This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX190S, 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 SI63AX190S
The AirTAC Airtac SI63 Standard Cylinder SI63AX190S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 190mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX190S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke190 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX190S
- 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 SI63AX190S
The AirTAC SI63AX190S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 190mm stroke, and a SUS420J2 stainless piston rod. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63AX190S, a direct sharing the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. It also introduces SAIL, SAIF, and BSAI variants absent from the SI line. The built-in magnet supports CS1-B/DS1-B switches, while the SAI uses current AirTAC sensors.
Airtac SI63 Standard Cylinder SI63AX190S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX190S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX190S |
| Bore size | Ø63 mm |
| Stroke | 190 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 SAI63AX190S 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 SAI63AX190S 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 SI63AX190S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×190 | 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 SI63AX190S Is Used
Stainless Rod Actuation
Drives clamping arms in packaging machinery where the SUS420J2 rod resists washdown moisture and provides 1559 N of push force.
Mid-Stroke Diverting
Actuates a 190mm diverting gate on material handling lines, using the G3/8 port for rapid 30-800 mm/s cycling.
Replacing the Airtac SI63 Standard Cylinder SI63AX190S with the SAI63AX190S
To replace the SI63AX190S, order the SAI63AX190S. Confirm the ISO 15552 mounting interface, the 190mm stroke, the G3/8 port, and the SUS420J2 stainless rod (-A). Retain the -S magnet for position sensing, noting the SAI uses current AirTAC switches instead of the legacy CS1-B/DS1-B. For sizing, the 63mm bore yields 1559 N push at 0.5 MPa; dropping to a 50mm bore gives 982 N, while an 80mm bore provides 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 190mm stroke, rod bending is minimal, but ensure rigid guidance for heavy loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX190S
- ✓ 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 SI63AX190S FAQ
Yes, the SI63AX190S is discontinued. The direct replacement is the SAI63AX190S. It shares the identical ISO 15552 mounting interface, 63mm bore, 190mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/8 air 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 SAI63AX190S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX190S replacement — usually within 7-8 hours.