This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX175S, 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 SI63BX175S
The AirTAC Airtac SI63 Standard Cylinder SI63BX175S 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 SAI63BX175S, 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 → SAI63BX175S
- 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 SI63BX175S
The AirTAC SI63BX175S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore, 175 mm stroke, and a SUS304 stainless steel piston rod. Delivering 1559 N push force at 0.5 MPa, it uses a G3/8 air port and includes a piston magnet for CS1-B/DS1-B switches. The direct replacement is the SAI63BX175S, matching the exact ISO 15552 mounting interface, bore, output force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note that a standard cylinder drifts without live air; for load holding, consider the SAIL lock or BSAI clamp-lock variants the SI line lacked.
Airtac SI63 Standard Cylinder SI63BX175S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX175S |
| 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 SAI63BX175S 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 SAI63BX175S 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 SI63BX175S
| 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 SI63BX175S Is Used
Stainless Rod Actuation
Ideal for packaging machinery requiring corrosion resistance, using the SUS304 rod to push 1559 N loads reliably in damp washdown environments.
Mid-Stroke Diverting
Provides precise 175 mm stroke diverting on material handling lines, moving products safely within the 935 N working load limit.
Vertical Lift Gates
Suitable for lifting access gates up to 79 kg, utilizing the G3/8 port and ISO 15552 mounting for straightforward fixture integration.
Replacing the Airtac SI63 Standard Cylinder SI63BX175S with the SAI63BX175S
To replace the SI63BX175S, order the SAI63BX175S direct, confirming the ISO 15552 interface, 63 mm bore, 175 mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. The -B rod option provides SUS304 stainless steel for corrosion resistance instead of the standard carbon steel. Sizing both ways: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. A plain cylinder does not hold load on air loss; the cushion only decelerates. For secure holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants. At 175 mm stroke, side-load is minimal, but ensure rigid guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX175S
- ✓ 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 SI63BX175S FAQ
Yes, the SI63BX175S is discontinued. The direct replacement is the SAI63BX175S. It features the same ISO 15552 mounting interface, 63 mm bore, 175 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The 63 mm bore uses a G3/8 air port. Force ratings 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX175S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX175S replacement — usually within 7-8 hours.