This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X50SH, 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 SI63X50SH
The AirTAC SI63 Standard Cylinder SI63X50SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X50SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X50SH
- 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 SI63X50SH
The AirTAC SI63X50SH is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 50mm stroke. Delivering 1559N push force at 0.5MPa via a G3/8 port, it is directly replaced by the SAI63X50SH. The SAI direct maintains identical ISO 15552 mounting, stroke, force, and port dimensions. The SAI features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The -H suffix indicates a Viton H seal, extending operating temperature to 0-150C. The -S denotes a piston magnet for legacy CS1-B/DS1-B sensors.
The SAI family also adds variants the SI lacked, including the SAIL air-released lock, SAIF integrated 4M valve, and BSAI clamp-lock. Note that a plain cylinder drifts on air loss; the cushion only decelerates, so use a lock variant or pilot check valve for load holding.
Airtac SI63 Standard Cylinder SI63X50SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X50SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X50SH |
| Bore size | Ø63 mm |
| Stroke | 50 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 SAI63X50SH 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 SAI63X50SH 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 SI63X50SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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 SI63X50SH Is Used
Clamp Actuation
Provides 1559N of clamping force at 0.5MPa for securing mid-weight workpieces during machining operations.
Short-Stroke Pressing
Ideal for 50mm pressing or seating tasks, delivering 2182N at 0.7MPa to firmly set components.
Diversion Gates
Drives heavy-duty routing flaps on conveyor lines, utilizing the G3/8 port for rapid 30-800mm/s cycling.
Replacing the Airtac SI63 Standard Cylinder SI63X50SH with the SAI63X50SH
To replace the discontinued SI63X50SH, order the SAI63X50SH. Confirm the ISO 15552 mounting interface (LB, FA, CA, TC, etc.), 50mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. The -H Viton H seal is required for 0-150C high-temperature environments. If downsizing, a 50mm bore offers 982N push at 0.5MPa; if upsizing, an 80mm bore yields 2513N. A plain SAI does not hold load without live air, so for vertical applications consider the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X50SH
- ✓ 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 SI63X50SH FAQ
Yes, the AirTAC SI63X50SH is discontinued. The direct replacement is the SAI63X50SH. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 50mm stroke, G3/8 port, and mounting interface.
The G3/8 port feeds a 20mm rod delivering 1559N push and 1402N pull at 0.5MPa. At 0.7MPa push is 2182N, and 2805N at 0.9MPa. The theoretical max force is 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X50SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X50SH replacement — usually within 7-8 hours.