This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX150S, 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 SI63AX150S
The AirTAC Airtac SI63 Standard Cylinder SI63AX150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX150S
- 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 SI63AX150S
The AirTAC SI63AX150S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 150mm stroke, and a SUS420J2 stainless steel piston rod. Delivering 1559N push and 1402N pull at 0.5MPa, it is directly replaced by the SAI63AX150S. This direct successor shares the exact G3/8 port, M16x1.5 thread, and ISO 15552 mounting interface, dropping into existing fixtures without modification.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63AX150S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX150S |
| Bore size | Ø63 mm |
| Stroke | 150 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 SAI63AX150S 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 SAI63AX150S 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 SI63AX150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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 SI63AX150S Is Used
Stainless Rod Actuation
Ideal for packaging machinery requiring the SUS420J2 stainless piston rod to resist moisture and corrosion while delivering 1559N push force.
Mid-Stroke Diverting
Provides robust 150mm travel for diverting moderate loads on material handling lines, utilizing the adjustable 30mm air cushions for smooth stops.
Replacing the Airtac SI63 Standard Cylinder SI63AX150S with the SAI63AX150S
To replace the SI63AX150S, order the SAI63AX150S. Verify the ISO 15552 mounting interface, 150mm stroke, G3/8 port, and your -S magnet requirement for CS1-B/DS1-B switches. The -A rod specifies SUS420J2 stainless steel for corrosion resistance. Sizing both ways: a 50mm bore yields 982N [email protected], while an 80mm bore yields 2513N. For this 150mm stroke, ensure adequate guide support to prevent rod bending and side loads. A plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX150S
- ✓ 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 SI63AX150S FAQ
Yes, the SI63AX150S is discontinued. The direct replacement is the SAI63AX150S. It shares the same ISO 15552 mounting interface, 63mm bore, 150mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. Force output is 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX150S replacement — usually within 7-8 hours.