mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX140S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX140S
- 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 SI63BX140S
The AirTAC SI63BX140S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 140mm stroke, and a SUS304 stainless steel rod. It delivers 1559N push and 1402N pull at 0.5MPa via a G3/8 port. The direct replacement is the SAI63BX140S, matching the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -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 SI63BX140S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX140S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX140S |
| Bore size | Ø63 mm |
| Stroke | 140 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 SAI63BX140S 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 SAI63BX140S 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 SI63BX140S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×140 | 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 SI63BX140S Is Used
Stainless Rod Diverters
Ideal for washdown conveyor routing where the SUS304 rod resists corrosion while pushing 1559N packages at 0.5MPa.
Mid-Force Pressing
Provides steady 2182N clamping force at 0.7MPa for light-duty component seating and pin insertion tasks.
Replacing the Airtac SI63 Standard Cylinder SI63BX140S with the SAI63BX140S
To replace the SI63BX140S, order the SAI63BX140S keeping the SUS304 rod, -S magnet, and ISO 15552 mounting interface. Confirm the G3/8 port and M16x1.5 thread. If sizing down, a 50mm bore yields 982N [email protected]; sizing up to 80mm provides 2513N. For load holding, note a plain cylinder drifts on air loss—the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. The Viton H seal option raises heat resistance to 150C.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX140S
- ✓ 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 SI63BX140S FAQ
Yes, the SI63BX140S is discontinued. The direct replacement is the SAI63BX140S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 140mm stroke, G3/8 port, and mounting interface.
This double-acting cylinder uses a G3/8 port. It delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N at 0.9MPa, and a maximum theoretical force of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX140S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX140S replacement — usually within 7-8 hours.