This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X140, 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 SI63X140
The AirTAC Airtac SI63 Standard Cylinder SI63X140 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 SAI63X140, 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 → SAI63X140
- 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 SI63X140
The AirTAC SI63X140 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 140 mm stroke, delivering 1559 N push force at 0.5 MPa. AirTAC replaced it with the SAI63X140, a direct upgrade retaining the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread.
The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU lacks a magnet, so it cannot take a sensor. For load holding, the cushion only decelerates; use SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63X140 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X140 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X140 |
| 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 SAI63X140 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 SAI63X140 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 SI63X140
| 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 SI63X140 Is Used
Clamp Actuators
Provides reliable 1559 N clamping force for mid-sized machining fixtures.
Package Diverters
Drives medium-duty pusher arms on sorting lines with a 140 mm stroke.
Material Stops
Acts as a robust pneumatic stop gate for pallets up to 79 kg vertical lift.
Replacing the Airtac SI63 Standard Cylinder SI63X140 with the SAI63X140
To replace the SI63X140, order the SAI63X140. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.) and the G3/8 port. Because this SKU has no -S magnet, it cannot accept CS1-B/DS1-B switches; order a magnet-equipped SAI if sensing is needed. The 140 mm stroke is under 300 mm, so rod bending is minimal. For sizing, a 50 mm bore gives 982 N push @0.5 MPa, while an 80 mm bore gives 2513 N. If you need to hold a load without live air, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X140
- ✓ 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 SI63X140 FAQ
Yes, the AirTAC SI63X140 is discontinued. The direct replacement is the SAI63X140. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 140 mm stroke, output force, G3/8 port, and mounting interface.
The 63 mm bore uses a G3/8 air port. At 0.5 MPa it pushes 1559 N and pulls 1402 N. At 0.7 MPa it pushes 2182 N, and the theoretical maximum force is 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X140
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X140 replacement — usually within 7-8 hours.