This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX170S, 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 SI63AX170S
The AirTAC Airtac SI63 Standard Cylinder SI63AX170S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 170mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX170S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke170 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX170S
- 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 SI63AX170S
The AirTAC SI63AX170S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 170mm stroke, and a SUS420J2 stainless steel rod. Delivering 1559N push at 0.5MPa via a G3/8 port, it is replaced by the SAI63AX170S. This direct upgrade keeps the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade features an improved piston seal with two Y-shaped one-way elements 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 lock, SAIF valve, and BSAI clamp variants.
Airtac SI63 Standard Cylinder SI63AX170S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX170S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX170S |
| Bore size | Ø63 mm |
| Stroke | 170 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 SAI63AX170S 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 SAI63AX170S 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 SI63AX170S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×170 | 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 SI63AX170S Is Used
Stainless Rod Actuation
Leverages the SUS420J2 rod for corrosion resistance in washdown clamping tasks requiring 1559N force.
Pallet Stop Gate
Provides a robust 63mm bore barrier to halt pallets, benefiting from the 30-800mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63AX170S with the SAI63AX170S
To replace the SI63AX170S, order the SAI63AX170S. Confirm the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and the -S magnet for current AirTAC switches. The -A rod is SUS420J2 stainless steel; default is carbon steel. Sizing both ways: a 50mm bore gives 982N push @0.5MPa, while an 80mm bore gives 2513N. For this 170mm stroke, ensure guide alignment to prevent rod bending. 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 variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX170S
- ✓ 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 SI63AX170S FAQ
Yes, the SI63AX170S is discontinued. The direct replacement is the SAI63AX170S. It shares the same ISO 15552 mounting interface, 63mm bore, 170mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The G3/8 port feeds a 63mm bore yielding 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a max of 318kgf at 1.0MPa. The cushion only decelerates; it does not hold load without air.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX170S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX170S replacement — usually within 7-8 hours.