This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X140CA, 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 SI63X140CA
The AirTAC Airtac SI63 Standard Cylinder SI63X140CA 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 SAI63X140CA, 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 → SAI63X140CA
- 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 SI63X140CA
The AirTAC SI63X140CA is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 140 mm stroke, and CA clevis mounting. Delivering 1559 N push force at 0.5 MPa through a G3/8 port, it is replaced by the direct replacement SAI63X140CA. This current-production SAI model shares the exact ISO 15552 mounting interface, bore, stroke, output force, and port size, fitting existing fixtures perfectly.
The SAI upgrade features a revised piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the legacy line.
Airtac SI63 Standard Cylinder SI63X140CA Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X140CA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X140CA |
| 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 SAI63X140CA 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 SAI63X140CA 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 SI63X140CA
| 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 SI63X140CA Is Used
Clamp Actuation
Secures workpieces on machining fixtures using the 1559 N push force, with the CA clevis accommodating articulated swing motions.
Package Diversion
Drives sorting pop-up arms at 140 mm stroke to redirect items on packaging lines, operating reliably at 30-800 mm/s.
Replacing the Airtac SI63 Standard Cylinder SI63X140CA with the SAI63X140CA
To replace the SI63X140CA, order the SAI63X140CA. Verify the ISO 15552 CA clevis mounting, 63 mm bore, 140 mm stroke, G3/8 port, and M16x1.5 rod thread. Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, select an SAI equivalent with the magnet option and use current AirTAC sensors. When sizing, a neighboring 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates near stroke end—so for load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X140CA
- ✓ 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 SI63X140CA FAQ
Yes, the AirTAC SI63X140CA is discontinued. The direct replacement is the SAI63X140CA. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 140 mm stroke, CA clevis mount, and G3/8 port.
This double-acting cylinder uses a G3/8 air port. At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X140CA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X140CA replacement — usually within 7-8 hours.