This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX105S, 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 SI63BX105S
The AirTAC Airtac SI63 Standard Cylinder SI63BX105S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 105mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX105S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke105 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX105S
- 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 SI63BX105S
The AirTAC SI63BX105S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 105 mm stroke, and a SUS304 stainless steel rod. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63BX105S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock or valve variants the original SI lacked.
Airtac SI63 Standard Cylinder SI63BX105S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX105S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX105S |
| Bore size | Ø63 mm |
| Stroke | 105 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 SAI63BX105S 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 SAI63BX105S 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 SI63BX105S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×105 | 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 SI63BX105S Is Used
Transfer Line Diverters
Provides reliable 105 mm stroke actuation to push products between conveyor lanes, leveraging the 30-800 mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63BX105S with the SAI63BX105S
To replace the SI63BX105S, order the SAI63BX105S. Confirm the ISO 15552 mounting interface, the 63 mm bore, 105 mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -B rod specifies SUS304 stainless steel for corrosion resistance, and the -S suffix means a piston magnet is present for CS1-B/DS1-B switches. When sizing, a 50 mm bore offers 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 air cushion only decelerates near stroke end. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX105S
- ✓ 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 SI63BX105S FAQ
Yes, the SI63BX105S is discontinued. The direct replacement is the SAI63BX105S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 105 mm stroke, G3/8 port, and mounting interface, but features an upgraded piston seal.
This 63 mm bore cylinder has a G3/8 air port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX105S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX105S replacement — usually within 7-8 hours.