This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX800, 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 SI63BX800
The AirTAC Airtac SI63 Standard Cylinder SI63BX800 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 800mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX800, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke800 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX800
- 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 SI63BX800
The AirTAC SI63BX800 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 800mm stroke. Delivering 1559N push force at 0.5MPa, it features a SUS304 stainless piston rod (-B) for corrosion resistance. The direct replacement is the SAI63BX800, matching the bore, stroke, 318kgf max force, G3/8 port, and ISO 15552 mounting interface.
The SAI upgrade utilizes two Y-shaped one-way piston seals for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63BX800 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX800 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX800 |
| Bore size | Ø63 mm |
| Stroke | 800 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 SAI63BX800 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 SAI63BX800 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 SI63BX800
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×800 | 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 SI63BX800 Is Used
Long-Stroke Diversion
Pushes packages across a 800mm transfer lane using the 1559N push force at 0.5 MPa, guided externally to prevent rod bending.
Corrosive Enviro Testing
Actuates test fixtures in humid chambers using the SUS304 stainless rod option, operating reliably between -20 and +70 C.
Replacing the Airtac SI63 Standard Cylinder SI63BX800 with the SAI63BX800
To replace the SI63BX800, order the SAI63BX800. Verify the ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. For this 800mm stroke, use external guides to prevent rod bending and side-load wear. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX800
- ✓ 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 SI63BX800 FAQ
Yes, the SI63BX800 is discontinued. The direct replacement is the SAI63BX800. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 800mm stroke, G3/8 port, and mounting fixtures.
The G3/8 port bore delivers 1559N push and 1402N pull at 0.5 MPa, 2182N push at 0.7 MPa, 2805N at 0.9 MPa, and a 318kgf max at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX800
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX800 replacement — usually within 7-8 hours.