This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX950S, 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 SI63BX950S
The AirTAC Airtac SI63 Standard Cylinder SI63BX950S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 950mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX950S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX950S
- 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 SI63BX950S
The AirTAC SI63BX950S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 950 mm stroke. It features a SUS304 stainless steel rod (-B) and a piston magnet (-S) for legacy CS1-B/DS1-B sensors. Generating 1559 N push force at 0.5 MPa via its G3/8 port, its direct replacement is the SAI63BX950S, which retains the exact same mounting interface, force, and stroke.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. Note that plain cylinders drift without live air; for load holding, explore the SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63BX950S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX950S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX950S |
| Bore size | Ø63 mm |
| Stroke | 950 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 SAI63BX950S 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 SAI63BX950S 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 SI63BX950S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×950 | 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 SI63BX950S Is Used
Long-Stroke Diversion
Pushes packages across transfer lines using the 950 mm stroke, relying on external guides to prevent rod bending during the extended travel.
Corrosive Fluid Handling
Actuates dampers in humid or washdown environments utilizing the SUS304 stainless rod option for enhanced corrosion resistance.
Replacing the Airtac SI63 Standard Cylinder SI63BX950S with the SAI63BX950S
To replace the discontinued SI63BX950S, order the SAI63BX950S. Verify your ISO 15552 mounting fixture (LB, FA, CA, TC, etc.), the G3/8 port thread, and the M16x1.5 rod-end thread. The -S magnet enables current AirTAC switches (replacing legacy CS1-B/DS1-B), while the -B SUS304 rod resists corrosion. At 0.5 MPa it pushes 1559 N and pulls 1402 N; if undersized, the 80 mm bore yields 2513 N. At 950 mm, prevent rod bending by adding external guides to absorb side loads. For dead-load holding, select the SAIL air-released lock or BSAI clamp-lock, as standard cushions only decelerate.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX950S
- ✓ 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 SI63BX950S FAQ
Yes, the SI63BX950S is discontinued. The direct replacement is the SAI63BX950S. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 950 mm stroke, G3/8 port, and mounting interface.
The G3/8 port feeds a cylinder delivering 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa. It operates at 30-800 mm/s with a 30 mm adjustable cushion.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX950S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX950S replacement — usually within 7-8 hours.