This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX175, 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 SI63BX175
The AirTAC Airtac SI63 Standard Cylinder SI63BX175 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 SAI63BX175, 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 → SAI63BX175
- 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 SI63BX175
The AirTAC SI63BX175 is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore, 175 mm stroke, and a SUS304 stainless steel rod. It delivers 1559 N push force at 0.5 MPa. The direct replacement is the SAI63BX175, matching the bore, stroke, G3/8 port, and ISO 15552 mounting interface exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63BX175 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX175 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX175 |
| 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 SAI63BX175 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 SAI63BX175 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 SI63BX175
| 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 SI63BX175 Is Used
Stainless Rod Clamping
Ideal for packaging equipment where the SUS304 rod resists washdown corrosion while providing 1559 N of clamping thrust.
175mm Divert Stroke
Provides a precise 175 mm diverting motion on conveyor lines, with adjustable end cushions absorbing kinetic energy.
Replacing the Airtac SI63 Standard Cylinder SI63BX175 with the SAI63BX175
To replace the SI63BX175, order the SAI63BX175. Verify the ISO 15552 mounting interface, the G3/8 port, and the SUS304 stainless rod requirement. This non-magnetic SKU cannot take a sensor; if position detection is needed, select an SAI equivalent with the S suffix for current AirTAC switches. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; drop to 50 mm for 982 N or step up to 80 mm for 2513 N. The cushion only decelerates the load; it does not hold it. If you need static holding on air loss, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX175
- ✓ 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 SI63BX175 FAQ
Yes, the SI63BX175 is discontinued. The direct replacement is the SAI63BX175. It shares the same ISO 15552 mounting interface, 63 mm bore, 175 mm stroke, G3/8 port, and SUS304 stainless rod, fitting existing fixtures perfectly.
The 63 mm bore features a G3/8 port. It delivers 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. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX175
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX175 replacement — usually within 7-8 hours.