This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X770S, 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 SI63X770S
The AirTAC Airtac SI63 Standard Cylinder SI63X770S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 770mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X770S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke770 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X770S
- 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 SI63X770S
The AirTAC SI63X770S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 770 mm stroke. Delivering 1559 N push force at 0.5 MPa, it features a G3/8 port, M16x1.5 rod thread, and a built-in magnet for CS1-B/DS1-B sensors. AirTAC replaced this legacy unit with the SAI63X770S.
The SAI63X770S is a direct replacement sharing the exact ISO 15552 mounting interface, output force, and porting. It upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X770S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X770S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X770S |
| Bore size | Ø63 mm |
| Stroke | 770 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 SAI63X770S 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 SAI63X770S 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 SI63X770S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×770 | 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 SI63X770S Is Used
Long-Stroke Diversion
Pushes packages across a 770 mm lane shift on a sorting conveyor, utilizing the 1559 N thrust at 0.5 MPa to overcome guide friction.
Pallet Stopper Gate
Acts as a pneumatic stop in a pallet flow line, absorbing impact via the 30 mm adjustable air cushions at both ends before halting the load.
Replacing the Airtac SI63 Standard Cylinder SI63X770S with the SAI63X770S
To replace the SI63X770S, order the SAI63X770S. Confirm the ISO 15552 mounting fixture, 63 mm bore, 770 mm stroke, G3/8 port (PT/G/NPT thread), and the -S magnet for position sensing. Sizing both ways: a 50 mm bore yields 982 N [email protected], while an 80 mm bore yields 2513 N. A plain cylinder drifts on air loss since cushions only decelerate; for load holding use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 770 mm, prevent rod bending by guiding the load externally to avoid side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X770S
- ✓ 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 SI63X770S FAQ
Yes, the SI63X770S is discontinued. The direct replacement is the AirTAC SAI63X770S. It shares the identical ISO 15552 mounting interface, 63 mm bore, 770 mm stroke, force, and G3/8 port, fitting existing fixtures perfectly while upgrading the piston seal.
The G3/8 port feeds a 20 mm rod. Force outputs are: 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 max of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X770S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X770S replacement — usually within 7-8 hours.