This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX175S, 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 SI63AX175S
The AirTAC SI63 Standard Cylinder SI63AX175S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 175mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX175S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke175 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX175S
- 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 SI63AX175S
The AirTAC SI63AX175S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 175 mm stroke, and a SUS420J2 stainless steel piston rod. Generating 1559 N push force at 0.5 MPa, it is replaced by the SAI63AX175S. This direct successor retains the exact G3/8 port, M16x1.5 thread, and ISO 15552 mounting interface for existing fixtures.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The original -S magnet supports CS1-B/DS1-B switches, while the SAI family adds SAIL, SAIF, and BSAI lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63AX175S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX175S |
| Bore size | Ø63 mm |
| Stroke | 175 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 SAI63AX175S 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 SAI63AX175S 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 SI63AX175S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×175 | 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 SI63AX175S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion resistance in packaging machines requiring 1559 N push force over a 175 mm travel.
Material Diversion
Provides robust 1402 N pull force at 0.5 MPa to pivot heavy diverters on 63 mm bore ISO 15552 mounting assemblies.
Replacing the Airtac SI63 Standard Cylinder SI63AX175S with the SAI63AX175S
To replace the SI63AX175S, order the SAI63AX175S. Confirm the ISO 15552 mounting interface, 63 mm bore, 175 mm stroke, G3/8 port, and SUS420J2 rod. The -S magnet enables CS1-B/DS1-B sensors. If sizing down, a 50 mm bore yields 982 N push at 0.5 MPa; sizing up to 80 mm provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use the SAIL or BSAI lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX175S
- ✓ 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 SI63AX175S FAQ
Yes, the SI63AX175S is discontinued. The direct replacement is the SAI63AX175S. It is dimensionally interchangeable per ISO 15552, keeping the same 63 mm bore, 175 mm stroke, G3/8 port, and mounting interface.
The G3/8 port bore delivers push 1559 N and pull 1402 N at 0.5 MPa, push 2182 N at 0.7 MPa, push 2805 N at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa. It operates at 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX175S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX175S replacement — usually within 7-8 hours.