This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X50SCB, 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 SI63X50SCB
The AirTAC SI63 Standard Cylinder SI63X50SCB 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 SAI63X50SCB, 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 → SAI63X50SCB
- 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 SI63X50SCB
The AirTAC SI63X50SCB is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 50mm stroke, CB clevis mount, and a magnetic piston for CS1-B/DS1-B switches. It delivers 1559N push and 1402N pull at 0.5MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X50SCB, a direct replacement retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding on air loss, the new SAI family adds SAIL and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X50SCB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X50SCB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X50SCB |
| 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 SAI63X50SCB 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 SAI63X50SCB 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 SI63X50SCB
| 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 SI63X50SCB Is Used
Clamp Actuation
Secures medium-duty workpieces in machining fixtures using the 1559N push force and 50mm stroke.
Package Diversion
Drives short-stroke routing gates on assembly lines, benefiting from the 30-800mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63X50SCB with the SAI63X50SCB
To replace the SI63X50SCB, order the SAI63X50SCB. Verify your ISO 15552 CB clevis mount, 63mm bore, 50mm stroke, G3/8 port, and the -S magnet for legacy CS1-B/DS1-B sensors. If you need more force, the 80mm bore yields 2513N push at 0.5MPa; if less is required, the 50mm bore provides 982N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants for held loads. Rod material options include carbon steel, SUS420J2, or SUS304.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X50SCB
- ✓ 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 SI63X50SCB FAQ
Yes, the SI63X50SCB is discontinued. The direct replacement is the AirTAC SAI63X50SCB. It shares the identical ISO 15552 mounting interface, 63mm bore, 50mm stroke, G3/8 port, and CB mount, fitting directly into existing fixtures.
The 63mm bore features a G3/8 port and M16x1.5 rod thread. It delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X50SCB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X50SCB replacement — usually within 7-8 hours.