This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX950, 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 SI63BX950
The AirTAC SI63 Standard Cylinder SI63BX950 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 SAI63BX950, 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 → SAI63BX950
- 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 SI63BX950
The AirTAC SI63BX950 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 950mm stroke. Featuring a SUS304 stainless piston rod, it delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63BX950, matching the interface, force, and mounting exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Without a -S suffix, this SKU cannot take a magnetic switch. The SAI family also adds SAIL, SAIF, and BSAI lock variants.
Airtac SI63 Standard Cylinder SI63BX950 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX950 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX950 |
| 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 SAI63BX950 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 SAI63BX950 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 SI63BX950
| 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 SI63BX950 Is Used
Long-Stroke Diversion
Drives large package pushers or sorting gates over 950mm travel where the 1559N thrust at 0.5MPa easily overcomes friction.
Stainless Material Handling
The SUS304 rod resists moisture in washdown logistics, while the 79kg vertical lift capacity handles heavy palletized goods.
Automated Assembly Lifts
Raises heavy jigs or platens in assembly cells; external guides are critical for this 950mm stroke to prevent rod bending.
Replacing the Airtac SI63 Standard Cylinder SI63BX950 with the SAI63BX950
To replace the SI63BX950, order the SAI63BX950, confirming the ISO 15552 interface, 63mm bore, 950mm stroke, G3/8 port, and SUS304 rod. Size both ways: neighboring bores offer 982N (50mm) or 2513N (80mm) push at 0.5MPa. For load holding, note that a plain cylinder drifts on air loss; the cushion only decelerates. Use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. With a 950mm stroke, use external guides to prevent rod bending and side loads. This non-magnet SKU cannot accept CS1-B/DS1-B sensors.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX950
- ✓ 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 SI63BX950 FAQ
Yes, the SI63BX950 is discontinued. The direct replacement is the SAI63BX950. It is dimensionally interchangeable per ISO 15552, keeping the same 63mm bore, 950mm stroke, G3/8 port, and mounting interface.
It features a G3/8 port and provides 1559N push / 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa. The SAI replacement adds an upgraded two Y-shaped element seal for low start-up pressure.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX950
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX950 replacement — usually within 7-8 hours.