This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X175S, 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 SI63X175S
The AirTAC Airtac SI63 Standard Cylinder SI63X175S 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 SAI63X175S, 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 → SAI63X175S
- 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 SI63X175S
The AirTAC SI63X175S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 175 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X175S, matching the exact interface, bore, stroke, force, port and mounting hardware.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked. This -S SKU includes a piston magnet for CS1-B/DS1-B switches; the SAI uses current AirTAC switches.
Airtac SI63 Standard Cylinder SI63X175S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X175S |
| 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 SAI63X175S 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 SAI63X175S 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 SI63X175S
| 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 SI63X175S Is Used
Clamp Actuation
Drives medium-duty workholding clamps on machining fixtures, using its 1559 N push force to secure heavy metal parts during milling.
Package Diversion
Powers a 175 mm stroke diverter arm on a packaging line, pushing cartons between adjacent conveyor belts at speeds up to 800 mm/s.
Replacing the Airtac SI63 Standard Cylinder SI63X175S with the SAI63X175S
To replace the SI63X175S, order the SAI63X175S. It is dimensionally interchangeable per the ISO 15552 mounting interface, keeping the 63 mm bore, 175 mm stroke, M16x1.5 rod thread and G3/8 port. Confirm your mounting accessory (LB, FA, TC, etc.) and thread option (PT, G, NPT). The -S magnet is retained. For sizing, a 50 mm bore gives 982 N push at 0.5 MPa, while an 80 mm bore gives 2513 N. Note: a plain cylinder drifts on air loss as the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variant. For this 175 mm stroke, ensure guide alignment to prevent rod bending side-loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X175S
- ✓ 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 SI63X175S FAQ
Yes, the SI63X175S is discontinued. The direct replacement is the SAI63X175S. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 175 mm stroke, output force, G3/8 port and mounting interface.
This 63 mm bore double-acting cylinder has a G3/8 air port. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X175S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X175S replacement — usually within 7-8 hours.