This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX1200S, 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 SI63BX1200S
The AirTAC Airtac SI63 Standard Cylinder SI63BX1200S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1200mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX1200S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1200 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX1200S
- 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 SI63BX1200S
The AirTAC SI63BX1200S is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless steel piston rod and a built-in magnet. Delivering 1559 N push force at 0.5 MPa through a G3/8 port, it is replaced by the SAI63BX1200S direct equivalent.
The SAI upgrade retains the exact ISO 15552 mounting interface and introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure. The legacy CS1-B/DS1-B sensors fit this SI model, while the SAI uses current AirTAC switches.
Airtac SI63 Standard Cylinder SI63BX1200S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX1200S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX1200S |
| Bore size | Ø63 mm |
| Stroke | 1200 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 SAI63BX1200S 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 SAI63BX1200S 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 SI63BX1200S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1200 | 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 SI63BX1200S Is Used
Long-Stroke Vertical Lift
Raises and lowers heavy platens over 1200 mm where the 1559 N push force at 0.5 MPa handles the payload, provided external guides support the rod.
Pallet Transfer Pusher
Pushes large pallets across wide roller conveyors, utilizing the G3/8 port and adjustable 30 mm air cushions to decelerate smoothly at stroke ends.
Corrosive Environment Actuation
Actuates testing equipment in humid or washdown settings using the SUS304 stainless piston rod, with CS1-B/DS1-B sensors tracking position.
Replacing the Airtac SI63 Standard Cylinder SI63BX1200S with the SAI63BX1200S
To replace the SI63BX1200S, order the SAI63BX1200S keeping the 63 mm bore, 1200 mm stroke, G3/8 port, and SUS304 rod. Verify your ISO 15552 mounting accessory (LB, FA, TC) and PT/G/NPT thread. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; if less force is needed, a 50 mm bore gives 982 N, or an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss; for load holding use an external pilot check valve or the SAIL/BSAI lock variant. At 1200 mm, use external guides to prevent rod bending and side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX1200S
- ✓ 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 SI63BX1200S FAQ
Yes, the SI63BX1200S is discontinued. The direct replacement is the SAI63BX1200S. It shares the same ISO 15552 mounting interface, 63 mm bore, 1200 mm stroke, G3/8 port, and output force, fitting existing fixtures directly.
The bore is 63 mm with a G3/8 air port. Force output is 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX1200S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX1200S replacement — usually within 7-8 hours.