This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX700S, 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 SI63BX700S
The AirTAC Airtac SI63 Standard Cylinder SI63BX700S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 700mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX700S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke700 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX700S
- 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 SI63BX700S
The AirTAC SI63BX700S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 700 mm stroke, and SUS304 stainless steel rod. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63BX700S, matching the interface, stroke, and force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The original -S magnet supports CS1-B/DS1-B sensors, while the SAI uses current AirTAC switches.
Airtac SI63 Standard Cylinder SI63BX700S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX700S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX700S |
| Bore size | Ø63 mm |
| Stroke | 700 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 SAI63BX700S 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 SAI63BX700S 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 SI63BX700S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×700 | 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 SI63BX700S Is Used
Vertical Press Lowering
Lowers a 79 kg platen assembly using the 63 mm bore at 0.5 MPa, relying on adjustable cushions to decelerate at the stroke end.
Pallet Handling Gate
Actuates a heavy lifting gate over a 700 mm travel distance, requiring external guides to prevent rod bending under side loads.
Replacing the Airtac SI63 Standard Cylinder SI63BX700S with the SAI63BX700S
To replace the SI63BX700S, order the SAI63BX700S. Verify the ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread, and the -S magnet for current AirTAC switches. Sizing checks: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. This plain cylinder does not hold load on air loss; the 30 mm cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. For the 700 mm stroke, use external guides to prevent rod bending and side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX700S
- ✓ 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 SI63BX700S FAQ
Yes, the SI63BX700S is discontinued. The direct replacement is the SAI63BX700S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 700 mm stroke, G3/8 port, and mounting interface.
The 63 mm bore uses a G3/8 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 of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX700S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX700S replacement — usually within 7-8 hours.