This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1200STC, 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 SI63X1200STC
The AirTAC Airtac SI63 Standard Cylinder SI63X1200STC 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 SAI63X1200STC, 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 → SAI63X1200STC
- 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 SI63X1200STC
The AirTAC SI63X1200STC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 1200mm stroke, TC trunnion mount, and a piston magnet. Delivering 1559 N push force at 0.5 MPa, it is replaced by the SAI63X1200STC. This direct SAI upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and stroke, but introduces an upgraded piston seal featuring two Y-shaped one-way elements for low start-up pressure and extended life.
The SAI family also adds SAIL, SAIF, and BSAI lock variants absent in the legacy line. Your existing CS1-B/DS1-B sensors fit the SI magnet, while the SAI replacement uses current AirTAC switches.
Airtac SI63 Standard Cylinder SI63X1200STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1200STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1200STC |
| 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 SAI63X1200STC 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 SAI63X1200STC 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 SI63X1200STC
| 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 SI63X1200STC Is Used
Long-Stroke Material Transfer
Extends 1200mm to push heavy pallets between conveyor lines, utilizing the 1559 N push force to overcome friction and inertia during transitions.
High-Bay Pusher Arm
Acts as a reach arm in automated storage systems, moving totes deep into racking. The TC trunnion handles the pivot stress of the long extension.
Large Part Indexing
Shifts heavy castings or subassemblies down a machining line, relying on the 79 kg vertical lift capacity to safely manipulate components.
Replacing the Airtac SI63 Standard Cylinder SI63X1200STC with the SAI63X1200STC
To replace the SI63X1200STC, order the SAI63X1200STC. Verify your ISO 15552 TC trunnion mounting interface, 63mm bore, 1200mm stroke, G3/8 port, and the -S magnet requirement. The SAI drops into existing fixtures without changes. If sizing alternatives, neighbouring bores (50mm or 80mm) offer different force classes; this 63mm bore yields 1559 N push at 0.5 MPa. Because this is a 1200mm stroke, external guides are strongly recommended to prevent rod bending and side-load damage. A plain SAI does not hold load on air loss—the cushion only decelerates. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1200STC
- ✓ 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 SI63X1200STC FAQ
Yes, the SI63X1200STC is discontinued. The direct replacement is the SAI63X1200STC. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 1200mm stroke, G3/8 port, and TC mount exactly.
The 63mm bore features a G3/8 air port, a 20mm rod, and M16x1.5 thread. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1200STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1200STC replacement — usually within 7-8 hours.